Effects of fasted exercise timing on energy intake
Effects of Fasted Morning vs. Evening Exercise on Post-Exercise Energy Intake
This study tests whether exercising on an empty stomach in the morning or evening affects how much food people eat right after and throughout the day.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 25 (estimated) |
| Ages | 18 Years to 30 Years |
| Sex | All |
| Sponsor | Technical University of Munich Academic / other |
| Locations | 1 site (Munich, Bayern) |
| Trial ID | NCT06947824 on ClinicalTrials.gov |
What this trial studies
This trial investigates how the timing of fasted exercise, either in the morning or evening, affects energy intake immediately after and over a 24-hour period. Participants will engage in three different fasted exercise sessions on a treadmill, with each session separated by a week. The study will measure total energy intake during a post-exercise meal and assess subjective appetite ratings at various intervals. Healthy men and women aged 18-30 years will be recruited to complete the study in a randomized order.
Who should consider this trial
Good fit: Ideal candidates are healthy men and women aged 18-30 with a BMI between 18.5 and 30.0 kg/m2 who can exercise vigorously.
Not a fit: Patients who are pregnant, breastfeeding, or have a history of eating disorders may not benefit from this study.
Why it matters
Potential benefit: If successful, this study could help optimize exercise timing for better energy management and appetite control.
How similar studies have performed: While the specific timing of fasted exercise is less commonly studied, related research on exercise and energy intake has shown promising results.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * BMI of 18.5.0-30.0 kg/m2 * weight stability (≤2.5 kg weight change during the past 3 months) * ability to exercise at a vigorous intensity for 30 minutes Exclusion Criteria: * pregnancy or breastfeeding * smoking * history of or current eating disorders * medical condition or use of medication that could affect appetite or pose any contraindications to exercise As the menstrual cycle can cause fluctuations in food cravings and appetite, women of childbearing age were only eligible if they used hormonal contraceptives. To ensure constant exposure to exogenous estrogen and progestin throughout the study phase, participating women were further asked to use active hormone pills throughout the study period in both studies, a practice that is considered both safe and efficacious. -
Where this trial is running
Munich, Bayern
- Technical University of Munich — Munich, Bayern, Germany (Recruiting)
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.