Ade, J. D., Harley, J. A., & Bradley, P. S. (2014). Physiological response, time- motion characteristics, and reproducibility of various speed-endurance drills in elite youth soccer players: Small-sided games versus generic running. International Journal of Sports Physiology and Performance, 9(3), 471–479. https://doi.org/10.1123/IJSPP.2013-0390 

Ahad, N. A., Yin, T. S., Othman, A. R., & Yaacob, C. R. (2011). Sensitivity of normality tests to non-normal data. Sains Malaysiana, 40(6), 637–641. 

Ahmad Hashim. (2014). Panduan Analisis Data Secara Efisien: Panduan Lengkap Berajah untuk Menganalisis Data. Bangi: Dubook Press Sdn Bhd. 

Ali, Z., & Bhaskar, S. B. (2016). Basic statistical tools in research and data analysis. Indian Journal of Anaesthesia, 60(9), 662–669. https://doi.org/10.4103/0019-5049.190623 

Al-Syurgawi, D. (2018). The effects of a 6-week plyometric training on muscular strength performance in silat olahraga. Journal Movement, Health & Exercise, 7(1), 189–200. https://doi.org/http://dx.doi.org/10.15282/mohe.v7i1.188 

Armatas, V., Giannakos, A., Ampatis, D., & Sileloglou, P. (2005). Analysis of the Successful Counter-Attacks in High-Standard Soccer Games. Inquiries in Sport & Physical Education, 3(2), 187–195. 

Arnason, A., Sigurdsson, S. B., Gudmundsson, A., Holme, I., Engebretsen, L., & Bahr, R. (2004). Physical Fitness, Injuries, and Team Performance in Soccer. Medicine and Science in Sports and Exercise,36(2),278–285 https://doi.org/10.1249/01.MSS.0000113478.92945.CA 

Aziz, A., Newton, M. J., Tan, H. Y., & Teh, K. C. (2006). Variation in Fitness Attributes of Players During a Competitive Season in an Asian Professional Soccer League: a Field-Based Investigation. Asian Journal of Exercise & Sports Science, 3(1), 40–45. http://search.ebscohost.com/login.aspx?direct=true&db=sph&AN=3512959 1&site=ehost-live 

Babatunde, O. (2010). Fundamentals of Probability and Statistic for Engineer (1st Ed). CRC Press.https://books.google.com.my/books?hl=en&lr=&id=6RKRgR6PxqwC&oi=fnd&pg=PP1&dq= introduction+ to+statistics+babatunde+2011&ots =NREuUbCw-V&sig=i5yu7Q0EH-rYuGjt6wUJzFS4P3I&redir_esc=y#v= one page&q=introduction to statistics babatunde 2011&f=false 

Balsom, P. (1994). Evaluation of Physical Performance (B. Ekblom (ed.)).Blackwell Scientific Publications. 

Bangsbo, J. (1994). Fitness Training in Football: A Scientific Approach (illustrate). August Krogh Institute, University of Copenhagen, 1994. https://books.google.com.my/books/about/Fitness_Training_in_Football.ht ml?id=piKLQgAACAAJ&redir_esc=y 

Baskoro, W. C., Akhmad, I., & Simatupang, N. (2020). Agility Side Step Test Development Test Device Motion Sensor Based. Advances in Health Sciences Research, 23 (December 2019), 23–24. https://doi.org/10.2991/ahsr.k.200305.001 

Belegišanin, B. (2017). Effects of high-intensity interval training on aerobic fitness in elite Serbian soccer players. Exercise and Quality of Life, 9(2), 13–17. https://doi.org/10.31382/eqol.171202 

Bishop, D., Spencer, M., Duffield, R., & Lawrence, S. (2001). The validity of Repeatde Sprint Ability test. Journal of Science and Medicine in Sport, 4, 11. 

Boone, J., Vaeyens, R., Steyaert, A., Bossche, L. VANDEN, & Bourgois, J. (2012). Physical Fitness Of Elite Belgian Soccer Players By Player Position. Journal Of Strength and Conditioning Research, 26(8), 2051–2057. www.nsca.com 

Buchheit, M. (2017). Small-Sided Games in Elite Soccer: Does one size fits all? Journal of Sports Physiology & Performance, 1–19. https://doi.org/10.1007/bf01481466 

Buchheit, M. (2017). Locomotor and heart rate responses of floaters during small- sided games in elite soccer players: effect of pitch size and inclusion of goal keepers. Journal of Sports Physiology & Performance, 1–10. 

Buchheit, M. (2019). Programming high-speed running and mechanical work in relation to technical contents and match schedule in professional soccer. Sportsperfsci, 6, 4–6. 

Buchheit, M. (2019). Managing high-speed running load in professional soccer players: The benefit of high-intensity interval training supplementation. Sport Performance & Science Reports, 1, 1–5. 

Buchheit, M. (2020). Pre-season fitness testing in elite soccer : integrating the 30-15 Intermittent Fitness Test into the weekly microcycle. Journal Sport Performance & Science, 1(111), 1–3. 

