No Placebo Group
Every participant receives an active treatment — no one gets a placebo.
Healthy Volunteers Welcome
You do not need to have the condition being studied to take part.
Ready to participate?
Review the details below, then apply to join this clinical trial.
At a Glance
Age
18 and older
Sex
Any
Study type
Interventional
Purpose
Prevention
Participants needed
280 (estimated)
Sponsor
University of Southern California · Other
Who this trial is looking for
This trial is looking for adults who are overweight or obese and do not exercise much. Participants will be asked to engage in a physical activity program and wear a smartwatch provided by the study to track their activity.
Are You a Good Fit for This Trial?
You may be able to join if
I am at least 18 years old.
I live in the United States.
My BMI is 25 or higher.
I currently do less than 60 minutes of physical activity each week.
I own a smartphone.
I have internet access during the study.
I can speak and read in English.
I want to start a physical activity program.
You may not be able to join if
I cannot give informed consent due to a cognitive disability.
I have a medical condition that prevents me from being active.
I am currently pregnant.
I have been referred to this study by another participant or from Reddit.
Summarized in plain language from this trial's official eligibility criteria.
The full criteria are further down this page — only the research team can
confirm whether you qualify.
Think this trial could be right for you?
Answer three quick questions written from this study's own rules to see if you may qualify. No account needed to find out.
This early-phase trial will test intervention strategies to influence affective mechanisms underlying physical activity and determine whether changes in those mechanisms result in change in physical activity behavior among inactive adults who are overweight or obese.
Trial Locations
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City
State
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Status
Eligibility Criteria
Inclusion criteria:
1. Aged ≥ 18 years
2. Reside in the United States
3. Self-reported BMI ≥ 25
4. Current structured physical activity engagement \< 60 minutes per week
5. Own a personal smartphone device
6. Reside in an area with Internet or Wi-Fi connectivity during the study period
7. Able to s…
Inclusion criteria:
1. Aged ≥ 18 years
2. Reside in the United States
3. Self-reported BMI ≥ 25
4. Current structured physical activity engagement \< 60 minutes per week
5. Own a personal smartphone device
6. Reside in an area with Internet or Wi-Fi connectivity during the study period
7. Able to speak and read in English
8. Interested and willing to start a physical activity program
9. Willing to wear a Fitbit Versa smartwatch provided by the study team everyday continuously (including at work and during physical activity), in place of any Fitbits or smartwatches previously worn, for the duration of the study period
10. Able to read the small font on a smartwatch screen without glasses, or willing to carry reading glasses during physical activity for the purpose of reading the smartwatch screen
Exclusion Criteria:
1. Inability to provide informed consent due to cognitive disability
2. Inability to engage in one or more key treatment components, including those with medical conditions that preclude physical activity engagement or who cannot wear an accelerometer on the wrist or answer brief surveys on the smartwatch for any reason
3. Current pregnancy
4. Referred to the study by another participant or from Reddit.
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