Plyometric training improves voluntary activation and strength during isometric, concentric and eccentric contractions

Journal of Science and Medicine in Sport
Martin BehrensSven Bruhn

Abstract

This study investigated effects of plyometric training (6 weeks, 3 sessions/week) on maximum voluntary contraction (MVC) strength and neural activation of the knee extensors during isometric, concentric and eccentric contractions. Twenty-seven participants were randomly assigned to the intervention or control group. Maximum voluntary torques (MVT) during the different types of contraction were measured at 110° knee flexion (180°=full extension). The interpolated twitch technique was applied at the same knee joint angle during isometric, concentric and eccentric contractions to measure voluntary activation. In addition, normalized root mean square of the EMG signal at MVT was calculated. The twitch torque signal induced by electrical nerve stimulation at rest was used to evaluate training-related changes at the muscle level. In addition, jump height in countermovement jump was measured. After training, MVT increased by 20Nm (95% CI: 5-36Nm, P=0.012), 24Nm (95% CI: 9-40Nm, P=0.004) and 27Nm (95% CI: 7-48Nm, P=0.013) for isometric, concentric and eccentric MVCs compared to controls, respectively. The strength enhancements were associated with increases in voluntary activation during isometric, concentric and eccentric MVCs by 7.8%...Continue Reading

References

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Jan 6, 2015·European Journal of Applied Physiology·Martin BehrensSven Bruhn

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Citations

Dec 25, 2015·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Martin BehrensWilfried Alt
Mar 14, 2018·Journal of Strength and Conditioning Research·Andrew J Kossow, William P Ebben
Oct 3, 2018·Journal of Strength and Conditioning Research·Mehrez HammamiMohamed Souhaiel Chelly
Feb 23, 2019·Journal of Strength and Conditioning Research·Dariusz MroczekJan Chmura
Jul 26, 2016·Experimental and Therapeutic Medicine·Ying-Chun Wang, Na Zhang
Jan 1, 2021·Neuroscience and Biobehavioral Reviews·Tibor HortobágyiDavid Colomer-Poveda
Oct 31, 2020·International Journal of Environmental Research and Public Health·Mehrez HammamiMohamed Souhaiel Chelly

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