Rate of force development as a measure of muscle damage
John Wiley and Sons, Ltd
Faculty of Health, Engineering and Science
School of Exercise and Health Sciences / Centre for Exercise and Sports Science Research
This study tested the hypothesis that rate of force development (RFD) would be a more sensitive indirect marker of muscle damage than maximum voluntary isometric contraction (MVC) peak torque. Ten men performed one concentric cycling and two eccentric cycling (ECC1, ECC2) bouts for 30min at 60% of maximal concentric power output with 2 weeks between bouts. MVC peak torque, RFD, and vastus lateralis electromyogram amplitude and mean frequency were measured during a knee extensor MVC before, immediately after and 1-2 days after each bout. The magnitude of decrease in MVC peak torque after exercise was greater (P100-200) decreased (P100-200 was 7-19% greater than that of MVC peak torque after ECC1 (P100-200 is a more specific and sensitive indirect marker of eccentric exercise-induced muscle damage than MVC peak torque.