Mental fatigue is an important factor affecting athletes’ performance. Explaining the effects of mental fatigue on sports performance from a theoretical point of view can help us deeply understand the interconnection between mental fatigue and sports performance and conduct effective interventions based on this. Combining the relevant literature in China and abroad reveals that the current academic theories on the mechanism of sports fatigue include motivational control theory, underload theory, neural waste disposal hypothesis, and resource depletion theory. The effects of mental fatigue on performance are reflected in aerobic endurance, sports decision-making, tactical performance, and technical performance. Current coping strategies for mental fatigue include physiological coping strategies based on nutrition (caffeine), odor, and noninvasive neuromodulation techniques and psychological and behavioral coping strategies based on music and positive thinking.

Objective: This study investigated the impact of mental fatigue on the temporal perceptual prediction of action recognition among boxers of different skill levels. Methods: A mixed experimental design of two (groups: Mental Fatigue Expert Group and Mental Fatigue Novice Group) × two (technique types: attack and defense) × three (time shields: −80 ms, −40 ms, and action start) was implemented. Twenty expert and novice boxers participated in this study. Mental fatigue was induced using a 45-min Stroop paradigm, and the effects were assessed using the VAS, Brog-20, BRUMS-F, and BRUMS-V. The experimental procedure for time perception was developed using E-prime 3.0, incorporating 36 videos depicting various attack and defense techniques, and reaction time and accuracy were recorded. Results: (1) A significant main effect on reaction time (RT) was observed (F (1,38) = 5.97, p < 0.05, η² = 0.14) but not on accuracy (ACC), suggesting a pronounced influence of mental fatigue on novice boxers’ temporal perceptual prediction in action recognition; (2) significant main effects of skill types were noted in both RT (F (1,38) = 9.03, p < 0.05, η² = 0.19) and ACC (F (1,38) = 18.496, p < 0.05, η² = 0.327), indicating disparities in the recognition of offensive and defensive skills under mental fatigue; (3) temporal shielding significantly influenced both RT (F (2,76) = 31.42, p < 0.05, η² = 0.45) and ACC (F (2,76) = 125.727, p < 0.05, η² = 0.768), with −80 ms showing a lower RT and ACC compared to −40 ms and action initiation; (4) second-order interaction effects were present in both RT (F (2,76) = 9.85, p < 0.05, η² = 0.21) and ACC (F (2,76) = 8.773, p < 0.05, η² = 0.188), with the RT interaction suggesting a negative impact on perceptual prediction at −80 ms and a faster offensive RT than defensive RT. The ACC interaction indicated that under mental fatigue, −40 ms approached and exceeded −80 ms in both offensive and defensive actions, with higher ACC in offense than defense; and (5) a third-order interaction effect among group, technique type, and time shielding on RT (F (2,76) = 3.92, p < 0.05, η² = 0.09) suggests that mental fatigue more significantly affects novice defensive technique RT than offensive technique. Conclusions: (1) The 45-min Stroop task effectively induced mental fatigue. (2) Mental fatigue negatively impacts both expert and novice boxers, with a more pronounced effect on experts’ defensive skills. (3) The −40 ms time perception is crucial for predicting action recognition as it approaches action initiation.