Loss of neuromuscular complexity with neuromuscular fatigue During submaximal contractions performed to the limit of tolerance, maximal force generating capacity decreases, consequent to central and peripheral perturbations (Gandevia, 2001). This loss of force generating capacity necessitates an increase in the number of activated motor units and their firing frequency in order to sustain the demands of a submaximal task (Adam & De Luca, 2005; Carpentier et al., 2001).