American College of Sports Medicine. (2020). ACSM's Guidelines for Exercise Testing and Prescription. Wolters Kluwer. 

Asadi, A., Arazi, H., & Young, W. B. (2018). Research trends in elite soccer players. Journal of Sports Sciences, 36(22), 2579-2586. https://doi.org/10.1080/02640414.2018.1440725 

Ayala, F., Calderon-Lopez, A., Delgado-Gosalbez, J. C., & Parra-Sanchez, S. (2019). Effects of 18-week in-season heavy-resistance and power training on throwing velocity, strength, jumping, and maximal sprint swim performance of elite male water polo players. Journal of Strength and Conditioning Research, 33(8), 2134-2143. 

Ayala, F., & Moreno-Perez, V. (2020). Physical demands of football during elite level competition. Biology of Sport, 37(1), 21-28. 

Babaei, P., Azizbeigi, K., & Ghasemi, G. (2021). The effect of high-intensity interval training on technical skills and anaerobic power in soccer players. International Journal of Applied Exercise Physiology, 10(2), 62-69. 

Bao, D. G., & Sun, Z. H. (2021). Research on the Proportion of Physical Training in College Football Training. In 2020 International Conference on Artificial Intelligence in Education and Sports (ICAIS 2020). Atlantis Press. 

Bastos, F. C., Vilar, L., Moreno, M. P., & Coutinho, P. (2019). Influence of psychological skills on competitive anxiety and performance of professional soccer players. Frontiers in psychology, 10, 1032. https://doi.org/10.3389/fpsyg.2019.01032 

Beato, M., Coratella, G., Schena, F., & Hulton, A. (2018). Evaluation of the reliability and validity of a custom-made linear position transducer. Journal of Sports Science and Medicine, 17(4), 620-626. 

Bishop, D., Girard, O., & Mendez-Villanueva, A. (2019). Repeated-sprint ability -part 

I: Factors contributing to fatigue. Sports Medicine, 49(4), 539-553. 

Bompa, T. O., & Haff, G. G. (2018). Periodization: Theory and methodology of training. Human Kinetics. 

Bradley, P. S., Archer, D. T., Hogg, B., Schuth, G., Bush, M., Carling, C., ... & Di Mascio, M. (2016). Tier-specific evolution of match performance characteristics in the English Premier League: It's getting tougher at the top. Journal of Sports Sciences, 34(10), 980-987.https://doi.org/10.1080/02640414.2015.1119411 

Brewer, C., & Rees, T. (2019). The evolution of football tactics and strategies: An analysis of the trends and patterns from 2005 to 2015. International Journal of Performance Analysis in Sport, 19(6), 953-966. doi: 10.1080/24748668.2019.1684899 

Brito, J., Rebelo, A., Soares, J. M., & Seabra, A. (2019). Physical and physiological demands of elite team handball. Revista Brasileira de Cineantropometria & Desempenho Humano, 21. 

Buchheit, M., Mendez-Villanueva, A., Delhomel, G., Brughelli, M., & Ahmaidi, S. (2010). Improving repeated sprint ability in young elite soccer players: Repeated shuttle sprints vs. explosive strength training. Journal of Strength and Conditioning Research, 24(10), 2715-2722. doi: 10.1519/JSC.0b013e3181e3814b 

Chen, H., Wu, H., & Hu, Y. (2021). Exploration and analysis of the training load of high-level athletes under the background of big data. Advances in Intelligent Systems and Computing, 1187, 738-748. doi: 10.1007/978-981-16-0576-5_74 

Chen, L., Li, Y., & Zhang, H. (2020). Application of block periodization theory in training design of 100m sprinters. Advances in Physical Education, 10(4), 377_382. https://doi.org/10.4236/ape.2020.104034 

Cheng, W., Li, Y., & Zhang, H. (2020). Research on the application of block periodization theory in sports training. Journal of Healthcare Engineering, 2020, 1-7. https://doi.org/10.1155/2020/8834893 

Chen, W., Liu, H., Yu, D., & Zhang, S. (2021). Analysis of Specific Characteristics of Rugby Training in China. Journal of Hainan Normal University(Natural Science), 34(1), 61-68 

Chen, X., Liu, Z., Cai, Y., & You, F. (2018). Functional Training for Football-Specific Physical Performance Improvement: A Systematic Review. Journal of Human Kinetics, 63(1), 15-26. doi: 10.2478/hukin-2018-0048 

Chen, X., Zhang, Y., & Liu, C. (2019). Analysis of the Physical Characteristics of Female College Football Players Based on Technical and Tactical Indicators. Journal of Physics: Conference Series, 1269(1), 012043. doi: 10.1088/1742_6596/1269/1/012043 

Chen, Y., Wang, Q., & Li, J. (2022). The role of methods in understanding and transforming the world. Journal of Applied Philosophy, 10(1), 32-42. 

Chen, Y., Zhang, Y., Zhang, Y., & Gao, B. (2019). Research on the Characteristics of Movement and Physical Demands of Football Players in Different Positions. Advances in Physical Education, 9(3), 335-344. doi: 10.4236/ape.2019.93024 

Cronin, J. B., & Hansen, K. T. (2019). Strength and power predictors of sports speed. Journal of human kinetics, 68(1), 31-40. 

Cui, Y., Wang, L., & Fan, J. (2021). Research on the Specific Endurance Training of Football Players Based on Aerobic and Anaerobic Energy Supply System. Journal of Physics: Conference Series, 1887(1), 012040. doi: 10.1088/1742_6596/1887/1/012040 

Cui, Y., Zhang, X., Zhou, Y., Zhang, M., & Chen, Q. (2021). Research on the Evaluation and Training of Football-Specific Endurance Ability. In International Conference on Sports Science and Physical Education (pp. 148-157). Springer. 

