The midpoint of sleep is associated with dietary intake and dietary behavior among young Japanese women
Abstract
Objectives How human chronotype is correlated to nutrient and food-group intakes and dietary behavior remains to be elucidated. We cross-sectionally examined the association between the midpoint of sleep and these dietary variables in young Japanese women. A calculated halfway point between bedtime and rise time was used as midpoint of sleep.Methods The subjects were 3304 female Japanese dietetics students aged 18-20years from 53 institutions in Japan. Dietary intake during the previous month was assessed by a validated, self-administered diet history questionnaire. The midpoint of sleep was calculated using self-reported bedtimes and rise times.Results Late midpoint of sleep was significantly negatively associated with the percentage of energy from protein and carbohydrates, and the energy-adjusted intake of cholesterol, potassium, calcium, magnesium, iron, zinc, vitamin A, vitamin D, thiamin, riboflavin, vitamin B(6), folate, rice, vegetables, pulses, eggs, and milk and milk products. It was also significantly positively associated with the percentage of energy from alcohol and fat, and the energy-adjusted intake of noodles, confections, fat and oil, and meat. Furthermore, subjects with a later midpoint of sleep tended to begin meals later, eat for a longer time, skip meals more frequently, and watch TV at meals, not only at breakfast but also at lunch and dinner.Conclusions The midpoint of sleep is significantly associated with dietary intake of certain nutrients and foods and other dietary behaviors in young Japanese women. This finding may contribute to consider the relationships between chronotype and dietary intakes and behaviors.
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In a large-scale cross-sectional study of 3304 female dietetics students from 53 institutions in Japan, a late midpoint of sleep was associated with a lower percentage of energy from protein and carbohydrates and a lower intake of rice, vegetables, pulses, eggs, and milk products.
“A late midpoint of sleep was associated with a lower percentage of energy from protein and carbohydrates and a lower intake of rice, vegetables, pulses, eggs, and milk products (81).”
From Chronotype: Implications for Epidemiologic Studies on Chrono-Nutrition and Cardiometabolic Health (2019) · cites this paper as [81]
In that Japanese study of female dietetics students, a late midpoint of sleep was associated with a higher percentage of energy from alcohol and fat and higher intake of noodles, confectionery, fats and oils, and meat.
“It was, however, associated with a higher percentage of energy from alcohol and fat and higher intake of noodles, confectionery, fats and oils, and meat.”
From Chronotype: Implications for Epidemiologic Studies on Chrono-Nutrition and Cardiometabolic Health (2019) · cites this paper as [81]
Irregularity in timing of eating based on an individual's chronotype has also been reported in relation to timing of lunch.
“This irregularity in timing of eating based on an individual's chronotype has also been reported in relation to timing of lunch (76, 81).”
From Chronotype: Implications for Epidemiologic Studies on Chrono-Nutrition and Cardiometabolic Health (2019) · cites this paper as [81]
In a Japanese study, adults with an evening chronotype are more likely to skip meals more frequently and to have a higher probability of watching television at breakfast, lunch, and dinner.
“Consistent with the Finnish study, one study in Japan found that adults with an evening chronotype are more likely to skip meals more frequently and to have a higher probability of watching television at breakfast, lunch, and dinner (81).”
From Chronotype: Implications for Epidemiologic Studies on Chrono-Nutrition and Cardiometabolic Health (2019) · cites this paper as [81]
Previous studies have shown late chronotypes to have less healthful dietary habits.
“Consistent with these data, previous studies have also shown late chronotypes to have less healthful dietary habits and a tendency for a higher body mass index (BMI) [27, 77].”
From Smoking, screen-based sedentary behavior, and diet associated with habitual sleep duration and chronotype: data from the UK Biobank (2016) · cites this paper as [77]
Previous studies have shown late chronotypes to have a tendency for a higher body mass index.
“Consistent with these data, previous studies have also shown late chronotypes to have less healthful dietary habits and a tendency for a higher body mass index (BMI) [27, 77].”
From Smoking, screen-based sedentary behavior, and diet associated with habitual sleep duration and chronotype: data from the UK Biobank (2016) · cites this paper as [77]
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References 47 · Cited by 191
- Authors
- Sato-Mito, N., Sasaki, S., Murakami, K., Okubo, H., Takahashi, Y., Shibata, S., Yamada, K., & Sato, K.
- Affiliations
- The University of Tokyo (JP)
- Wayo Women's University (JP)
- Waseda University (JP)
- Japan Nutrition University (JP)
- Japan Women's University (JP)
- Corresponding author
- Sasaki, Satoshi
- ORCID
- Venue
- Sleep Medicine
- Publisher
- Elsevier BV
- Published
- 2011-03
- Volume
- 12
- Issue
- 3
- Pages
- 289-294
- ISSN
- 1389-9457 (ISSN-L)
- OpenAlex
- W2105196201
- Cited by
- 191
- References
- 47
- Citations by year
- 2026: 13 · 2025: 8 · 2024: 16 · 2023: 17 · 2022: 19 · 2021: 24 · 2020: 17 · 2019: 12 · 2018: 15 · 2017: 9 · 2016: 8 · 2015: 11 · 2014: 8 · 2013: 7 · 2012: 5
- FWCI
- 8.65
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Sleep Medicine (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
- Health Sciences › Nursing › Nutrition and Dietetics › Nutrition, Health and Food Behavior
- Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
- Keywords
- chronotype, dietary intake, dietary behavior, young women, Japanese women, meal timing, meal skipping, nutrient intake, food group intake, alcohol consumption, dietary fat intake
- MeSH terms
- Adolescent, Circadian Rhythm, Cross-Sectional Studies, Dietary Carbohydrates, Dietary Fats, Dietary Proteins, Eating, Energy Metabolism, Feeding Behavior, Female, Humans, Surveys and Questionnaires, Sleep, Television, Asian People, Young Adult
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