Healthy people
Conditions
Interventions
No breakfast until noon for 4 weeks
Breakfast (450kcal) for 4 weeks
Sponsors
Hiroshima University
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Healthy adults aged 18 years or older and under 40 years Individuals who do not have a habit of eating breakfast (defined as those who, on at least five days per week, typically consume only snacks, fruits, dairy products, or beverages in the morning; only nutrient supplements or energy drinks; or consume nothing at all in the morning) Individuals who maintain generally regular eating and sleeping habits Individuals who are able to participate during the specified study period and visit the laboratory on the designated days Individuals who can download and use the required mobile application on their own smartphone
Exclusion criteria
Exclusion criteria: Individuals engaged in shift work or night work Individuals with extremely irregular daily routines Individuals who regularly use sleeping medications or sleep supplements Individuals with allergies to any of the following foods: wheat, eggs, milk, soy, or walnuts
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Core Body Temperature Rhythms | — |
Secondary
| Measure | Time frame |
|---|---|
| Salivary melatonin levels aMT6s in the first morning urine sample Sleep and activity levels measured by Fitbit Changes in morning performance OSA Sleep Questionnaire Meal timing | — |
Countries
Japan
Contacts
Public ContactYu Tahara
Hiroshima University Graduate School of Biomedical and Health Sciences
Outcome results
None listed