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Effects of documentary watching and mental fatigue on maximal force production (A), and force steadiness (B). Illustration of force output at 25%, 50%, and 75% of MVC (C), and surface EMG activity for the FDS (flexor digitorum superficialis) muscle (D) for one individual participant. Data are presented as mean ± SEM (N = 14), and light grey bars indicate individual performance. $: Significant time-on-task effect (p < .05).
