A Study of Electromyography of Lower Extremities and Comparison of Effects of Plyometric and Isotonic Weight Training
Purpose. The purpose of this study was to investigate and compare the effects of plyometric and weight (isotonic) training on lower extremity electromyography in physical education students. Basic procedures. In this study, 45 students from the physical education and sport sciences faculty of Shahid Chamran University were selected and divided in 3 groups (plyometric - 15, weight - 15, control - 15). Two experimental groups participated in a 6 week and a 3 week period sessions. The electrical changes of muscles were measured using sergeant test for explosive power and squat test for absolute power. Main findings. The data was collected via MT8 and analyzed using MBM. The results of the variance analysis test (ANOVA) were compared with the average values of electromyography changes (explosive and absolute power) and it was shown that electrical changes (explosive and absolute power) of biceps femoris muscle in all groups were non-significant whereas electrical changes (explosive and absolute power) of rectus femoris and gastrocenimus muscles were significant.
Oh, S. J., Clinical electromyography: nerve conduction studies. 3rd Ed. Lippincott Williams & Wilkins, 2002, 125-131.
Wilmore, J. H., Costill, D. L., Physiology of Sport and Exercise. Human Kinetics Pub., 1994.
Radcliffe, J. C., Farentinos, R. C., High-powered plyometrics. Human Kinetics Europe Ltd., 1999, 87-98.
Myer, G. D., Ford, K. R., McLean, S. G., Hewett, T. E., The effects of plyometric versus dynamic stabilization and balance training on lower extremity biomechanics. Am J Sports Med, 2006, 34(3), 445-455. DOI: 10.1177/0363546505281241.
Chimera, N. J., Swanik, K. A., Swanik, C. B., Straub, S. J., Effects of plyometric training on muscle-activation strategies and performance in female athletes. J Athl Train, 2004, 39(1), 24-31.
Lephart, S. M., Abt, J. P., Ferris, C. M., Sell, T. C., Nagai, T., Myers, J. B., Irrgang J. J., Neuromuscular and biomechanical characteristic changes in high school athletes: a plyometric versus basic resistance program. Br J Sports Med, 2005, 39(12), 932-938. DOI: 10.1136/bjsm.2005.019083.
Toumi, H., Best, T. M., Martin, A., Poumarat, G., Muscle plasticity after weight and combined (weight + jump) training. Med Sci Sports Exerc, 2004, 36(9), 1580-1588.
Doyle M, Reilly, T., Investigation of plyometric training in rugby league players, In: Reilly T, Clarys J., Stibbe A. (eds.), Science and football II. E & FN Spon, London 1993, 104-107.
Swanik, K. A., Swanik, C. B., Lephart, S. M., Huxel, K., The effect of functional training on the incidence of shoulder pain and strength in intercollegiate swimmers. J Sport Rehabil, 2002, 11(2), 140-154.
Blattner, S. E., Noble, L., Relative effects of isokinetic and plyometric training on vertical jumping performance. Res Q, 1979, 50, 538-588.
Yang, J. F., Winter, D. A, Electromyographic amplitude normalization methods: improving their sensitivity as diagnostic tools in gait analysis. Arch Phys Med Rehabil, 1984, 65(9), 517-521.
Robinson, M., Lees, A., Barton, G., An electromyographic investigation of abdominal exercises and the effects of fatigue. Ergonomics, 2005, 48(11-14), 1604-1612. DOI: 10.1080/00140130500101338.
Valkeinen, H., Häkkinen, K., Pakarinen, A., Hannonen, P., Häkkinen, A., Airaksinen, O., Niemitukia, L., Kraemer, W. J., Alén, M., Muscle hypertrophy, strength development, and serum hormones during strength training in elderly women with fibromyalgia. Scand J Rheumatol, 2005, 34(4), 309-314.