Bujnovsky, D., Maly, T., Ford, K., Sugimoto, D., Kunzmann, E., Hank, M., & Zahalka, F. (2019). Physical Fitness Characteristics of High-level Youth Football Players: Influence of Playing Position. Sports, 7(2), 46. https://doi.org/10.3390/sports7020046 

Carling, C., F.Le Gall, & G.Dupont. (2012). Are physical performance and injury risk in a professional soccer team in match-play affected over a prolonged period of fixture congestion? International Journal of Sports Medicine, 33(1), 36–42. http://www.embase.com/search/results?subaction =viewrecord & from =export&id=L560062961 

Chamari, K., Hachana, Y., Kaouech, F., Jeddi, R., Moussa-Chamari, I., & Wisløff, U. (2005). Endurance training and testing with the ball in young elite soccer players. Journal Sport Medicine, 39, 24–28. https://doi.org/10.1136/bjsm.2003.009985 

Chaouachi, A., Manzi, V., Chaalali, A., Wong, D. P., Chamari, K., & Castagna,C. (2012). Determinants analysis of change-of-direction ability in elite soccer players. Journal of Strength and Conditioning Research,26(10),2667–2676. https://doi.org/10.1519/JSC.0b013e318242f97a 

Chase, J. A. D. (2015). Interventions to increase physical activity among older adults: A meta-analysis. Gerontologist, 55(4), 706–718. https://doi.org/10.1093/geront/gnu090 

Christensen, P. M., Krustrup, P., Gunnarsson, T. P., Kiilerich, K., Nybo, L., & Bangsbo, J. (2011). VO2 kinetics and performance in soccer players after intense training and inactivity. Medicine and Science in Sports and Exercise, 43(9), 1716–1724. https://doi.org/10.1249/mss.0b013e318211c01a 

Christou, M., Smilios, I., Sotiropoulos, K., Volaklis, K., Pilianidis, T., & Tokmakidis, S. P. (2006). Effects of resistance training on the physical capacities of adolescent soccer players. Journal of Strength and Conditioning Research, 20(4), 783–791. https://doi.org/10.1519/R-17254.1 

Çinarli, Fahri Safa, Sahin Kafkas, A., & Kafkas, M. E. (2018). Relationship Between Linear Running and Change of Direction Performances of Male Soccer Players. Turkish Journal of Sport and Exercise, August. https://doi.org/10.15314/tsed.418840 

Clemente, F. M., Sarmento, H., Rabbani, A., Van Der Linden, C. M. I. (Niels., Kargarfard, M., & Costa, I. T. (2019). Variations of external load variables between medium- and large-sided soccer games in professional players. Research in Sports Medicine, 27(1), 50–59. https://doi.org/10.1080/15438627.2018.1511560 

Clemente, F. M., Martins, F. M. L., & Mendes, R. S. (2014). Periodization based on small-sided soccer games: Theoretical considerations. Strength and Conditioning Journal, 36(5), 34–43. https://doi.org/10.1519/SSC.0000000000000067 

Çobanoglu, H. O., & Terekli, M. S. (2018). Affects of Defense Unit on Score (Goals) in Soccer. International Journal of Sport, Exercise & Training Sciences, 4(2), 57–63. https://doi.org/10.18826/useeabd.401683 

Cometti, G., Maffiuletti, N. A., Pousson, M., Chatard, J. C., & Maffulli, N. (2001). Isokinetic strength and anaerobic power of elite, subelite and amateur French soccer players. International Journal of Sports Medicine, 22(1), 45–51. https://doi.org/10.1055/s-2001-11331 

Cooper, K. H. (1968). A Means of Assessing Maximal Oxygen Intake. Jama, 203(3), 201. https://doi.org/10.1001/jama.1968.03140030033008 

Cowan, G. (1998). Statistical Data Analysis. Oxford University Press Inc. Cronbach, L. J. (1951). Coefficient alpha and the internal structure of tests. 

Journal of Mathematic Statistic, 16(1951), 297–334. 

Cross, K. (2013). The Football Coaching Process. 

Dellal, A., Lago-Peñas, C., Rey, E., Chamari, K., & Orhant, E. (2013). The effects of a congested fixture period on physical performance, technical activity and injury rate during matches in a professional soccer team. British Journal of Sports Medicine, 49(6), 1-5. https://doi.org/10.1136/bjsports-2012-091290 

Denadai, B., Alves, R., Leonardo, D. A., & Rabello, C. (2017). Explosive Training and Heavy Weight Training are Effective for Improving Running Economy in Endurance Athletes : A Systematic Review and Meta-Analysis. 545–554. https://doi.org/10.1007/s40279-016-0604-z 

Di Mascio, M., Ade, J., & Bradley, P. S. (2015). The reliability, validity and sensitivity of a novel soccer-specific reactive repeated-sprint test (RRST). European Journal of Applied Physiology, 115(12), 2531–2542. https://doi.org/10.1007/s00421-015-3247-0 

Di Mascio, M., Ade, J., Musham, C., Girard, O., & Bradley, P. S. (2017). Soccer- Specific Reactive Repeated-Sprint Ability in Elite Youth Soccer Players. Journal of Strength and Conditioning Research, Publish Ahead of Print. https://doi.org/10.1519/jsc.0000000000002362 

Dragijsky, M., Maly, T., Zahalka, F., Kunzmann, E., & Hank, M. (2017). Seasonal Variation of Agility, Speed and Endurance Performance in Young Elite Soccer Players. Sports, 5(1), 12. https://doi.org/10.3390/sports5010012 

