Fig. 1

Experimental Protocol. The top panel illustrates the order in which the tasks were performed. The Mini-Cog^TM test was performed before the baseline to screen for cognitive impairment. Maximum voluntary contractions (MVC; solid bars) were performed at the beginning of data collection and immediately after the fatiguing contraction. Participants underwent a 60-min control condition (watching documentary) and cognitive fatigue condition (Stroop Color Word and 1-Back tests) that were counterbalanced on two separate days. POMS fatigue responses were obtained before and after the 60-min task to assess perceived cognitive fatigue levels. Following the 60-min task, participants performed intermittent submaximal handgrip fatiguing exercise at 30 % MVC (hashed rectangle) until volutnary exhaustion