Sustained intermittent and continuous isometric muscle actions induce different levels of fatigue for the same force-time integral.

Introduction: The aim was to compare the fatiguing effects induced by continuous (CONT) and intermittent (INT) tasks of an identical duration by equating the force-time integral.

Method: ː Fourteen men performed two sequences (4 blocks of 378s) of contractions (CONT or INT) of the quadriceps femoris. The CONT contraction of 378s corresponded to 10% of the maximum voluntary muscle contraction (MVC).