Healthy subjects
Conditions
Interventions
L-theanine 200mg/day for 2weeks
dextrin
Sponsors
Hiroshima University
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: (1) Workers between the ages of 18 and 59. 2) Those who have social jet lag of 1.5 hours or more and usually feel sleep deprived (social jet lag indicates the difference in median sleep time on weekdays and weekends). (3) Those who have weekends off and work on weekdays. (iv) Those who are able to participate in the study during the period specified here. (5) Those who can submit the results of medical examinations taken within the past year.
Exclusion criteria
Exclusion criteria: (1) Those who regularly use sleeping pills or sleeping supplements 2) Persons who are regularly using medications (drugs that affect metabolism, such as diabetes medications, alpha-blockers, beta-blockers, etc.) (iii) Those who have diseases that affect metabolism (diabetes, thyroid function, liver disorder, renal disorder) (iv) Those with a diagnosis or history of psychiatric disorders (v) Those who use pacemakers or other implantable medical devices (6) Persons with serious cardiovascular disease (7) Patients with cancer (8) Those with a history of gastrointestinal surgery (mainly pharynx, esophagus, stomach, duodenum, small intestine, colon, rectum, cecum, pancreas, and liver are applicable. However, appendicectomy is acceptable) (ix) Those who have knee or back disease and have difficulty in performing their duties. (10) Pregnant women, nursing mothers, and those planning to become pregnant. (11) Those with extremely irregular eating habits. (12)Exercisers who have an exercise habit (average of 60 minutes/day or more) (13)Participating or intending to participate in trials involving the ingestion of other foods, the administration of drugs, or the application of cosmetics, drugs, etc. (14)Persons who are unable to put apps on their cell phones (lifestyle recording apps are used in the study) (15) Those who have a daily nap habit of at least 30 minutes (16)Permanent teleworkers or those who work shift work or night shifts at least one day per week (17)Persons who snore frequently or suffer from sleep apnea
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Difference in sleeping and waking times on weekdays and weekends (social jet lag) | — |
Secondary
| Measure | Time frame |
|---|---|
| Changes in sleep quality, anxiety and stress, and body temperature rhythms | — |
Countries
Japan
Contacts
Public ContactYu Tahara
Hiroshima University Department of Public Health and Health Policy
Outcome results
None listed