Fajrin, F., Kusnanik, N. W., & Wijono. (2018). Effects of High Intensity Interval Training on Increasing Explosive Power, Speed, and Agility. Journal of Physics: Conference Series, 947(1). https://doi.org/10.1088/1742- 6596/947/1/012045 

Ferrari Bravo, D., Impellizzeri, F. M., Rampinini, E., Castagna, C., Bishop, D., & Wisloff, U. (2008). Sprint vs. interval training in football. International Journal of Sports Medicine, 29(8), 668–674. https://doi.org/10.1055/s-2007- 989371 

Fernandez-Fernandez, J., Ulbricht, A., & Ferrauti, A. (2014). Fitness testing of tennis players: How valuable is it. British Journal of Sports Medicine, 48(SUPPL. 1). https://doi.org/10.1136/bjsports-2013-093152 

Fiorilli, G., Mitrotasios, M., Iuliano, E., Pistone, E. M., Aquino, G., Calcagno, G., & Di Cagno, A. (2017). Agility and change of direction in soccer: Differences according to the player ages. Journal of Sports Medicine and Physical Fitness, 57(12), 1597–1604. https://doi.org/10.23736/S0022-4707.16.06562-2 

Gabbett, T. J., & Mulvey, M. J. (2013). Time-motion analysis of small-sided training games and competition in elite women soccer players. The Journal of  Strength & Conditioning Research, 22(2), 543–552.  https://doi.org/10.1519/JSC.0b013e3181635597 

García-Pinillos, F., Ruiz-Ariza, A., Moreno del Castillo, R., & Latorre-Román, P. (2015). Impact of limited hamstring flexibility on vertical jump, kicking speed, sprint, and agility in young football players. Journal of Sports Sciences, 33(12), 1293–1297. 

https://doi.org/10.1080/02640414.2015.1022577 

Gil, S., Barroso, R., Crivoi do Carmo, E., Loturco, I., Kobal, R., Tricoli, V., Ugrinowitsch, C., & Roschel, H. (2018). Effects of resisted sprint training on sprinting ability and change of direction speed in professional soccer players. Journal of Sports Sciences, 36(17), 1923–1929. https://doi.org/10.1080/02640414.2018.1426346 

Gioftsidou, A., Malliou, P., Pafis, G., Beneka, A., & Godolias, G. (2011). Effects of a soccer training session fatigue on balance ability. Journal of Human Sport and Exercise, 6(3), 521–527. https://doi.org/10.4100/jhse.2011.63.06 

Goosey-tolfrey, V. L., Tolfrey, K., Goosey-tolfrey, V. L., & Tolfrey, K. (2008). Journal of Sports Sciences The multi-stage fitness test as a predictor of endurance fitness in wheelchair athletes wheelchair athletes. Journal of Sports Sciences, 26:5 (May 2008), 511–517. https://doi.org/10.1080/0264041- 

0701624531 

Greig, M., & Walker-Johnson, C. (2007). The influence of soccer-specific fatigue on functional stability. Physical Therapy in Sport, 8(4), 185–190. https://doi.org/10.1016/j.ptsp.2007.03.001 

Gumusdag, H., Unlu, C., Cicek, G., Kartal, A., & Evli, F. (2013). The Yo-Yo intermittent recovery test as an assessesment of aerobic-anaerobic fitness and game-related endurance in soccer. International Journal of Academic Research, 5(3), 148–153. https://doi.org/10.7813/2075-4124.2013/5-3/a.21 

Hader, K., Palazzi, D., & Buchheit, M. (2015). Change of direction speed in soccer: How much braking is enough? Kinesiology, 47(1), 67–74. 

Harman, E. & Garhammer, J. (2008) Administration, Scoring, and Interpretation of Selected Tests. In: Baechle, T.R. and Earle, R.W., Eds., Essentials of Strength Training and Conditioning, 3rd Edition, Human Kinetics, Champaign, IL, 249-292. 

Hazell, T. J., MacPherson, R. E. K., Gravelle, B. M. R., & Lemon, P. W. R. (2010). 

10 or 30-S Sprint Interval Training Bouts Enhance Both Aerobic and Anaerobic Performance. European Journal of Applied Physiology, 110(1), 153–160. https://doi.org/10.1007/s00421-010-1474-y 

Helgerud, J., Rodas, G., Kemi, O. J., & Hoff, J. (2011). Strength and endurance in elite football players. International Journal of Sports Medicine, 32(9), 677– 682. https://doi.org/10.1055/s-0031-1275742 

Helgerud, J., Høydal, K., Wang, E., Karlsen, T., Berg, P., Bjerkaas, M., Simonsen, T., Helgesen, C., Hjorth, N., Bach, R., & Hoff, J. (2007). Aerobic high- intensity intervals improve V. O2max more than moderate training. Medicine 

and Science in Sports and Exercise, 39(4), 665–671. https://doi.org/10.1249/mss.0b013e3180304570 

Helms, M. M., & Nixon, J. (2010). Exploring SWOT analysis – where are we now?: A review of academic research from the last decade. In Journal of Strategy and Management (Vol. 3, Issue 3). https://doi.org/10.1108/17554251011064837 