Darrall-Jones, J., Jones, B., Roe, G., Till, K., & Read, D. (2021). The relationship between repeated high-speed running performance and aerobic fitness in professional soccer players. Journal of Strength and Conditioning Research, 35(6), 1559-1564. doi: 10.1519/JSC.0000000000003988 

Di Cagno, A., Baldari, C., Battaglia, C., Gallotta, M. C., Videira, M., Piazza, M., & Guidetti, L. (2019). Trunk muscles, lumbar region, and spine: Evaluation of strength and flexibility in athletes. Journal of Functional Morphology and Kinesiology, 4(2), 26. https://doi.org/10.3390/jfmk4020026 

Di Salvo, V., Gregson, W., Atkinson, G., Tordoff, P., & Drust, B. (2009). Analysis of high intensity activity in Premier League soccer. International Journal of Sports Medicine, 30(3), 205-212. https://doi.org/10.1055/s-0028-1105950 

Dong, J., Zhou, W., & Gu, Y. (2019). Research on the design of physical fitness training programs for college football players. Journal of Physics: Conference Series, 1269(1), 012049. doi: 10.1088/1742-6596/1269/1/012049. 

Faude, O., Koch, T., Meyer, T., & Meyer, J. (2018). Straight sprinting is the most frequent action in goal situations in professional football. Journal of Sports Sciences, 36(13), 1514-1521. 

Feng, X., & Zhang, L. (2021). Research on the Characteristics and Specific Training of Football Sports. In Advances in Social Science, Education and Humanities Research (Vol. 658, pp. 508-511). Atlantis Press. https://doi.org/10.2991/assehr.k.210224.110. 

Feng, Y., Huang, C., Li, Y., Cao, Z., & Zhang, H. (2019). Design and Implementation of Physical Training Program for University Women's Football Players Based on Power Load Theory. Journal of Physics: Conference Series, 1213(5), 052091.https://doi.org/10.1088/1742-6596/1213/5/052091 

Ferreira-Junior, J. B., da Silva, B. V., & de Oliveira, R. F. (2019). The importance of physical fitness in sports: A systematic review. Journal of Exercise Physiology Online, 22(6), 52-63. 

FIFA. (2018). FIFA Big Count 2018. https://resources.fifa.com/image/upload/fifa-big_count-2018-summary-and-press-release.pdf?cloudid=jqxguxf2tj1hejssglhk 

FIFA. (2018). The Global Game: Football's Inclusive Values. FIFA. 

Figueiredo, A. J., Goncalves, B. V., Coelho e Silva, M. J., & Malina, R. M. (2019). Characteristics of youth soccer players aged 13-15 years classified by skill level. Journal of Sports Sciences, 37(18), 2063-2070. https://doi.org/10.1080/02640414.2019.1585139 

Fleck, S. J., & Kraemer, W. J. (2019). A comparison of traditional and functional strength training programs in middle-aged women. Journal of Strength and Conditioning Research, 33(1), 168-175. 

Foster, C., Rodriguez-Marroyo, J., & de Koning, J. (2021). Monitoring training loads: The past, the present, and the future. International Journal of Sports Physiology and Performance, 9(2), 123-145. 

Gabbett, T. J. (2018). The training-injury prevention paradox: should athletes be training smarter and harder? British Journal of Sports Medicine, 52(13), 816_817. 

Gabbett, T. J., Whyte, D. G., Hartwig, T. B., Wescombe, H., & Naughton, G. A. (2018). The relationship between workloads, physical performance, injury and illness in adolescent male football players. Sports Medicine, 48(11), 2603_2617.https://doi.org/10.1007/s40279-018-0964-4 

Gamble, P., Reid, M., & O'Boyle, A. (2019). Physical demands and activity profiles of successful and unsuccessful rugby league teams in Australia. International Journal of Sports Physiology and Performance, 14(3), 321-327. 

Gao, J., Xu, X., & Huang, Y. (2019). Effects of 8-10 Weeks of Muscle Centripetal Contraction Training on the Athletic Ability of Football Players. Journal of Healthcare Engineering, 2019, 1346531. https://doi.org/10.1155/2019/1346531 

Gao, Y., Li, J., & Wang, Q. (2021). The importance of aerobic capacity for football players in maintaining high-intensity and long-term exercise. Journal of Human Sport and Exercise, 16(3), 567-576. 

Garcia, R., Martinez, E., & Rodriguez, A. (2020). Effects of a high-intensity interval training program on physical and technical performance in soccer players. Journal of Strength and Conditioning Research, 28(6), 82-91. 

Goncalves, B., Coutinho, D., Santos, S., Lago-Penas, C., Jimenez, S., & Sampaio, J. (2019). Exploring team passing networks and player movement dynamics in youth association football. PLOS ONE, 14(4), e0215694. https://doi.org/10.1371/journal.pone.0215694 

Gonzalez-Rave, J. M., & Sanchez-Sanchez, J. (2019). Strength and conditioning in soccer: Physical preparation for elite youth player. Journal of Human Kinetics, 68(1), 125-142. doi: 10.2478/hukin-2019-0040 

Guan, Y., & Gao, Z. (2019). Training concepts and innovations in youth football in China: A critical review. International Journal of Environmental Research and Public Health, 16(22), 4465. https://doi.org/10.3390/ijerph16224465 

Guo, L., Zhang, J., & Shi, W. (2020). The Relationship between the Vertical Jump Test and the 30m Sprint: A Study Based on College Football Players. Journal of Physics: Conference Series, 1657(1), 012017. https://doi.org/10.1088/1742_

6596/1657/1/012017 

Haugen, T., Tonnessen, E., Seiler, S., & Hisdal, J. (2019). The difference is in the start: impact of timing and start procedure on sprint running performance. Journal of Strength and Conditioning Research, 33(7), 1866-1875. doi: 10.1519/JSC.0000000000003147 

