Relationships between current and past exercise habits and chronotype and body composition among female university students
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Abstract
The present cross-sectional study investigated relationships between past and current exercise habits, body composition, and chronotypes in female university students. Physical activity, Morningness-Eveningness Questionnaire (MEQ) scores and body composition were assessed in 251 students. Participants were asked about their current exercise habits and in high school habits; each measure was compared among students with consistent exercise habits since high school (EX-EX, n = 84), those with exercise habits only in high school (EX-NO, n = 81), and those without consistent exercise habits since high school (NO-NO, n = 86). The MEQ scores of NO-NO were significantly lower than those of EX-EX and EX-NO, and approximately 40% of NO-NO were of the evening type. However, the MEQ scores were not significantly different between EX-EX and EX-NO. Furthermore, about 51% of NO-NO had body fat ≥30% even with a normal range of body mass index, which was proportionately higher than in the other groups. These results suggest that students who had an exercise habits in high school did not show differences in chronotypes owing to their current exercise habits. However, students without consistent exercise habits since high school may be associated with the late chronotype and higher prevalence of normal weight obesity.
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