Abstract
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 questionnaire was administrated to 120 men athletes attending university soccer club in November 2013 and 62 ones answered it correctly. The questionnaire included the diurnal type scale which is constructed by Torsvall & ?kerstedt (1980) and questions on sleep habits and mental health, SOC scale (SOC3- UTHS) and FFQ scale. Morning-typed students showed higher quality of sleep (p = 0.015) and they tended to have higher SOC scores (p = 0.071) than the other chrono-types. Evening-typed students took higher amount of carbohydrates than the other types (p = 0.048). Circadian typology might be related to not only sleep health but also the nutritional characteristics and psychological responses to social stress in Japanese university athletes.
Highlights
Since 1980s, the sports nutrition boom has continued to produce many kinds of appealing products as supporting the nutrition consume by the athletes which contribute to the nutritional complete and improved performance to some extent (Ryan-Krause, 1998)
The most important supply of nutrition for athletes is due to the meals, especially breakfast which is the key to serotonin and melatonin synthesis in the pineal of them (Harada et al, 2013a, b)
This study aims to clarify the relationship among the circadian typology, sleep habit, mental and physical health and meal habit in an integrated manner in Japanese university athletes from epidemiological view point
Summary
Since 1980s, the sports nutrition boom has continued to produce many kinds of appealing products as supporting the nutrition consume by the athletes which contribute to the nutritional complete and improved performance to some extent (Ryan-Krause, 1998). Supplements made from milk are powerful for supporting athletes to intake protein which includes furosine, a well-known index for the availability of lysine (Rufián-Henares et al, 2007). Sports supplements made from milk were reported as “tryptophan” resource by Delgado-Andrade et al (2006). The most important supply of nutrition for athletes is due to the meals, especially breakfast which is the key to serotonin and melatonin synthesis in the pineal of them (Harada et al, 2013a, b). There are few reports on the relationship between circadian type (chronotype) and sleep health and meal habits in the athletes
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