Effect Of Plyometric Training On Vertical Jump Performance And Neuromuscular Adaptation In Volleyball Player
<p class="Style">The purpose of this study was to examine the effectiveness of 12-week plyometric training on vertical jump performance (Vj), maximal surface EMG, M-wave amplitude, Mwave latency, and nerve conduction velocity (NCV) in men volleyball player. Thirty junior high school volleyball players' volunteers (age: 17.53 0.74; Height: 177.67 3.14; Weight: 61.31 5.32) were divided into plyometric training [PT] (n=15) and control group</p><p class="Style">[c] (n=15). PT group trained so.w' but C group didn't participate in this training. Both groups were pre- and post tested in EMG, M-wave parameters, NCV and Vj test. Tow way ANOVA (group*time interaction) and Bonferroni post hoes test demonstrated significant differences (P<0.05) in PT group of pre to post test in VJ performance (9.67 %) and in M-wave latency 16.55 % t ; nerve conduction velocity 14.19 % t ; there is no significant differences in IEMG (4.6 5 % J, ) and M-wave amplitude (20.91 % t ), but there is no significant improvement during this period in control group. Comparison between groups after 12wk showed that there was a significant improvement in Latency (16.74 % J,) and NCV (19.10% t ) in PT group during the course of the study than C group (P<0.05). based on the results of this study, it is possible to conclude that coaches and trainers consider PT as a strategy for increasing volleyball players' explosive performance that this may have taken place in neuromuscular responses such as; optimizing motor unites (MU) pattern, optimizing MUs recruitment, augmentation in nerve conduction velocity, decrement in reflex excitability of the motor pool.</p>
Aagaard, P., E. B. Simsonsen, J. L. Andersen, S. P. Magnusson, J. Halkjaer-Kristensen, and P. Dyhrepolsen, (2000) Neural inhabitation during maximal eccentric and concentric quadriceps contraction: effect of resistance training. J. Appl. Physiol. 89: 2249-2257.
Aleida-Silveira M. I., Perto, C., and Goubel F., (1996) Nerumascular adaptations in rats trained by muscle strength shirtening. Eur. J. Appl. Physiol. 72: 261-266.
Bauer, T., R.E. Thayer, & G. Baras,. (1990). Comparison of training modalities for power development in the lower extremity. J. Appl. Sport Sci. Res., 4, 115-121.
Bobbert, M.F. (2001) Dependence of human squat jump performance on the series elastic compliance of the triceps surae: a simulation study. Journal of Experimental Biology 204(pt 3): 533-542.
Bobbert, M.F., Gerritsen, K.G., Litjens, M.C. and Van Soest A.J. (1996) Why is countermovement jump height greater than squat jump height? Med. Sci. Sport & Exer. 28:1402-1412.
Casabona A., Polizzi M. C., and Perciavalle V., (1990) Differences in H-reflex between athletes trained
Chu, D.A. (1996). Explosive Power and Strength. Champaign, IL: Human Kinetics.
Clarkson P. M., Kroll W., and McBride T. C. (1980) Plantar flexor fatigue and muscle fiber type in power and endurance trained athletes. Med. Sci. Sports Exerc. 12: 262-267.
Cronin, J. B., P.J. McNair and R.N. Marshall. (2000) The role of maximal strength and load on initial power production. Med. Sci. Sport & Exer. 3:1763-1769.
Fatouros, I. G., Athanasios Z. J., D. Leontsini, Kyriakos T., N. Aggelousis, N. Kostopoulos, & P. Buckenmeyer,. (2000). Evaluation of Plyometric Exercise Training, Weight Training, and Their Combination on Vertical Jumping Performance and Leg Strength. J. Strength Condo Res., 14(4), 470-476.
Hakkinen K., M. Alen, W. J. Kraemer, E. Gorostiaga, M Izquierdo, H. Rusko, J. Mikkola, A. Hakkinen, H Valkeinen, E. Kaarakainen, S. Romu, V. Erola. J. Athianen, and L. Paavolanien, (2003) Neuromuscular adaptation during concurrent strength and endurance training versus strength training. Eur. J. Appl. Physiol. 89: 42-52.
Hakkinen K., Kallinen M., Izqierdo M., Jokelainen K, Lassila H., et al. (1998) Change in agonist-antagonist EMG, muscle CSA and and force during strength training in midel-aged and older people. J Appl. Physiol. 84: 1341-1349.
Hoppeler H. (1988) Exercise-induced structural changes of skeletal muscle. Atlas Sci. Biochem. 2: 247-255.
Ikai, M. and T. Fukunaga, (1970) A study on training effects on strength perunit cross-sectional area of muscle by means of ultrasonic measurement. Eur. J. Appl. Physiol. 28: 173-180.
Kamen, G., Taylor, P., and Beehler P. J., (1984) Ulnar and posterior nerve conduction velocity in athelets. Int. J. Sports Med. 5(1): 26-30.
Kilani, H. A., S. S. Palmer, M. J. Adrian, and J. J. Gapsis. (1989) Block of the stretch reflex of vastus lateral is during vertical jump. Hum. Mov. Sci. 8:247-269.
Lubbers, P. E., Jeffrey A. P., Mathew W. H., John P. T., Michael J. C., & Robert H. L.,(2003) Effects of Plyometric Training and Recovery on Vertical Jump Performance and Anaerobic Power .. J. Strength Cond., Res., 17(4), 704-709.
Moritan, T. and H. A. Deveries, (1979) Neural factor vs hypertrophy in time course of muscle strength gain. Am. J. Physiol. Med. Rehabil. 58: 115-130.
Maffiuletti, N. A., A. Martin, N. Babault, M. Pensini, and M. Schieppati. (2001) Electrical and mechanical H- to M max ratio in power and endurance -trained athletes. J Appl. Physiol. 90: 3-9. Perto, C., Goubel, F., and Mora, I., (1991) Quantification of T and H responses before and after a period of endurance training. Eur. J. Appl. Physiol. 63: 368-375.
Rahimi, R., & Behpur, N. (2005). The effects of plyometric, weight and plyometric-weight training on anaerobic power and muscular strength. Physical Education and Sport, 3 (1), 81-91.
Rich, C. and E. Cafarelli. (2000) Submaximal motor unit firing rates after 8 wk of isometric resistance training. Med. Sci. Sports Exerc., 32, No.1, pp. 190-196.
Rochcongar P., Dassonvill J. and Le Bars R. (1979) Modification of the Hoffmann reflex in function of athletic training. Eur. J. Appl. Physiol. 40: 165-170.
Safrit, M.J. (1990). Introduction to Measurement in Physical Education and Exercise Science (2nd ed.). St Louis: C.V Mosby Company,
Tillman M. D., Chris J. Hass, Denis Brunt and Gregg R. Bennett. (2004) Jumping and landing techniques in elite women's Volleyball, Journal of Sports Science and Medicine 3, 30-36.
Viitasalo J.T. and P.V. Komi. (1981). Interrelationships between electromyographic, mechanical, muscle structure and reflex time measurements in man. Acta Physiologica Scandinavica 111: 97-103.
Walshe, A. D., G. J. Wilson, and Gertjan J. C. Ettma. (1998)Stretch-shortening cycle compared with isometric preload contributions to enhanced muscular performance, J. appl. Physiol. 84(1): 97-106.1998.
Westgaard RH and De Luca CJ. (1999) Motor unit substitution in long-duration contractions of the human trapezius muscle. J Neurophysio/82: 501-504.
Wilson, Greag, (1994) Strength and power assessment. Apllied Anatomy and Biomechanics in Sport. Blackwell Science.