Henry, F. M., & Henry, F. M. (1964). Journal of Health, Physical Education, Recreation. Physical Education and Sport, 35(7)(January 2015), 32–69. https://doi.org/10.1080/00221473.1964.10621849 

Herring, S. A., Bergfeld, J. A., Boyd, J. L., Brolinson, P. G., Chang, C. J., Glover, D. W., Grana, W. A., Indelicato, P., Johnson, R. J., Kibler, W. B., Kraemer, 

W. J., McNearney, J. P., Pallay, R. M., & Tanji, J. L. (2001). The team physician and conditioning of athletes for sports: A Consensus Statement. Medicine and Science in Sports and Exercise, 33(10), 1789–1793. https://doi.org/10.1097/00005768-200110000-00027 

Hewitt, A., Greenham, G., & Norton, K. (2016). Game style in soccer: What is it and can we quantify it? International Journal of Performance Analysis in Sport, 16(1), 355–372. https://doi.org/10.1080/24748668.2016.11868892 

Hill-Haas, S. V., Coutts, A. J., Rowsell, G. J., & Dawson, B. T. (2009). Generic versus small-sided game training in soccer. International Journal of Sports Medicine, 30(9), 636–642. https://doi.org/10.1055/s-0029-1220730 

Hoff, J., & Helgerud, J. (2004). Endurance and Strength Training for Physiological Considerations. Sport Medicine, 34(3), 165–180. 

Hoff, Jan, Wisløff, U., Engen, L. C., Kemi, O. J., & Helgerud, J. (2002). Soccer specific aerobic endurance training. British Journal of Sports Medicine, 36(3), 218–221. https://doi.org/10.1136/bjsm.36.3.218 

Horicka, P., Hianik, J., & Šimonek, J. (2014). The relationship between speed factors and agility in sport games. Journal of Human Sport and Exercise, 9(1), 49–58. https://doi.org/10.4100/jhse.2014.91.06  

Harper, D. J., Carling, C., & Kiely, J. (2019). High-Intensity Acceleration and Deceleration Demands in Elite Team Sports Competitive Match Play: A Systematic Review and Meta-Analysis of Observational Studies. Sports Medicine, 49(12), 1923–1947. https://doi.org/10.1007/s40279-019-01170-1 

Houssain, M. (2013). Impact of Plyometric Training and Coordination Ladder Training on some Physical and Skill Variables for Basketball players. Assiut Journal of Sport Science and Arts, 113(1), 518–535. https://doi.org/10.21608/ajssa.2013.71003 

Howard, N., & Stavrianeas, S. (2017). In-Season High-Intensity Interval Training Improves Conditioning In High School Soccer Players. International Journal of Exercise Science, 10(5), 713–720. 

Howell, M. L. (1969). Toward a History of Sport. Journal of Health, Physical Education, Recreation, 40(3), 77–80. https://doi.org/10.1080/00221473.1969.10618603 

Hua, A. K. (2016). Pengenalan Rangkakerja Metodologi dalam Kajian Penyelidikan : Satu Kajian Kes Abstrak Introduction to Metodology Framework in Research Study : A Case Study Abstract Pengenalan. Malaysian Journal of Social Sciences and Humanities, 1(1), 17–23. 

Iaia, F. M., Fiorenza, M., Perri, E., Alberti, G., Millet, G. P., & Bangsbo, J. (2015). The effect of two speed endurance training regimes on performance of soccer players. PloS ONE, 10(9), 1–16. https://doi.org/10.1371/journal.pone.0138096 

Iaia, F. M., & Bangsbo, J. (2010). Speed endurance training is a powerful stimulus for physiological adaptations and performance improvements of athletes. Scandinavian Journal of Medicine and Science in Sports, 20(SUPPL. 2), 11– 23. https://doi.org/10.1111/j.1600-0838.2010.01193.x 

Iaia, F. M., Rampinini, E., & Bangsbo, J. (2009). High-intensity training in football. International Journal of Sports Physiology and Performance, 4(3), 291–306. https://doi.org/10.1123/ijspp.4.3.291 

Iaia, F. M., Hellsten, Y., Nielsen, J. J., Fernström, M., Sahlin, K., & Bangsbo, J. (2009). Four weeks of speed endurance training reduces energy expenditure during exercise and maintains muscle oxidative capacity despite a reduction in training volume Four weeks of speed endurance training reduces energy expenditure during exercise and maintain. Journal of Apply Physiology, 106, 73–80. https://doi.org/10.1152/japplphysiol.90676.2008 

Impellizzeri, F. M., Marcora, S. M., Castagna, C., Reilly, T., Sassi, A., Iaia, F. M., & Rampinini, E. (2006). Physiological and performance effects of generic versus specific aerobic training in soccer players. International Journal of Sports Medicine, 27(6), 483–492. https://doi.org/10.1055/s-2005-865839 

Impellizzeri, F. M., Rampinini, E., Castagna, C., Bishop, D., Ferrari Bravo, D., Tibaudi, A., & Wisloff, U. (2008). Validity of a repeated-sprint test for football. International Journal of Sports Medicine, 29(11), 899–905. https://doi.org/10.1055/s-2008-1038491 

Impellizzeri, F. M., Rampinini, E., Coutts, A. J., Sassi, A., & Marcora, S. M. (2004). Use of RPE-based training load in soccer. Medicine and Science in Sports and Exercise, 36(6), 1042–1047. https://doi.org/10.1249/01.MSS.0000128199.23901.2F 

