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| Abstract : Universiti Pendidikan Sultan Idris |
| The objectives of this study is to determine the chronic effects of unilateral versus bilateral resistance
training on physical performance, movement mechanics, bilateral deficit and muscle architecture.
Forty-five trained men were recruited as study participants and were divided into three groups; i)
unilateral, ii) bilateral and iii) control group. The participants were divided into groups according to
their 1RM strength performance in order to ensure that each groups are balanced in terms of strength
or lifting abilities. During this study, participants underwent pre-test consisted of physical
performance tests (unilateral and bilateral 1RM test, 30m sprint, vertical jump, agility t-test),
movement mechanics (muscle activation and kinematics), bilateral deficit (sum of left and right limbs
compared to bilateral strength score) and muscle architecture (muscle thickness, pennation angle and
fascicle length of vastus lateralis, biceps femoris, biceps brachii, triceps brachii) followed by six
weeks of training intervention before been assessed of their physical performance, movement
mechanics, bilateral deficit and muscle architecture again. Results showed that both unilateral and
bilateral group managed to significantly improve all the physical performance parameters during the
post-test. Unilateral group managed to obtained significantly greater unilateral 1RM score in both
squat and bicep curl while bilateral group obtained significantly greater 1RM strength in bilateral
1RM. No significant differences were found comparing 30m sprint, agility t-test, vertical jump,
muscle activation, joint velocity and bilateral deficit between both training groups. Findings
demonstrated that both performing unilateral and bilateral was similarly effective in improving
physical performance. |
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