Time-of-Day Effects of Fasted Exercise on Energy Intake
NCT ID: NCT06947824
Last Updated: 2026-02-06
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
35 participants
INTERVENTIONAL
2025-04-01
2025-12-15
Brief Summary
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
CROSSOVER
BASIC_SCIENCE
NONE
Study Groups
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Fasted Morning Exercise (12h AMEx)
Exercise will take place in the morning, following a 12h overnight fast
Fasted Morning Exercise (12h)
A 30-minute exercise session will take place on a treadmill in the morning (7:00, \~1h after participants' habitual wake-up time), after a 12h overnight fast. The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Fasted Evening Exercise (6h PMEx)
Exercise will take place in the evening, following a 6h period of fasting
Fasted Evening Exercise (6h)
A 30-minute exercise session will take place on a treadmill in the evening (19:00, exactly 12 hours after the morning session), after a 6h fasting period. The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Fasted Evening Exercise (12h PMEx)
Exercise will take place in the evening, following a 12h period of fasting
Fasted Evening Exercise (12h)
A 30-minute exercise session will take place on a treadmill in the evening (19:00, exactly 12 hours after the morning session), after a 12h fasting period. The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Fed Morning Exercise (AMEx Fed)
Exercise will take place in the morning after consuming a small snack (30 min before exercise)
Fed Morning Exercise (AMEx Fed)
A 30-minute exercise session will take place on a treadmill in the morning (7:00, \~1h after participants' habitual wake-up time), after consuming a small pre-exercise snack (30 min before exercise). The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Fed Evening Exercise (PMEx Fed)
Exercise will take place in the evening after consuming a small snack (30 min before exercise)
Evening Fed Exercise (PMEx Fed)
A 30-minute exercise session will take place on a treadmill in the evening (19:00, exactly 12 hours after the morning session), after consuming a small pre-exercise snack (30 min before exercise). The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Interventions
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Fasted Morning Exercise (12h)
A 30-minute exercise session will take place on a treadmill in the morning (7:00, \~1h after participants' habitual wake-up time), after a 12h overnight fast. The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Fasted Evening Exercise (6h)
A 30-minute exercise session will take place on a treadmill in the evening (19:00, exactly 12 hours after the morning session), after a 6h fasting period. The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Fasted Evening Exercise (12h)
A 30-minute exercise session will take place on a treadmill in the evening (19:00, exactly 12 hours after the morning session), after a 12h fasting period. The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Fed Morning Exercise (AMEx Fed)
A 30-minute exercise session will take place on a treadmill in the morning (7:00, \~1h after participants' habitual wake-up time), after consuming a small pre-exercise snack (30 min before exercise). The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Evening Fed Exercise (PMEx Fed)
A 30-minute exercise session will take place on a treadmill in the evening (19:00, exactly 12 hours after the morning session), after consuming a small pre-exercise snack (30 min before exercise). The session will consist of 30 minutes of steady state cycling at 65% of VO2max, following a 5 min warm-up.
Eligibility Criteria
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Inclusion Criteria
* weight stability (≤2.5 kg weight change during the past 3 months)
* ability to exercise at a vigorous intensity for 30 minutes
Exclusion Criteria
* 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.
\-
18 Years
30 Years
ALL
Yes
Sponsors
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Technical University of Munich
OTHER
Responsible Party
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Karsten Koehler
Prof. Dr. Karsten Köhler
Locations
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Technical University of Munich
Munich, Bavaria, Germany
Countries
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Other Identifiers
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MvE_FastEx
Identifier Type: -
Identifier Source: org_study_id
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