Impellizzeri, F. M., McCall, A., Ward, P., Bornn, L., & Coutts, A. J. (2020). Training Load and Its Role in Injury Prevention , Part 2 : Conceptual and Methodologic Pitfalls. Journal of Athletic Training, 55(9), 893–901. https://doi.org/10.4085/1062-6050-500-19 

J. Bradley Jordan, Korgaokar, A. D., Farley, R. S., & Caputo, J. L. (2012). Acute effects of static and proprioceptive neuromuscular facilitation stretching on sprint performance in male swimmers. Journal of Exercise Science, 5(2), 97– 

105. https://digitalcommons.wku.edu/ijes/vol5/iss2/2 

Jamaluddin Ahmad (2002). Kesahan, Kebolehpercayaan dan Keberkesanan Modul Program Maju Diri ke Atas Motivasi Pencapaian di Kalangan Pelajar Sekolah Menengah Negeri Selangor. Tesis Doktor Falsafah yang tidak diterbitkan. Serdang: Universiti Putra Malaysia. 

Jamieson, J. (2004). Analysis of covariance (ANCOVA) with difference scores. International Journal of Psychophysiology, 52(3), 277–283. https://doi.org/10.1016/j.ijpsycho.2003.12.009 

Jastrzebski, Z., Barnat, W., Dargiewicz, R., Jaskulska, E., Szwarc, A., & Radziminski, L. (2014). Effect of in-season generic and soccer-specific high- intensity interval training in young soccer players. International Journal of Sports Science and Coaching, 9(5), 1169–1179. https://doi.org/10.1260/1747-9541.9.5.1169 

Jeffreys, I. (2004). The use of small-sided games in the metabolic training of high  school soccer players. Strength and Conditioning Journal, 26(5), 77–78. https://doi.org/10.1519/00126548-200410000-00016 

Jovanovic, M.(2011). Physical preparation for soccer. https://www.8weeksout.com/wordpress/wp-content/uploads/2011/05/ Physical-Preparation-for-soccer-8WeeksOut-special-edition-2011.pdf 

Jovanovic, M. A., Poris, G. O. S., & Mrcen, D. A. O. (2011). Effects Of Speed,Agility,Quickness Training Method On Power Performance In Elite Soccer Players. Journal of Strength and Conditioning Research, 25(5), 1285– 1292. 

Junaidy, H., Gunathevan, E., & Norlena, S. (2014). the Readiness of Prospective Physical Education Teachers Towards Upgrading the Teaching Professionalism. IMPACT: International Journal of Research in Applied, Natural and Social Sciences (IMPACT: IJRANSS), 2(5), 309–314. 

Kawakami, Y., Nozaki, D., Matsuo, A., & Fukunaga, T. (1992). Reliability of measurement of oxygen uptake by a portable telemetric system. European Journal of Applied Physiology and Occupational Physiology, 65(5), 409– 414. https://doi.org/10.1007/BF00243506 

Knoepfli-Lenzin, C., Sennhauser, C., Toigo, M., Boutellier, U., Bangsbo, J., Krustrup, P., Junge, A., & Dvorak, J. (2010). Effects of a 12-week intervention period with football and running for habitually active men with mild hypertension. Scandinavian Journal of Medicine & Science in Sports, 20 Suppl 1, 72–79. https://doi.org/10.1111/j.1600-0838.2009.01089.x 

Kolmogorov, A. N. (1956). On Skorokhod Convergence. Theory Of Probability And Its Applications, 1(2), 215–222. https://doi.org/10.1137/1101017 

Krustrup, P., Hellsten, Y., & Bangsbo, J. (2004). Intense interval training enhances human skeletal muscle oxygen uptake in the initial phase of dynamic exercise at high but not at low intensities. Journal of Physiology, 559(1), 335–345. https://doi.org/10.1113/jphysiol.2004.062232 

Krustrup, P., Mohr, M., Amstrup, T., Rysgaard, T., Johansen, J., Steensberg, A., Pedersen, P. K., & Bangsbo, J. (2003). The Yo-Yo Intermittent Recovery Test : Physiological Response , Reliability ,. Journal Medicine & Science in Sport         &         Exercise, 0195- 9131 /03/ 3504- 0697,97–705. https://doi.org/10.1249/01.MSS.0000058441.94520.32 

Kumar,R. (2011).Research Methodology (3rd Edition)  www.sagepublications.com. 

Kunz, P., Engel, F. A., Holmberg, H. C., & Sperlich, B. (2019). A Meta- Comparison of the Effects of High-Intensity Interval Training to Those of Small-Sided Games and Other Training Protocols on Parameters Related to the Physiology and Performance of Youth Soccer Players. Sports Medicine - Open, 5(1). https://doi.org/10.1186/s40798-019-0180-5 

Lago-Peñas, C., Rey, E., Casáis, L., & Gómez-López, M. (2014). Relationship between performance characteristics and the selection process in youth soccer players. Journal of Human Kinetics, 40(1), 189–199. https://doi.org/10.2478/hukin-2014-0021 

Lamb, K. L., & Rogers, L. (2007). A re-appraisal of the reliability of the 20 m multi-stage shuttle run test. European Journal of Applied Physiology, 100(3), 287–292. https://doi.org/10.1007/s00421-007-0432-9 

