抄録
Objective of this study is to evaluate the effects of intervention, as asking Japanese university students to get foods including protein and Vitamin B6 (especially recommending fermented soy-beans and banana) at breakfast and to be exposed to sun-lights after that for one month (October-November, 2008), on sleep-wake cycle during the intervention. Participants of 83 attending university soccer-club were divided to three groups (G1: no intervention; G2: asking them to have protein resources and Vitamin B6 resource at breakfast; G3: asking them to do as G2 plus sun light exposure after breakfast). Sleep diary was noted by themselves through one month of intervention period to evaluate the effects of it. Phase advance tended to be shown at all 4 phase points (bed time, sleep-in time, med-point of sleep, wake-up time) in the last week, period of intervention month only in G3 (P=0.100,0.148,0.070,0.148). The integrated intervention to breakfast and the following light exposure might be effective for evening-typed Japanese students to be shifted to be more morning-typed only within 2-4 weeks.
