Abstract: Objective To understand the relationship between the development of college students' early exercise activities, study fatigue and mental work ability, provides the necessary theoretical basis and reference for promoting the physical and mental health of college students and promoting the healthy development of early exercise activities in higher vocational colleges. Methods A total of 102 students were randomly divided into the intervention group (early exercise group) and the control group (early exercise group). The study fatigue and mental work ability curve of different periods of the whole day were measured by dose exercise test (school word method), and the possible influencing factors of study fatigue were investigated with a self-designed questionnaire. Results After 4 weeks of intervention, there were statistically significant differences in morning work speed, error rate and IMC index between the intervention group and the control group (P<0.05). The IMC index of both groups was the highest before class 1 and class 5, and the lowest after class 4 in the morning and class 8 in the afternoon. Conclusion Study fatigue is common among medical students in this school. Early exercise can improve students' mental work ability, especially the study state and study fatigue in the morning.

Key words: Early exercise, Ability to work mentally, Fatigue, Dose work test