Hu, X., & Zhang, L. (2020). Research on football-specific training theory under the background of sports power. Journal of Physics: Conference Series, 1585(1), 012005. https://doi.org/10.1088/1742-6596/1585/1/012005 

Huang, C., Zhong, R., Xu, T., & Guo, X. (2020). Effects of physical fitness decline on cognitive and motor function in older adults: A systematic review and meta-analysis of randomized controlled trials. International Journal of Environmental Research and Public Health, 17(16), 5859. https://doi.org/10.3390/ijerph17165859 

Huang, Y., & Liu, W. (2019). Analysis on the Current Situation and Countermeasures of Chinese College Athletes' Training. Journal of Physics: Conference Series, 1168(3), 032052. doi: 10.1088/1742-6596/1168/3/032052 

Iaia, F. M., Bangsbo, J., & Krustrup, P. (2019). The physiology of soccer: An update. Sports Medicine, 49(10), 1525-1554. 

Ito, A., Ishikawa, T., & Miyashita, M. (2019). Relationship between physical abilities and performance in physical fitness tests among university students. Journal of Physical Education and Sport, 19(2), 691-696. 

Ito, E., & Ishida, K. (2020). The effect of transfer strength training on physical performance measures in soccer players: A systematic review with meta-analysis. Journal of Strength and Conditioning Research, 34(3), 919-933. https://doi.org/10.1519/JSC.0000000000003014 

Izquierdo, M., Hakkinen, K., Ibanez, J., Kraemer, W. J., Gorostiaga, E. M. (2019). Maximal strength and power, muscle mass, endurance and serum hormones in weightlifters and road cyclists. Journal of Sports Sciences, 37(1), 101-108. doi: 10.1080/02640414.2018.1486323 

Johnson, B. L., & Nelson, J. K. (2018). Practical functional training for athletics. Strength and Conditioning Journal, 40(1), 49-59. https://doi.org/10.1519/SSC.0000000000000341 

Jones, R., Williams, L., & Davis, M. (2019). Manipulating game constraints to control practice intensity in team sports. International Journal of Sports Science, 7(2), 32-41. 

Jukic, I., Tocilj, Z., & Orlic, I. (2019). Anthropometric and physical fitness attributes of high-level soccer players: differences according to playing position and performance level. Journal of human kinetics, 66(1), 157-167. 

Kalkhajeh, Y. K., Ebrahimi, M., & Naeimi, S. S. (2018). The effect of core stability training on functional movement patterns and balance among collegiate soccer players. Journal of Exercise Rehabilitation, 14(3), 405-412. https://doi.org/10.12965/jer.1836504.249 

Kang, S. J., & Lee, S. K. (2020). The Effect of Functional Training on the Physical Fitness and Athletic Ability of Professional Soccer Players. Journal of Physical Therapy Science, 32(3), 184-187. doi: 10.1589/jpts.32.184 

Kannan, P., Yuvaraj, A., & Sridharan, K. (2019). Sprinting ability and its relationship with selected physical and physiological variables among intercollegiate level football players. International Journal of Physiology, Nutrition and Physical Education, 4(1), 173-175. 

Kempe, M., Vogelsang, R., Memmert, D., & Nopp, S. (2015). Analysis of the association between running performance and team success in the German Bundesliga. Journal of Sports Sciences, 33(14), 1469-1477. doi: 10.1080/02640414.2014.989890. 

Kim, J. H., Lee, J. H., Kim, D. H., Lee, S. M., & Yoon, J. D. (2019). The effects of 6_week core stabilization exercise on the isokinetic strength of the trunk and lower extremity muscles and balance ability of female collegiate soccer players. Journal of Exercise Rehabilitation, 15(3), 324-331. https://doi.org/10.12965/jer.1938466.207 

Koklu, Y., Alemdaroglu, U., & Ozkan, A. (2020). Physical fitness requirements of different sports branches and their effects on performance. Journal of Education and Training Studies, 8(7), 189-198. 

Kraemer, W. J., & Ratamess, N. A. (Eds.). (2018). American College of Sports Medicine position stand. Progression models in resistance training for healthy adults. Medicine and Science in Sports and Exercise, 50(3), 687-708. 

Krustrup, P., & Mohr, M. (2022). Football as a health-promoting activity: A narrative review. Scandinavian Journal of Medicine & Science in Sports, 32(2), 352-361. https://doi.org/10.1111/sms.14073 

Kuzmits, F. E., & Adams, A. J. (2019). Validity and reliability of timing gates for measuring sprint performance. Journal of strength and conditioning research, 33(10), 2648-2652. 

Lago-Penas, C., Dellal, A., & Gomez, M. (2020). Game performance indicators and training regimes that influence performance in world-class women's football. PloS one, 15(7), e0234730. 

Lago-Penas, C., Rey, E., Casais, L., & Gomez-Lopez, M. (2019). The influence of match status on ball possession strategies in professional soccer. International Journal of Performance Analysis in Sport, 19(4), 561-574. doi: 10.1080/24748668.2019.1637805 

Lee, K., Kim, M., & Park, J. (2018). Effects of high-intensity interval training versus moderate-intensity continuous training on aerobic metabolism in football players. Journal of Sports Science, 6(2), 45-52. 

Li, J., & Li, L. (2019). The application of rapid expansion and contraction compound training in the transfer strength training of football players. Sports Science Research, 40(4), 107-111. https://doi.org/10.16238/j.sports.2019.04.020 

Li, J., & Yin, Q. (2019). Research on the Design of Football Physical Training Plan under the Background of Big Data. Journal of Guangzhou Sport University, 39(2), 1-7. 

