Health subject
Conditions
Interventions
A. Tea-derived food materials B. Placebo1 including caffeine C. Placebo2 Each food materials is taken for 2 weeks in the order of A, B, C, and a washout period of 2 weeks or more is set between eac
Sponsors
University of Tsukuba
Eligibility
Sex/Gender
Male
Inclusion criteria
Inclusion criteria: Healthy subject
Exclusion criteria
Exclusion criteria: Participants will be excluded from the experiment based on the following criterias. 1. Systolic blood pressure below 90mmHg 2. Currently participating or has participated in other experimental studies 4 weeks prior to the experiment day 3. Those that meet the following a. Diagnosed of heart, liver, or kidney disease b. Medical history in circulatory system diseases c. Diagnosed of diabetes d. Allergies to experimental food 4. Claustrophobic 5. Physician screened the individual out of the experiment 6. Under medication or consumes functional food and dietary supplements 7. Medical history with liver, kidney, or cardiac failures 8. Below 20 or above 60 years of age 9. Treated or currently being treated of sleep or mental disorder 10. Irregular lifestyle (Regular: sleep time between 9pm and 1am, wake time between 6am and 9am, 7-9 hours of sleep) 11. BMI less than 18.5 or greater than 25 12. Worked night shifts (after 10pm) 3 months prior to the experiment 13. Travel across time zones with time difference of 3 hours or more, 3 months prior to the experiment 14. Consumes alcohol regularly (40g (2 cans of beer) or more twice a week a more) 15. Smoker 16. Consumes more than 300mg (5 cups of 150mL) of coffee every day 17. MEQ score of less than 30 (extreme evening type) or greater than 70 (extreme morning type) 18. ESS score of greater than 11 19. PSQI score of greater than 5.5 20. Weighs less than 36.3kg 21. Diagnosed or suspected of intestinal atresia or poor functioning in the digestive tract 22. Problems with emissary 23. History of being conducted of gastrointestinal surgery 24. Plans on getting a nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI), or other procedures involving radio wave scans during the study period 25. Those who utilize implanted device such as a pacemaker The above exclusion criteria do not apply to those conducting this research.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Percent of sleep stages evaluated polysomnography, Energy expenditure | — |
Countries
Japan
Contacts
Public ContactToshio Kokubo
University of Tsukuba International Institute for Integrative Sleep Medicine (WPI-IIIS)
Outcome results
None listed