Power output, mechanomyographic, and electromyographic responses to maximal, concentric, isokinetic muscle actions in men and women.

摘要: The purpose of this study was to examine the responses peak torque (PT), mean power output (MP), mechanomyographic (MMG) and electromyographic (EMG) amplitudes, frequencies (MPFs) vastus lateralis (VL), rectus femoris (RF), medialis (VM) in men women during dynamic muscle actions. Twelve (mean +/- SD age = 22 3 years) 11 (22 performed maximal, concentric, isokinetic leg extensions at velocities 60, 120, 180, 240, 300 degrees x s(-1) on a Cybex 6000 dynamometer. Piezoelectric MMG-recording sensors bipolar surface EMG electrodes were placed over VL, RF, VM muscles. No sex-related differences found among velocity-related patterns for PT, MP, MMG amplitude, MPF, or MPF. There were, however, amplitude across velocity. results indicated similar increase MP all muscles VL women. Velocity-related decreases (p 0.05) MPF increased < only between 240 s(-1). Overall, these findings suggested that there sex- muscle-specific, associations motor unit activation strategies (EMG MPF) mechanical aspects muscular activity (MMG MPF). With additional examination validation, may prove useful practitioners monitoring training-induced changes output.