Dietary factors influencing the associations between fluctuations in the 24-hour pattern of sleep-wake cycle and health status

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K19720
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 59040:Nutrition science and health science-related
• Research Institution: Toyo University
• Principal Investigator: Yoshizaki Takahiro 東洋大学, 食環境科学部, 准教授 (50732830)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 睡眠-覚醒リズムの日間類似性 / 食事の質 / 食事のタイミング / アクチグラフ

Outline of Final Research Achievements

Our study focused on the discrepancy between the sleep-wake cycle and the internal clocks, which is caused by irregular lifestyles and social time constraints. The objective was to investigate the lifestyle-related characteristics of healthy young individuals with lower interdaily stability (IS) of their sleep-wake cycle. Additionally, the study aimed to elucidate the associations between IS, mental and physical health, and to explore dietary factors that could influence these associations. As a result, the lifestyle-related characteristics among those with lower IS of the 24-hour patterns of sleep-wake cycles and the associations with mental and physical health were clarified. Furthermore, it was suggested that the associations between lower IS of the 24-hour patterns of sleep-wake cycles and poor subjective health or lower sleep quality might be partially modified by daily fluctuations in meal timing and the ratios of energy intake at breakfast, lunch, and dinner.

Free Research Field

応用健康科学

Academic Significance and Societal Importance of the Research Achievements

日常生活の不規則さは様々な社会的環境要因による時間的制約が背景となっており、個人の努力や集団レベルの健康施策による早期改善は容易ではない。本研究で得られた睡眠-覚醒リズムの24時間パターンの日間類似性が低いことによる健康影響は、生活リズムの乱れといった類似の指標を曝露とした先行研究の結果と一致している。また、本研究ではそれらの関連の一部に影響し得る食習慣の特徴を明らかにした。そのため、本研究で得られた知見は、不規則な生活にならざるを得ない集団における健康維持増進に向け、食習慣に注目した新たな対応策として有用な基礎資料となり得ると考えられる。