Léger, L. A., & Lambert, J. (1982). A maximal multistage 20-m shuttle run test to predict {Mathematical expression}O2 max. European Journal of Applied Physiology and Occupational Physiology, 49(1), 1–12. https://doi.org/10.1007/BF00428958 

Lennemann M, L., M. Sidrow, K., M. Johnson, E., R. Harrison, C., N. Vojta, C., & Thomas B., W. (2013). The Influence of Agility Training on Physiological and Cognitive performance. Journal of Strength and Conditioning Research / National Strength & Conditioning Association, 27(12), 3300–3309. https://doi.org/10.1519/JSC.0b013e31828ddf06 

Liu, H., Gomez, M. Á., Lago-Peñas, C., & Sampaio, J. (2015). Match statistics related to winning in the group stage of 2014 Brazil FIFA World Cup. Journal  of Sports Sciences, 33(12), 1205–1213. https://doi.org/10.1080/02640414.2015.1022578 

Little, T., & Williams, A. G. (2005). Specificity of acceleration, maximum speed, and agility in professional soccer players. Journal of Strength and Conditioning Research, 19(1), 76–78. https://doi.org/10.1519/14253.1 

Lockie, R. G., & Jalilvand, F. (2017). Reliability and Criterion Validity of the Arrowhead Change-of-Direction Speed Test for Soccer. Physical Education and Sport, 15, 139–151. https://doi.org/10.22190/FUPES1701139L 

Lobiondo, W., & Judith, H. (2018). Nursing research e-book: methods and critical appraisal for evidence-based practice (9th Edition). Elsevier. https://lccn.loc.gov/2017008727 

Lukasz, R., Pawel, R., Wojciech, B., Robert, D., & Zbigniew, J. (2013). A Comparison of the Physiological and Technical Effects of High-Intensity Running and SSG in Young Soccer Players. International Journal Sport Science & Coaching, 8(3), 455–463. 

Lupo, C., Ungureanu, A. N., Varalda, M., & Brustio, P. R. (2019). Running technique is more effective than soccer-specific training for improving the sprint and agility performances with ball possession of prepubescent soccer players. Biology of Sport, 36(3), 249–255. https://doi.org/10.5114/biolsport.2019.87046 

Lloyd, R. S., Oliver, J. L., Radnor, J. M., Rhodes, B. C., Faigenbaum, A. D., & Myer, G. D. (2014). Relationships between functional movement screen scores, maturation and physical performance in young soccer players. Journal of Sports Sciences,  33(1), 11–19. https://doi.org/10.1080/02640414.2014.918642 

Majid, M. K. (1990). Kaedah penyelidikan pendidikan (P. book : Malay (ed.).Dewan Bahasa dan Pustaka, 1990. 

Majid, M. K. (1994). Kaedah penyelidikan pendidikan (P. book : Malay (ed.).Dewan Bahasa dan Pustaka, 1990. 

Majid, M. K. (1998). Kaedah penyelidikan pendidikan (P. book : Malay (ed.).Dewan Bahasa dan Pustaka, 1990. 

McMillan, K., Helgerud, J., Macdonald, R., & Hoff, J. (2005). Physiological adaptations to soccer specific endurance training in professional youth soccer players. British Journal of Sports Medicine, 39(5), 273–277. https://doi.org/10.1136/bjsm.2004.012526 

Miller, G. A., & Chapman, J. P. (2001). Misunderstanding analysis of covariance. Journal of Abnormal Psychology, 110(1), 40–48. https://doi.org/10.1037/0021-843X.110.1.40 

Mohd Taib Harun & Norlena Salamuddin (2007). Modul Open Universiti Malaysia: Kecergasan Fizikal. Kuala Lumpur 

Mohr, M., Krustrup, P., & Bangsbo, J. (2003). Match performance of high- standard soccer players with special reference to development of fatigue. Journal of Sports Sciences, 21(7), 519–528.   https://doi.org/10.1080/0264041031000071182 

Mohr, M., Nassis, G. P., Brito, J., Randers, M. B., Castagna, C., Parnell, D., & Krustrup, P. (2020). Return to elite football after the COVID-19 lockdown. Managing Sport and Leisure, 0(0), 1–9.  https://doi.org/10.1080/23750472.2020.1768635 

Milanovic, Z., Sporiš, G., & Weston, M. (2015). Effectiveness of High-Intensity Interval Training (HIT) and Continuous Endurance Training for VO2max Improvements: A Systematic Review and Meta-Analysis of Controlled Trials. Sports Medicine, 45(10), 1469–1481. https://doi.org/10.1007/s40279-015-0365-0 

Miller, M. G., Herniman, J. J., Ricard, M. D., Cheatham, C. C., & Michael, T. J. (2006). The effects of a 6-week plyometric training program on agility. Journal of Sports Science and Medicine, 5(3), 459–465 

Najib, A. G. (1999). Penyelidikan Pendidikan. Penerbit Universiti Teknologi Malaysia, 1999. 

Najib, A. G. (2003). Reka bentuk tinjauan soal selidik pendidikan. Penerbit Universiti Teknologi Malaysia (UTM), ©2003. 