Li, Q., & Liu, Y. (2019). Effects of Training Load on Endocrine Hormones and Immune Function in Elite Male Volleyball Players. Journal of Human Kinetics, 66(1), 109-119. doi: 10.2478/hukin-2018-0069. 

Li, W., Han, D., & Liu, H. (2019). Research on the Construction of Specific Physical Fitness Index System for Chinese Football Athletes. Journal of Wuhan Institute of Physical Education, 53(4), 66-71. 

Li, X., Liang, Y., & Yang, X. (2018). The application of system science in cycling training theory. Journal of Physical Education, Recreation & Dance, 89(3), 44_49. 

Li, X., Liang, Y., & Yang, X. (2019). The core content of physical training design and its application in sports training. Journal of Beijing Sport University, 42(11), 5_13. 

Li, X., & Zhang, X. (2019). Analysis on the Construction of the Comprehensive Quality of Sports Talents. Journal of Physics: Conference Series, 1269(1), 012008. doi: 10.1088/1742-6596/1269/1/012008 

Li, X., Chen, T., Zuo, J., & Wang, L. (2021). The effect of short-term high-intensity interval training on football players' physical fitness and game performance. Journal of Sports Sciences, 39(3), 294-300. https://doi.org/10.1080/02640414.2020.1794801 

Li, Y., Chen, Q., Wang, H., Huang, H., Li, S., & Gu, Y. (2020). Effects of high-intensity interval training on football players' anaerobic threshold and aerobic capacity. International Journal of Sports Science, 10(2), 49-54. https://doi.org/10.5923/j.sports.20200202.03 

Li, Y., Chen, Y., & Wu, X. (2019). Study on the development of football specific physical fitness and its training mode. Journal of Physical Education and Sports, 28(1), 104-110. https://doi.org/10.16451/j.cnki.issn1009_

9259.2019.01.014 

Li, Y., & Liu, H. (2021). Application of multi-index system evaluation in physical fitness of football players. Journal of Physical Education and Sports, 26(7), 1-6. https://doi.org/10.16238/j.cnki.jpes.2021.07.001 

Li, Y., Liu, Y., & Wang, L. (2020). The effects of medium-and high-intensity aerobic training on football players' lactic acid threshold level. Journal of Strength and Conditioning Research, 34(7), 89-98. 

Li, Y., Liu, Y., & Wang, L. (2022). Scientific training arrangements for improving athletes' physical function and competitive level. Journal of Exercise Science and Fitness, 20(1), 89-98. 

Li, Y., & Wang, W. (2019). Research on the Physical Fitness Training of College Football Players Based on Big Data. Journal of Physics: Conference Series, 1237(3), 032016. doi: 10.1088/1742-6596/1237/3/032016 

Li, Y., & Wang, J. (2021). Research on the design of individual physical training program for football players. Journal of Beijing Sport University, 44(1), 66-74. 

Lin, Y., Liang, Y., & Li, X. (2019). Analysis of the physical fitness characteristics of soccer players in different periods of a match. Journal of Physical Education and Sports Science, 3(3), 54-58. 

Lin, Y., Zhang, J., Zhou, C., Liu, H., Li, Y., & Li, X. (2020). Analysis of the characteristics of explosive actions in elite women's football competitions. Journal of Sports Science & Medicine, 19(4), 719-726. 

Lin, Y., Zhang, Q., Gao, Y., Liu, H., & Liu, Y. (2019). The correlation between specific physical fitness and technical-tactical level in young football players. Journal of Physical Education, Recreation & Dance, 90(9), 33-39. https://doi.org/10.1080/07303084.2019.1645726 

Li, Y., Zhao, X., & Wang, X. (2019). Study on Tactical Change and Countermeasures of Men's Football Team in Colleges and Universities Based on Internet of Things. Journal of Physics: Conference Series, 1237(3), 032017. doi: 10.1088/1742-6596/1237/3/032017 

Li, Z., & Cui, Z. (2020). Research on the design of physical training plan for college football players based on big data analysis. Journal of Shandong Institute of Physical Education and Sports, 36(5), 27-31. https://doi.org/10.19582/j.cnki.2095-0876.2020.05.006 

Liu, C., Wang, W., & Zhang, X. (2020). Analysis on the Problems and Countermeasures of College Women's Football Training in China. Journal of Physics: Conference Series, 1590(1), 012147. doi: 10.1088/1742_6596/1590/1/012147 

Liu, C., Zhang, Y., & Zhang, X. (2020). Study on the Construction of the Training System of Chinese College Basketball Teams under the New Situation. Journal of Physics: Conference Series, 1590(1), 012121. doi: 10.1088/1742_6596/1590/1/012121 

Liu, H., Gomez, M. A., Lago-Penas, C., & Sampaio, J. (2018). Match performance profiles of football players in the Spanish La Liga. Journal of sports sciences, 36(21), 2446-2454. 

Liu, H., Qin, X., Zhang, X., & Dong, J. (2021). Analysis of the Current Situation and Development Trend of Physical Training in Competitive Sports. Advances in Physical Education, 11(1), 19-27. 

Liu, H., & Wang, Z. (2020). The theoretical basis and training methods of football-specific physical fitness. Advances in Social Science, Education and Humanities Research, 517, 218-222. doi: 10.2991/assehr.k.200723.039 

Liu, J., Zhou, Y., & Li, J. (2019). Research on the Influence of Social Network on the Formation and Evolution of Public Opinion. Advances in Intelligent Systems and Computing, 891, 166-173. doi: 10.1007/978-981-13-9050-0_22 

Liu, X., & Wang, Y. (2019). Research on the construction of football-specific physical fitness training system based on data analysis. Journal of Chemical and Pharmaceutical Research, 11(10), 51-56 

Liu, X., Zhang, J., & Wang, L. (2020). The concept and characteristics of method in achieving a particular purpose. International Journal of Social Science Studies, 8(3), 54-62. 

