ABSTRACT
Objective@#To identify the 24-hour time allocation patterns of Mongolian junior school students, and to clarify the nature and degree of the influence of the time allocation patterns on the physical fitness of junior school students, so as to provide reference for optimizing and improving the scientific allocation of activity time of young students.@*Methods@#In October 2022, 1 389 Mongolian junior school students aged 13-15 from four schools in Xing an League of Inner Mongolia Autonomous Region were selected with stratified cluster sampling method. The 24-hour time utilization of students were collected by using the questionnaire of "China Time Utilization Survey (CTUS) Time Log in 2017" from October 21 to 22, 2022, and physical fitness was evaluated by using the test data of the National Student Physical Health Standard from September to November 2022. Students time allocation patterns were determined by Latent Profile Analysis with Mplus software, and the correlation between the time allocation patterns and the physical fitness was analyzed by multiple linear regression.@*Results@#The time allocation patterns of Mongolian junior school students could be classified into four types:learning type, screen type, diversity type, and sports type, and the population distribution were 24.7%, 18.3%, 9.9% and 47.1%, respectively. Among all gender and age groups, the sports type received highest total score physical fitness, followed by diversified type, learning type, and screen type ( F =72.25-154.94, P <0.01). The results of multiple regression analysis showed that gender, age, and time allocation patterns were significantly related to the total score of physical fitness ( P < 0.05 ). The total score of physical fitness in learning type, diversity type and sports type groups were all higher than that of screen type ( β =5.63, 12.86, 18.03, P <0.05). Moreover, the sports type showed highest effects on the total score of physical fitness, followed by the diversity type and learning type ( B =0.72, 0.31, 0.19, P <0.05).@*Conclusions@#There is a significant correlation between time allocation patterns and physical fitness of Mongolian junior school students, and those in sports type and diversity type of time allocation achieve better physical fitness, while those in learning type and screen type of time allocation shows relatively poorer physical fitness.In order to promote students physical fitness and healthy development, it is suggested to scientifically arrange students time allocation, increase physical activity time, and reduce sedentary activities that are detrimental to health.