Motor Unit Discharge Rates During Maximal Fatiguing Eccentric Contractions and Recovery in the Human Elbow Extensors

This study provides a novel characterization of motor unit behavior during fatigue induced by maximal ECC contractions, revealing a significant reduction consistent with prior evidence of impaired MUDR under other fatiguing tasks. In addition, results indicate that prolonged torque depression (30 min post-task failure) following the ECC fatiguing task is primarily attributable to peripheral muscle impairments, as MUDR recovered to baseline within ~10 min.