Παρασκευή 8 Φεβρουαρίου 2019

Monitoring Muscle Fatigue Progression during Dynamic Exercise

Purpose To develop and validate a novel model for assessment of peripheral fatigue progression during dynamic exercise. Methods Seven males and four females (24 ± 3 yrs) completed one-legged knee-extensor exercise at 40% of peak power output for 12 min (40%PPO). Additionally, an exhaustive bout lasting ~ 6 min (84 ± 2% PPO; 59 ± 10 watt) was contrasted to two bouts completed at ± 5% of the target workload. Trials were completed in randomized order. Percutaneous electrical stimulation of m. vastus lateralis during the passive knee-flexion phase allowed quantification of maximal twitch force every 30 s in parallel with rating of perceived exertion (RPE). Results Elicited twitch force remained unchanged during the 40%PPO trial. During the three exhaustive bouts, exercise differed in duration (561 ± 154 s, 366 ± 64 s, 245 ± 61 s; P

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