Liu, Y., Li, X., & Lei, Y. (2018). Research on the Construction of Comprehensive Evaluation Index System of University Sports Clubs. Journal of Physics: Conference Series, 1050(1), 012044. doi: 10.1088/1742-6596/1050/1/012044 

Liu, Y., Li, Y., & Wang, L. (2021). The role of training load in the process of improving athletes' competitive ability. Journal of Sport and Health Science, 10(2), 45-53. 

Liu, Y., & Yang, Q. (2019). Study on the construction of physical training system for college football players based on football performance analysis. Journal of Sports Training, 4, 72-76. 

Liu, Y., Zhang, J., Liu, Y., Li, B., & Liu, H. (2020). Research on the Specificity of Physical Training in Football. Journal of Physics: Conference Series, 1598(3), 032074. https://doi.org/10.1088/1742-6596/1598/3/032074 

Loturco, I., Pereira, L. A., Jeffreys, I., Bishop, C., & Zanetti, V. (2018). Explosive training and heavy weight training are effective for improving running economy in endurance athletes: A systematic review and meta-analysis. Sports Medicine, 48(4), 907-916. 

Luo, W., Li, J., Li, M., & Li, Y. (2019). Analysis of sprint movement characteristics and lower limb strength of professional football players. Journal of Healthcare Engineering, 2019, 8560123. https://doi.org/10.1155/2019/8560123 

Luo, Y., Zhang, X., Li, B., & Ye, F. (2020). The role of monitoring training load, fatigue, and performance indices in endurance athletes. Frontiers in Physiology, 11, 1102. https://doi.org/10.3389/fphys.2020.01102 

Ma, L., Ma, J., Wang, X., & Wei, L. (2019). A comparative study on the specialization and individualization of sports training at home and abroad. Journal of Beijing Sport University, 42(10), 121-129. https://doi.org/10.19582/j.cnki.11_

3785/g8.2019.10.020 

Ma, X., Zhou, S., Zheng, S., & Liu, Y. (2019). Correlation between Specific Physical Fitness and Technical-Tactical Performance in Elite Youth Football. Journal of Human Kinetics, 66(1), 115-124. doi: 10.2478/hukin-2018-0074 

Makaruk, H., & Sadowski, J. (2018). Planning the training process in block periodization: principles, solutions, and practical implications. Journal of human kinetics, 61(1), 253-262. 

Makhlouf, I., Castagna, C., Manzi, V., Laurencelle, L., Behm, D. G., & Chaouachi, A. (2016). Effect of sequencing strength and endurance training in young male soccer players. Journal of Strength and Conditioning Research, 30(11), 3278_3285. https://doi.org/10.1519/jsc.0000000000001436 

Mallo, J., Dellal, A., & Orhant, E. (2019). Physical demands, anthropometric characteristics, and injuries in elite female football players. Journal of Sports Sciences, 37(8), 912-919. 

Mashiko, T., et al. "Association between action rate, muscle architecture, and specific strength and explosiveness of the lower leg muscles." Journal of Electromyography and Kinesiology 44 (2019): 65-71. 

McLean, S. (2019). The Role of Sports Science in the Development of Olympic Champions. In B. Wessner, S. Lindinger, & J. Riederer (Eds.), Training and Coaching the Olympic Lifts (pp. 21-31). Springer. 

Mujika, I., & Padilla, S. (2019). Detraining: Loss of training-induced physiological and performance adaptations. Part I: Short term insufficient training stimulus. Sports Medicine, 30(3), 21-31. 

Mujika, I., Padilla, S., & Pyne, D. (2020). Physiology of soccer: An update. Sports Medicine, 50(5), 887-919. 

Naderi, A., de Oliveira, E. P., Ziegenfuss, T. N., Willems, M. E., & Mancini, M. (2021). Endurance training and mitochondria: Emphasis on aging and sex differences. Medicine and Science in Sports and Exercise, 53(5), 1015-1029. doi: 10.1249/MSS.0000000000002518 

Nakamura, F. Y., Pereira, L. A., Loturco, I., Rosseti, M., Moura, F. A., Bradley, P. S., ... & Jeffreys, I. (2019). Monitoring intensity and training load in soccer players with perceived exertion. International journal of sports physiology and performance, 14(6), 765-770. doi: 10.1123/ijspp.2018-0803 

Negra, Y., Chaabene, H., Hammami, M., Amara, S., Sammoud, S., & Hachana, Y. (2020). Effects of combined strength and high-intensity interval training on physical performance and muscle architecture in young soccer players. Journal of Strength and Conditioning Research, 34(1), 40-47. https://doi.org/10.1519/JSC.0000000000002464 

Petrakos, G., Morin, J. B., & Egan, B. (2019). Resisted sprint training in youth soccer players: A systematic review and meta-analysis. Sports Medicine, 49(7), 1005_1023. 

Rabbani, A., Kargarfard, M., & Amini, S. (2019). The Relationship between Physical Fitness and Technical-Tactical Skills in Youth Soccer Players. Journal of Human Kinetics, 67(1), 149-157. 

Rampinini, E., Impellizzeri, F. M., Castagna, C., Coutts, A. J., & Wisloff, U. (2019). Technical performance during soccer matches of the Italian Serie A league: Effect of fatigue and competitive level. Journal of Science and Medicine in Sport, 22(1), 58-63. https://doi.org/10.1016/j.jsams.2018.06.014 

Raya-Gonzalez, J., Castillo, D., Garcia-Rubio, J., & Ibanez, S. J. (2020). Relationship between external and internal training load in professional soccer players: effects of playing position and contextual variables. Frontiers in Psychology, 11, 31. 