Nassis, G. P., Geladas, N. D., Soldatos, Y., Sotiropoulos, A., Bekris, V., & Souglis, A. (2009). Relationship between the 20-m multistage shuttle run test and 2 soccer-specific field tests for the assessment of aerobic fitness in adult semi- professional soccer players. Journal of Strength and Conditioning Research, 24(10), 2693–2697. https://doi.org/10.1519/JSC.0b013e3181bf0471 

Nedelec, M., McCall, A., Carling, C., Legall, F., Berthoin, S., & Dupont, G. (2012). Recovery in Soccer: Part I-post-match fatigue and time course of recovery. Sports Medicine, 42(12), 997–1015.  https://doi.org/10.2165/11635270-000000000-00000 

Noon, M. R., James, R. S., Clarke, N. D., Akubat, I., & Thake, C. D. (2015). Perceptions of well-being and physical performance in English elite youth footballers across a season. Journal of Sports Sciences, 33(20), 2106–2115. https://doi.org/10.1080/02640414.2015.1081393 

Noor, A. M., Hazley, F., & Nadzalan, A. M. (2017). The Effectiveness of Small, Medium and Big Games Training on Cardiovascular Endurance among University Football Players. International Journal of Academic Research in Progressive Education and Development, 6(4), 2–8. https://doi.org/10.6007/ijarped/v6-i4/3532 

Onwuegbuzie, A. J., & Leech, N. (2006). Linking research questions to mixed methods data analysis procedures. The Qualitative Report, 11(3), 474–498. 

Owen, A. L., Wong, D. P., Paul, D., & Dellal, A. (2014). Physical and technical comparisons between various-sided games within professional soccer. International Journal of Sports Medicine, 35(4), 286–292. https://doi.org/10.1055/s-0033-1351333 

Patel, H., Alkhawam, H., Madanieh, R., Shah, N., Kosmas, C. E., & Vittorio, T. J. (2017). Aerobic vs anaerobic exercise training effects on the cardiovascular system . World Journal of Cardiology, 9(2), 134. https://doi.org/10.4330/wjc.v9.i2.134 

Paul, D. J., & Nassis, G. P. (2015). Physical Fitness Testing in Youth Soccer: Issues and Considerations Regarding Reliability, Validity and Sensitivity. Pediatric Exercise Science, 27(3), 301–313.  https://doi.org/10.1123/mc.2014-0085 

Rago, V., Silva, J. R., Mohr, M., Barreira, D., Krustrup, P., & Rebelo, A. N. (2019). Variability of activity profile during medium-sided games in professional soccer. Journal of Sports Medicine and Physical Fitness, 59(4), 547–554. https://doi.org/10.23736/S0022-4707.18.08376-7  

Rahnama, N., Lees, A., & Reilly, T. (2006). Electromyography of selected lower- limb muscles fatigued by exercise at the intensity of soccer match-play. Journal of Electromyography and Kinesiology, 16, 257–263. https://doi.org/10.1016/j.jelekin.2005.07.011 

Ramsbottom, R., Brewer, J., & Williams, C. (1988). A progressive shuttle run test to estimate maximal oxygen uptake r. Journal Sport Medicine, 22(4), 141–144. https://doi.org/http://dx.doi.org/10.1136/bjsm.22.4.141 

Rampinini, E., Bishop, D., Marcora, S. M., Ferrari Bravo, D., Sassi, R., & Impellizzeri, F. M. (2007). Validity of simple field tests as indicators of match-related physical performance in top-level professional soccer players. International Journal of Sports Medicine, 28(3), 228–235. https://doi.org/10.1055/s-2006-924340 

Randolph, J. J. (2009). A guide to writing the dissertation literature review.Practical Assessment, Research and Evaluation, 14(13). 

Reilly, T. (1997). Energetics of high-intensity exercise (soccer) with particular reference to fatigue. Journal of Sports Sciences, 15(3), 257–263. https://doi.org/10.1080/026404197367263 

Reilly, T. (2007). The Science of Training- Soccer (T. Reilly (ed.); 1st Editio).Routledge Taylor & French Group. 

Rösch, D., Hodgson, R., Peterson, L., Graf-Baumann, T., Junge, A., Chomiak, J., & Dvorak, J. (2000). Assessment and evaluation of football performance. American Journal of Sports Medicine, 28(5 SUPPL.), 29–39. https://doi.org/10.1177/28.suppl_5.s-29 

Rowan, A. E., Kueffner, T. E., & Stavrianeas, S. (2012). Short Duration High- Intensity Interval Training Improves Aerobic Conditioning of Female College Soccer Players. International Journal of Exercise Science, 5(3), 232– 238.http://search.ebscohost.com/login.aspx?direct=true&db=sph&AN=8221 7727&site=ehost-live 

Sarmento, H., Anguera, M. T., Pereira, A., Marques, A., Campaniço, J., & Leitão, J. (2014). Patterns of play in the counterattack of elite football teams - A mixed method approach. International Journal of Performance Analysis in Sport, 14(2), 411–427. https://doi.org/10.1080/24748668.2014.11868731 

Sekaew, W., & Thawichai, Khaothin Wimonmas, P. (2014). Effects Of A 4 Week Plyometrics Training Pattern On Muscle Power And Agility In Male Soccer Players. Journal of Sports Science and Technology, 14(1), 11–24. http://www.sportscience.or.th /jsst/index.php/2jsst/article/view/19 

