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Med Sci Sports Exerc. 2013 Jul;45(7):1323-30. doi: 10.1249/MSS.0b013e3182874c0e.

Further potentiation of dynamic muscle strength after resistance training.

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Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan.



One bout of 5-6 s of maximal voluntary isometric contraction (MVC) is known to enhance subsequent dynamic joint performance such as dynamic joint torque and power with maximal voluntary effort. On the other hand, such a muscle contraction can also induce muscle fatigue. It is then possible that individual differences in fatigue resistance is a factor that affects the balance between potentiation and fatigue. Here, we examined the effect of chronic heavy-resistance training on the extent and time course of the potentiation of maximal voluntary dynamic torque.


Before and after a 12-wk intervention, maximal voluntary concentric knee extension torque at 210° · s(-1) was measured in the following sequence: before and immediately after a 5-s MVC of knee extension and 1, 3, and 5 min thereafter. The training group performed heavy-resistance training exercise of knee extension consisting of five sets of eight repetitions with 80% of one-repetition maximum, three sessions a week during the intervention period.


Before the resistance training intervention, maximal voluntary concentric torque was significantly enhanced only at 1 and 3 min post-MVC. After the 12-wk resistance training, the maximal voluntary concentric torque was potentiated also immediately after the conditioning MVC and was further increased at 1-min point.


These findings indicate that the contraction-induced potentiation of maximal voluntary dynamic torque is pronounced in strength-trained individuals.

[Indexed for MEDLINE]

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