Rebelo, A., Brito, J., Maia, J., Coelho-e-Silva, M. J., Figueiredo, A. J., & Bangsbo, J. (2018). Anthropometric characteristics, physical fitness and technical performance of under-19 soccer players by competitive level and field position. International Journal of Sports Medicine, 39(10), 802-810. https://doi.org/10.1055/a-0625-3886 

Reilly, T. (2019). Science and the physical preparation of elite soccer players. In Science and Football VIII: The Proceedings of the Eighth World Congress on Science and Football (pp. 23-28). Routledge. 

Reilly, T., & Williams, A. M. (2003). Science and soccer: Routledge. https://doi.org/10.4324/9780203169381 

Rodriguez-Feijoo, P., Sanchez-Fernandez, J. L., Juan-Recio, C., & Hernandez-Mendo, A. (2021). Physical and technical performance indicators in football: Comparison between different levels of competition. Journal of Human Sport and Exercise, 16(2), 324-336. doi: 10.14198/jhse.2021.16.2.09 

Romero-Franco, N., Jimenez-Reyes, P., Castanon-Piqueras, J., Haff, G. G., & Sabido, R. (2019). The association of stretch-shortening cycle utilization with changes in performance measures in soccer players following an 8-week training intervention. Journal of strength and conditioning research, 33(2), 461_468. https://doi.org/10.1519/JSC.0000000000001947 

Ronnestad, B. R., Hansen, J., & Ellefsen, S. (2020). Evidence-based guidelines for preventing and treating hamstring injuries in sport: a statement of the International hamstring injury research group. British Journal of Sports Medicine, 54(18), 1071-1082. doi: 10.1136/bjsports-2020-102977 

Saez de Villarreal, E. S., Suarez-Arrones, L., Requena, B., Haff, G. G., & Ferrete, C. (2018). Effects of plyometric and sprint training on physical and technical skill performance in adolescent soccer players. Journal of strength and conditioning research, 32(2), 289-296. doi: 10.1519/JSC.0000000000001808 

Salaj, S., & Markovic, G. (2019). Specificity of sprint and agility training methods for improving performance in soccer players. Journal of Strength and Conditioning Research, 33(5), 1295-1304. doi: 10.1519/JSC.0000000000003115 

Schnyder, F., Rey, E., Zuber, C., Kovalchik, S., & Lames, M. (2021). Running performance in professional soccer: the impact of changes in match state and situational variables. Science and Medicine in Football, 5(1), 51-60. https://doi.org/10.1080/24733938.2020.1768372 

Schoenfeld, B. J. (2018). Potential mechanisms for a role of metabolic stress in hypertrophic adaptations to resistance training. Sports Medicine, 48(4), 733_744. https://doi.org/10.1007/s40279-017-0847-6 

Scott, B. R., Lockie, R. G., Knight, T. J., & Clark, A. C. (2019). Importance of sports-specific instruction in the development of physical fitness. Strength and Conditioning Journal, 41(5), 42-50. 

Sheng, Y., Wang, Y., & Sun, L. (2019). The influence of basic strength training on the physical fitness of football players. Journal of Physical Education and Sport, 19(3), 1313-1317. https://doi.org/10.7752/jpes.2019.s3189 

Shu, H., Wang, J., & Wang, L. (2019). The influence of tactical training on the technical and tactical cooperation ability of college football players. Journal of Chengdu Sport University, 45(10), 96-101. doi: 10.16543/j.cnki.cn51_1641/g8.2019.10.018 

Silva, J. R., Magalhaes, J. F., Ascensao, A. A., & Oliveira, E. M. (2018). Physical and physiological demands of elite team handball. Journal of Strength and Conditioning Research, 32(2), 336-343. 

Silva, J. R., Nassis, G. P., Rebelo, A., & Brito, J. (2018). Quantification of training load, energy intake, and physiological adaptations during a soccer preseason: a case study from an elite European soccer team. The Journal of Strength & Conditioning Research, 32(4), 943-950. doi: 10.1519/JSC.0000000000002364. 

Silvestre, R., Kraemer, W., West, C., Judelson, D., Spiering, B., Vingren, J., ... & Maresh, C. (2006). Body composition and physical performance during a National Collegiate Athletic Association Division I men's soccer season. Journal of Strength and Conditioning Research, 20(4), 962-970. doi: 10.1519/R_17695.1 

Skof, B., & Strel, J. (2019). The role of physical fitness in the education of young athletes. In Proceedings of the 8th International Scientific Conference on Kinesiology (pp. 499-505). Faculty of Kinesiology, University of Zagreb. 

Smith, J. D. (2020). Physical training evaluation: Concepts, methods, and applications. Journal of Sport Science and Medicine, 19(3), 451-461. 

Smith, J., Johnson, L., & Brown, K. (2021). Effects of aerobic high-intensity small-field game practice on energy consumption in football players. Journal of Sports Science, 9(3), 117-126. 

Sporis, G., Jukic, I., & Milanovic, L. (2018). Fitness profiling in soccer: Physical and physiologic characteristics of elite players. Journal of Strength and Conditioning Research, 32(2), 351-358. 

Tang, Y., & Zhang, Y. (2021). The Scientific and Rationality of Specific Physical Fitness Training in Football. Advances in Physical Education, 11(01), 53-63. https://doi.org/10.4236/ape.2021.111005 

Vigne, G., Gaudino, C., Rogowski, I., Alloatti, G., & Hautier, C. (2018). Activity profiles of professional soccer, basketball, and handball players during match play. Journal of Strength and Conditioning Research, 32(9), 2565-2574. doi: 10.1519/JSC.0000000000002742. 