Sheppard, J., & Young, W. (2006). Agility literature review: Classifications, training and testing. Journal of Sports Sciences, 24(9), 919–932. https://doi.org/10.1080/02640410500457109 

Shin, S. (2019). Examination of the characteristics of the field test to evaluate the cardiovascular endurance of soccer players. Journal of the Korea Convergence Society, 10(4), 195–201.  https://doi.org/https://doi.org/10.15207/JKCS.2019.10.4.195 

Schmitz, B., Pfeifer, C., Kreitz, K., Borowski, M., Faldum, A., & Brand, S. M. (2018). The Yo-Yo intermittent tests: A systematic review and structured compendium of test results. Frontiers in Physiology, 9(JUL), 1–16. https://doi.org/10.3389/fphys.2018.00870 

Sperlich, B., Markus, D. M. E., Karsten, K., John, L., & Holmberg, Hans-Christer Mester, J. (2011). Effects Of 5 Weeks Of High-Intensity Interval Training Vs. Volume Training In 14-Year-Old Soccer Players. Journal of Strength and Conditioning Research, 25(5), 1271–1278.  https://doi.org/10.1519/JSC.0b013e3181d67c38 

Sporiš, G., Šamija, K., Vlahovic, T., Milanovic, Z., Barišic, V., Bonacin, D., & Talovic, M. (2012). The latent structure of soccer in the phases of attack and defense. Collegium Antropologicum, 36(2), 593–603. 

Sporis, G., Jukic, I., Luka, M., & Vucetic, V. (2010). Reliability And Factorial Validity Of Agility Tests For Soccer Players. Journal of Strength and Conditioning Research, 24(3), 679–686. 

Stolen, T., Chamari, K., Castagna, C., & Ulrik, W. (2005). Physiology of Soccer. International Journal of Sports Medicine, 35(6), 501–536. https://doi.org/https://doi.org/10.2165/00007256-200535060-00004 

Siong, T. L., Othman Ahmad, S., & Yong, H. T. (2013). Penyelidikan tindakan dalam pendidikan (P. book : Malay (ed.). Kuala Lumpur : Freemind Horizons, 2013. 

Stone, K. J., & Oliver, J. L. (2009). The effect of 45 minutes of soccer- specific exercise on the performance of soccer skills. International Journal of Sports Physiology and Performance, 4(2), 163–175.  https://doi.org/10.1123/ijspp.4.2.163 

Sutarto Hadi, Imam Gunawan, J. D. (2018). Statistika Inferansial Teori dan   Aplikasinya (2nd Edition). Rajawali Pers. 

Svensson, M., & Drust, B. (2005). Testing soccer players. Journal of Sports Sciences, 23(6), 601–618. https://doi.org/10.1080/02640410400021294 

Tan, C. W. K., Chow, J. Y., & Davids, K. (2012). “How does TGfU work?”: Examining the relationship between learning design in TGfU and a nonlinear pedagogy. Physical Education and Sport Pedagogy, 17(4), 331–348. https://doi.org/10.1080/17408989.2011.582486 

Tenga, A., Holme, I., Ronglan, L. T., & Bahr, R. (2010). Effect of playing tactics on goal scoring in Norwegian professional soccer. Journal of Sports Sciences, 28:3(Feb 2010), 237–244. https://doi.org/10.1080/02640410903502774 

Tenga, A., Holme, I., Ronglan, L. T., & Bahr, R. (2010). Effect of playing tactics on achieving score-box possessions in a random series of team possessions from Norwegian professional soccer matches. Journal of Sports Sciences, 28(3), 245–255. https://doi.org/10.1080/02640410903502766 

Valette, R. M. (1977). Modern Language Testing (Second Edi). Harcourt Brace Jovanovich, Inc. 

Walsh, B. Y. J. E. (1963). Bounded Probability Properties Of Kolmogorov- Smirnov And Similar Statistics For Discrete Data. Journal of Mathematic Statistic, 153–158. https://doi.org/10.1007/BF02865912 

Walker, S., & Turner, A. (2009). A one-day dield test battery for the assessment of aerobic capacity, anaerobic capacity, speed, and agility of soccer players. Strength and Conditioning Journal, 31(6), 52–60. https://doi.org/10.1519/SSC.0b013e3181c22085 

Wood, R. J. (2010). Complete Guide to Fitness Testing. 

Wragg, C. B., Maxwell, N. S., & Doust, J. H. (2000). Evaluation of the reliability and validity of a soccer-specific field test of repeated sprint ability. European Journal of Applied Physiology, 83(1), 77–83. https://doi.org/10.1007/s004210000246 

Wrigley, J. M. (2016). A study to validate the use of; The Modified Balsom Run as an accurate measurement of repeated sprint ability in U18 elite (Issue April). Leeds Beckett University 

Zulakbal, K., Hanis, A. G. A., & Ali, N. (2018). Exploring Effective Training Methods to Improve Football Performance: Effects of Small Sided Games on Cardiovascular Endurance. International Journal of Engineering & Technology, 7(2), 158–160 

Zhang, W., & Creswell, J. (2013). The use of mixing procedure of mixed methods  in health services research. Medical Care, 51(8), 51–57. https://doi.org/10.1097/MLR.0b013e31824642fd