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It has been pointed out that Japanese university students have several problems from psychological and social points of view due to their evening-typed life. For university athletes, evening-typed life is afraid to promote reduced quality of performance and high risk to be injured during training and match. This study tries to investigate the relationship among circadian typology, sleep habit, physical and mental health and meal habit from epidemiological view point. An integrated questionnairedoi:10.4236/psych.2015.612153 fatcat:56beiu62tne2rb6ebkna64vaeu