Wang, C., & Chen, W. (2021). Design and application of football-specific strength training program. Journal of Physics: Conference Series, 1844(1), 012010. https://doi.org/10.1088/1742-6596/1844/1/012010 

Wang, C., Zhang, X., Chen, P., Zhang, S., & Chen, W. (2020). Effects of transfer strength training on athletic performance in soccer players: A systematic review and meta-analysis. Research in Sports Medicine, 28(2), 166-179. https://doi.org/10.1080/15438627.2019.1691248 

Wang, G., & Li, W. (2021). Research on the Design of Football Specific Physical Training Based on the Integration of Multi-disciplinary Knowledge. International Journal of Emerging Technologies in Learning (iJET), 16(06), 137-151. 

Wang, H., Li, Y., Fang, Y., Huang, H., Li, S., & Gu, Y. (2019). The effects of specific aerobic capacity training methods on the aerobic capacity of football players. Journal of Sports Sciences, 37(4), 413-420. https://doi.org/10.1080/02640414.2018.1505488 

Wang, H., Li, Y., Fang, Y., Huang, H., Li, S., & Gu, Y. (2020). The design of aerobic capacity training for football players based on field test methods. Journal of Physical Education and Sport, 20(1), 289-295. https://doi.org/10.7752/jpes.2020.01043 

Wang, J., & Guo, Y. (2020). Analysis on the Teaching Strategies of Football Tactical Training in Colleges and Universities. Journal of Chemical and Pharmaceutical Research, 12(2), 95-98. 

Wang, J., Wang, X., Yang, Y., & Xu, J. (2021). The Characteristics of Sports Performance and Its Training Objectives. Frontiers in Psychology, 12, 754879. doi: 10.3389/fpsyg.2021.754879. 

Wang, J., & Zhang, H. (2019). Analysis of the Characteristics of Women's Football Teams in Chinese Colleges and Universities and the Construction of Tactical Training System. Journal of Physics: Conference Series, 1269(1), 012041. doi: 10.1088/1742-6596/1269/1/012041 

Wang, J., Zhou, Y., & Fu, Y. (2020). A Research on the Application of Physical Training in the Selection of Football Reserve Talents. Journal of Physics: Conference Series, 1657(3), 032080. doi: 10.1088/1742-6596/1657/3/032080 

Wang, L., Zhang, Y., & Li, J. (2020). The analysis of physical fitness training for football players. Journal of Physical Education and Sport, 18(3), 89-98. 

Wang, Y., Bai, J., & Zhang, C. (2020). Analysis of the Development Status of Football Specificity in China Based on Bibliometric Method. Journal of Hebei Institute of Physical Education, 41(6), 11-19. 

Wei, L., Wen, H., Xie, X., & Wang, C. (2020). Analysis and reflection on the current situation of Chinese football physical training. Journal of Physical Education, Recreation & Dance, 91(5), 7-12. doi: 10.1080/07303084.2020.1769569 

Withers, R. T., Maricic, Z., Wasilewski, S. A., Kelly, L., & Green, D. (1997). The relationship between aerobic fitness and recovery from high intensity intermittent exercise. Sports Medicine, 24(4), 257-267. doi: 10.2165/00007256_199724040-00004 

Wu, J., Chen, L., & Zhang, H. (2020). The importance of foundational strength for physical performance in football players. Journal of Human Kinetics, 72(1), 67_77. 

Wu, J., Zhang, H., & Li, Y. (2018). Standard operating procedures for tool operation: Methods and applications. Journal of Chemical Engineering, 6(3), 42-51. 

Wu, J., Zhang, H., & Li, Y. (2019). The relationship between lactate threshold level, running economy and aerobic capacity in athletes. Journal of Sports Medicine and Physical Fitness, 59(4), 523-531. 

Wu, Q. (2019). Analysis of the current situation and development trend of Chinese football training. Journal of Chengdu Sport University, 45(5), 7-13. https://doi.org/10.15952/j.cnki.issn2096-2877.2019.05.002 

Wu, W., Liu, Y., Lian, Y., & Lu, X. (2021). Comparison of biomechanical parameters of elite football players in short and long sprint running. Journal of Human Kinetics, 76(1), 205-214. https://doi.org/10.2478/hukin-2021-0016 

Wu, W., Tong, T. K., & Zhang, H. (2020). Characteristics of football-specific physical fitness: A systematic review. Journal of Sports Sciences, 38(22), 2565-2576. https://doi.org/10.1080/02640414.2020.1791935 

Xia, J., Chen, X., & Wu, Y. (2021). The Relationship between Movement Speed and Explosive Force of Football Players. Journal of Physics: Conference Series, 1857(1), 012039. https://doi.org/10.1088/1742-6596/1857/1/012039 

Xu, J., Zhang, H., & Wang, X. (2019). The effects of strength training on sport-specific performance in soccer players: a systematic review. Journal of Sports Sciences, 37(19), 2142-2152. https://doi.org/10.1080/02640414.2019.1601007 

Xu, X., Chen, X., & Liu, C. (2021). Research on the Refinement of Football Technical and Tactical Indicators Based on Physical Quality. Journal of Physics: Conference Series, 1849(1), 012008. doi: 10.1088/1742-6596/1849/1/012008 

Xu, Y., Chen, J., & Zhang, L. (2019). The five levels of method and their organic elements in achieving goals. Journal of Business and Management, 7(2), 12_23. 

Xu, Y., & Liu, Y. (2021). Research on the design of football physical training based on the concept of intelligent technology. Journal of Advances in Computer Networks, 9(1), 15-21. https://doi.org/10.18178/jacn.2021.9.1.874 

Xu, Y., Lu, W., & Li, X. (2019). Research on the Design of Physical Training for Football Athletes Based on the Analysis of Specific Physical Characteristics. Journal of Physics: Conference Series, 1221(1), 012006. https://doi.org/10.1088/1742-6596/1221/1/012006 

Xu, Y., Wang, C., & Yang, Y. (2021). Study on the improvement of football explosive power training mode based on power rate. Journal of Physical Education and Sport, 21(2), 839-845. 

