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Prior investigations have shown measurable performance impairments on continuous physical performance tasks when preceded by a cognitively fatiguing task. However, the effect of cognitive fatigue on bodyweight resistance training exercise task performance is unknown. In the current investigation 18 amateur athletes completed a full body exercise task preceded by either a cognitive fatiguing or control intervention. In a randomized repeated measure design, each participant completed the same exercise task preceded by a 52 min cognitively fatiguing intervention (vigilance) or control intervention (video). Data collection sessions were separated by 1 week. Participants rated the fatigue intervention with a significantly higher workload compared to the control intervention ( p  < 0.001). Additionally, participants self-reported significantly greater energetic arousal for cognitively fatiguing task ( p  = 0.02). Cognitive fatigue did not significantly impact number of repetitions completed during the exercise task ( p  = 0.77); however, when cognitively fatigued, participants had decreased percent time-on-task (57%) relative to the no fatigue condition (60%;  p  = 0.04). RPE significantly changed over time ( p  < 0.001), but failed to show significant differences between the cognitive fatigue intervention and control intervention ( p  > 0.05). There was no statistical difference for heart rate or metabolic expenditure as a function of fatigue intervention during exercise. Cognitively fatigued athletes have decreased time-on-task in bodyweight resistance training exercise tasks.

Cognitive Fatigue Influences Time-On-Task during Bodyweight Resistance Training Exercise