Does When You Exercise Matter? A Randomized Trial Comparing the Effect of Morning Versus Evening Aerobic Exercise on Weight Loss and Compensatory Behaviors
University of Colorado, Denver
Summary
The investigators are doing this study to learn more about how exercising at different times of the day (morning versus evening) affects body weight, sleep, eating patterns, and other factors.
Description
Does the time of day that exercise is performed matter for weight loss? The objective of this proposal is to examine the impact of an equivalent dose of morning vs. evening aerobic exercise on change in body weight, energy intake (EI) and components of energy expenditure (EE) in adults with overweight or obesity. Nearly two-thirds of US adults who attempt to lose weight report engaging in exercise as a primary strategy for weight loss. However, weight loss from exercise alone is often substantially less than predicted based on calories burned in exercise. This is due to compensatory changes th…
Eligibility
- Age range
- 18–55 years
- Sex
- All
- Healthy volunteers
- No
Inclusion Criteria: * Female or Male * Age 18-55 years * Body Mass Index 25-40 kg/m2 * Physically inactive: defined as self-reporting \<150 minutes per week of physical activity at moderate intensity or greater on a regular basis over the past 3 months. * No self-report of acute or chronic disease (cardiovascular disease (CVD), diabetes, gastrointestinal disorders and orthopedic problems in particular) * No plans to relocate within the next 15 months. * No plans for extended travel (\> 2 weeks) within the next 13 months * Live or work within 30 minutes of the Anschutz Health \& Wellness Cente…
Interventions
- BehavioralMorning Exercise
Morning Exercise will be instructed to perform 2000 kcal/wk of moderate to vigorous intensity aerobic exercise between the hours of 6 and 10 AM.
- BehavioralEvening Exercise
PM will be instructed to perform 2000 kcal/wk of moderate to vigorous intensity aerobic exercise between the hours of 3 and 7 PM.
Location
- University of Colorado Anschutz Medical CampusAurora, Colorado