Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (23): 3722-3728.doi: 10.3969/j.issn.2095-4344.1229

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Factors influencing physical health of college students analyzed by random forest model: questionnaires of 568 students from Tongji University 

Feng Min1, Feng Hui1, Zhang Yiyu2, Wang Lejun1   

  1.  (1Physical Education Department, 2School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China)
  • Received:2018-11-29 Online:2019-08-18 Published:2019-08-18
  • Contact: Feng Hui, Lecturer, Physical Education Department, Tongji University, Shanghai 200092, China
  • About author:Feng Min, Master, Associate professor, Physical Education Department, Tongji University, Shanghai 200092, China

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Abstract:

BACKGROUND: Factors affecting physique of college students are various, factors correlate with each other directly or indirectly, and many hidden factors are neglected usually. There are many studies summarizing the influencing factors, but the influence at different dimensions is little reported.
OBJECTIVE: To analyze the influencing factors of physical health of college students with random forest model. 
METHODS: Totally 568 college students from Tongji University were surveyed using questionnaires, including Godin Leisure-Time Exercise Questionnaire, expectancy-value, achievement goal, theory of planned behavior, health related quality of life, sedentary behavior, simplified depression CES-D, Pittsburgh sleep quality index, and diet (self-made) and combine with physical fitness test scores, such as height, body mass, lung capacity, sit and reach, 1-minute sit-up (female), pull-up (male), 50 and 800-m (female) and 1 000-m standing broad jump. Firstly, we reduced dimensions of influence factors using random forest model. Then, the correlation among the dimensionality reduction variable was analyzed by Pearson relativity to find the important influence factor and their interactions.
RESULTS AND CONCLUSION: (1) Sports motivation was a very important factor to influence college fitness health. (2) Psychosocial factor of health related quality of life was a very important factor to influence college psychological health. (3) Physical activity every week influenced directly fitness and psychological health. (4) The cost (included in Expectancy-value theory) factor was usually ignored, and the intention factor influence directly perceived behavior control. (5) In summary, sports motivation is the most important factor to affect body fitness, especially inner motivation. The study on cost needs to be studied in depth. The depressive tendency ratio is becoming high in college students, and mental health intervention cannot be ignored. Interventions can be made through health related quality of life and physical activity every week.

Key words: physical health of college students, random forest model, questionnaire, health related quality of life, physical activity every week, sedentary behavior, sports motivation, behavior, perceived behavior control

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