Comparison of the Electromyographic activity, Quadriceps: Hamstring coactivation ratio and strength changes of dominant leg muscles in collegiate football and volleyball players during different forms of exercises
Journal Title: Biology of Exercise - Year 2015, Vol 11, Issue 2
Abstract
The preliminary study was aimed to compare electromyographic (emG) activity, Quadriceps: hamstring coactivation (Q: h) ratio and 1- repetition maximum (rm) squat changes of dominant leg muscles in collegiate football and volleyball players during different forms of exercises. Surface emG analysis was carried out in 24 university level trained male players, football (n=12) and volleyball (n=12) while performing the following exercises: unilateral bridges, lunges, lateral step up to a 20.32 cm (8 inch) platform, quadruped arm/ lower extremity lift in the first session. The emG activities of vastus medialis obliquus (VmO) and hamstrings muscles of dominant leg of the players of both groups were recorded using Power lab emG system (lab Chart, aD instruments, ml-818, australia). On the next session, 1-rm squat tests were also performed on the same players of both groups. In footballers, the lateral step-up, lunges and quadruped arm/ lower extremity lift and in volleyball players, only lunges produced emG levels greater than 45% maximum voluntary isometric contraction (mVIC) in the VmO, which suggests that they may be beneficial for strengthening that muscle. all the exercises produced emG levels less than 45% mVIC in hamstrings in both groups of players, so they may be more beneficial for training endurance and stabilization. The study also revealed smallest Q: h coactivation ratio in all exercises in volleyball players suggesting more hamstring activity than quadriceps but in footballers, moderate Q:h coactivation ratios were obtained establishing the quadriceps dominant activation in all these exercises. The 1- rm squat testing also showed significantly greater value (p=0.00) in football players than volleyball players. The findings in this study may be used to select specific exercises to enhance a core training programme depending on the individual needs of an athlete or as per the requirement of the specific sport.
Authors and Affiliations
TanzIla Taj| Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia, New Delhi, India, Subhra ChaTTerjee (nee KarmaKar)| Centre for Physiotherapy and Rehabilitation Sciences, Jamia Millia Islamia, New Delhi, India
Keywords
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- EP ID EP15871
- DOI http:doi.org/10.4127/jbe.2015.0093
- Views 351
- Downloads 18
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