Mechanical, electromyographical and biochemical variables after a fatiguing task in endurance and power-trained athletes

This worked aimed to identify, among mechanical, electromyographic and biochemical variables, those promising to be correlated with muscle characteristics of different athletes. Twenty subjects trained for power and endurance disciplines were studied before and after an isokinetic fatiguing exercise. Torque values, EMG variables estimated from signals recorded in both voluntary and electrically elicited isometric contractions and cortisol and lactate responses were compared to highlight possible correlations. Results allow to identify the rate of torque decrease during the isokinetic exercise and among different trials of isometric exercises, the lactate production and the recovery times of muscle fiber conduction velocity as the variables able to best distinguish between the two groups of athletes.