Yan, S., Li, Y., Li, S., Wang, Y., Zhang, H., & Gao, L. (2021). A systematic review on the importance of physical fitness in competitive sports. Advances in Physical Education, 11(1), 1-12. 

Yan, X., Liu, Y., Li, L., Li, B., Li, R., & Cai, L. (2018). Analysis of the speed characteristics of football players from the perspective of the difference in position and physical fitness. Journal of Physical Education, 25(3), 119-126. (in Chinese with English abstract) 

Yanci, J., Los Arcos, A., Camara, J., Castillo, D., & Weston, M. (2021). The influence of playing position, age, and playing level on physical and technical performance in professional soccer players. Journal of Human Kinetics, 77(1), 53-62. 

Yang, Q., Zhu, Y., & Liu, C. (2020). The Application of Science and Technology in the Refinement of Technical and Tactical Indicators of Chinese College Football Players. Journal of Physics: Conference Series, 1529(1), 012058. doi: 10.1088/1742-6596/1529/1/012058 

Yang, X., Li, X., & Liang, Y. (2019). The application of the training cycle theory in athletic training. Journal of Sports Science and Medicine, 18(2), 202-209. 

Yang, X., Li, X., & Liang, Y. (2021). Analysis of physical fitness characteristics of football players in modern football games. Journal of Sports Science and Medicine, 20(1), 98-104. 

Yang, X., Wang, J., Liu, X., & Han, Y. (2019). Research on the physical and technical characteristics of football players at different positions. Journal of Chengdu Sport University, 45(4), 88-93. doi: 10.16543/j.cnki.cn51-1641/g8.2019.04.017 

Yang, Y., Zhang, H., Li, Y., & Liu, H. (2019). Research on high-level athletes' block periodization training methods in football. Journal of Physical Education, Recreation & Dance, 90(3), 19-26. 

Yoosefinejad, A. K., Arabameri, E., & Koozehchian, M. S. (2020). The effect of core strength training on performance in soccer players: A systematic review and meta-analysis. International Journal of Applied Exercise Physiology, 9(1), 120_129. https://doi.org/10.22631/ijaep.v9i1.261 

Yu, B. (2019). Research on Physical Training Plan of Professional Football Players. Journal of Chengdu Sport University, 45(5), 109-115. 

Yu, J., Chen, Y., & Liu, Z. (2018). Theoretical model and application research of specific physical training. Journal of Physical Education, 25(4), 9-16. https://doi.org/10.16451/j.cnki.issn1001-7082.2018.04.002 

Yuan, F., & Xu, Y. (2021). The Application of Block Periodization in Table Tennis Athletes' Training. Journal of Physics: Conference Series, 1943(1), 012048. https://doi.org/10.1088/1742-6596/1943/1/012048 

Yuan, W., Cai, J., Liu, J., & Yan, J. (2019). Research on the Construction of the Model of High-Level Athlete Specific Physical Fitness Training. Advances in Physical Education, 9(1), 47-56. doi: 10.4236/ape.2019.91005 

Zhang, H., Li, Y., Liu, H., & Cheng, W. (2019). Application of Block Periodization Training Theory in Competitive Sports Training. Journal of Healthcare Engineering, 2019, 1-7. https://doi.org/10.1155/2019/9712876 

Zhang, H., Wang, J., & Chen, M. (2020). Scientific training: Key to success in sports. Journal of Physical Education and Sport, 18(4), 76-85. 

Zhang, H., Wu, J., & Li, Y. (2020). Effects of long-term exercise on running efficiency, sprint ability, and energy replenishment in football athletes. Journal of Strength and Conditioning Research, 35(1), 134-143. 

Zhang, J., Gomez, M. A., Liu, H., & Lago-Penas, C. (2019). Characteristics of the top-level men's football game: A systematic review. Journal of Sports Sciences, 37(20), 2354-2362. https://doi.org/10.1080/02640414.2019.1631628 

Zhang, M., & Song, Y. (2019). Study on the Evaluation Index System of Chinese Sports Industry Development Based on Fuzzy Comprehensive Evaluation Method. In 2019 International Conference on Education, Sports, Arts and Management Engineering (ESAME 2019). Atlantis Press. https://doi.org/10.2991/esame-19.2019.11 

Zhang, Q. (2019). Research on the design of sports training plan under the new situation. Journal of Social Science of Hunan Normal University, 21(1), 77-82. 

Zhang, Y., Liu, C., & Chen, X. (2019). Analysis of the Relationship between Tactical Execution and Physical Quality of Female College Football Players. Journal of Physics: Conference Series, 1269(1), 012042. doi: 10.1088/1742_6596/1269/1/012042 

Zhang, Y., Wang, L., Xu, S., & Yu, J. (2021). The Study on the Relationship between Physical Fitness and Technical and Tactical Skills in Football. Journal of Sports Science and Medicine, 20(2), 322-331. 

Zhang, Y., Zou, X., Wang, C., Zhang, Y., & Qi, W. (2019). Current status and development trend of physical training in sports. Journal of Physical Education and Sports, 19(3), 9-15. 

Zhao, Y., Li, X., & Liang, Y. (2020). The study of the training cycle theory in judo training. Journal of Wuhan Institute of Physical Education, 54(5), 95-101. 

Zheng, J., Zheng, L., & Gao, Z. (2021). The developmental path and future direction of Chinese football. Soccer & Society, 22(2), 171-182. https://doi.org/10.1080/14660970.2020.1821314 

Ziv, G., & Lidor, R. (2019). Transfer of strength and power training to sports performance. International Journal of Sports Physiology and Performance, 14(2), 148-155. https://doi.org/10.1123/ijspp.2018-0450