Morning Exercise for Obesity

University of Colorado Anschutz Medical Campus, Aurora, CO
ObesityMorning Exercise - Behavioral
18 - 55
All Sexes

Study Summary

This trial is testing the effects of morning versus evening exercise on weight, sleep, and eating habits.

Eligible Conditions
  • Overweight and Obesity

Treatment Effectiveness

Phase-Based Effectiveness

1 of 3

Study Objectives

1 Primary · 9 Secondary · Reporting Duration: Baseline (0) - 13 Months

Month 13
Aspects of Eating Behavior
Fat Mass
Food Cravings
Hunger and Satiety
Lean Mass
Non-Exercise Physical Activity (NEPA)
Sedentary Time
Weight Change (kg)
Month 7
Energy Intake
Total Daily Energy Expenditure

Trial Safety

Phase-Based Safety

1 of 3

Awards & Highlights

No Placebo Group
All patients enrolled in this trial will receive the new treatment.

Trial Design

2 Treatment Groups

Evening Exercise (PM)
1 of 2
Morning Exercise (AM)
1 of 2

Experimental Treatment

128 Total Participants · 2 Treatment Groups

Primary Treatment: Morning Exercise · No Placebo Group · N/A

Evening Exercise (PM)
Experimental Group · 1 Intervention: Evening Exercise · Intervention Types: Behavioral
Morning Exercise (AM)
Experimental Group · 1 Intervention: Morning Exercise · Intervention Types: Behavioral
First Studied
Drug Approval Stage
How many patients have taken this drug
Evening Exercise
Morning Exercise

Trial Logistics

Trial Timeline

Screening: ~3 weeks
Treatment: Varies
Reporting: baseline (0) - 13 months

Who is running the clinical trial?

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)NIH
2,213 Previous Clinical Trials
4,193,581 Total Patients Enrolled
420 Trials studying Obesity
495,566 Patients Enrolled for Obesity
University of Colorado, DenverLead Sponsor
1,644 Previous Clinical Trials
1,660,913 Total Patients Enrolled
98 Trials studying Obesity
120,570 Patients Enrolled for Obesity
Vicki CatenacciPrincipal InvestigatorUniversity of Colorado, Denver

Eligibility Criteria

Age 18 - 55 · All Participants · 5 Total Inclusion Criteria

Mark “Yes” if the following statements are true for you:
You have a body mass index (BMI) between 25 and 40 kg/m2.
You haven't been physically active for at least 3 months, meaning you haven't been exercising moderately for at least 2.5 hours per week.
You are able to be physically active and exercise without any health-related restrictions.
You are able to wear a device that tracks your activity and sleep for 7-14 days, and are willing to do so.
Anyone can participate regardless of their gender.

Frequently Asked Questions

May I have permission to join this clinical experiment?

"To participate in this trial, individuals must between 18 and 55 years old with a body mass index that is classified as overweight. This medical research seeks to recruit 128 participants." - Anonymous Online Contributor

Unverified Answer

Is enrollment open for this research endeavor?

"According to, this medical experiment was originally posted on December 7th 2021 and is still actively recruiting participants. The trial has recently been amended as of April 12th 2022." - Anonymous Online Contributor

Unverified Answer

How many participants have been permitted to enroll in this research experiment?

"Affirmative. According to the information published on, this medical trial is actively enrolling patients; it was first posted in December 2021 and most recently updated in April 2022 for a total of 128 participants at 1 site." - Anonymous Online Contributor

Unverified Answer

Is this research endeavor actively inviting people aged 55 and over to take part?

"This medical trial requires that patients are between 18 and 55. Alternatively, there are 54 trials available for minors, as well as 206 clinical studies targeting seniors 65 years or older." - Anonymous Online Contributor

Unverified Answer
Please Note: These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.