Enduring Exercise Habits: Trending Norms

Study Overview
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Brief Summary
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Learning that most people engage in an activity can be a powerful motivator to adoption. But are there instances in which people can similarly find motivation from learning that only a minority of others engage in a behavior? Evidence suggests this may be possible when the message is that the size of the minority has been growing in recent years. In this study, we first examine how gym members' exercise patterns shift when they are informed that the minority versus the majority of (a subpopulation of) other Americans exercise frequently. We also test how gym members are affected by learning that the number of frequent exercisers has increased in recent years.

Detailed Description
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Gym members register online to participate in a 28-day workout program. Upon registration, participants are assigned to one of five conditions (a 2 x 2 study design plus a control group). Participants are assigned to receive information about majority exercise norms or minority exercise norms, and are informed that these norms are trending up or receive no information about trends in these norms. Participants are then prompted to create a workout schedule. Over the 28-day intervention period, participants are sent text messages with information about exercise depending on their condition (i.e., majority trending exercise norms, majority exercise norms with no information about trends, minority trending exercise norms or minority norms with no information about trends), workout reminders before their scheduled workouts, and weekly emails with additional exercise information related to their assigned condition and their schedule. Participants assigned to the control condition are prompted to create a workout schedule and receive text message reminders, information about exercise that is unrelated to social norms, and weekly emails with exercise information unrelated to social norms or trends and their workout schedule. All participants earn points for participating and for each day that they go to the gym which can be redeemed for an Amazon cash gift card after the end of the intervention period.

Official Title
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Enduring Exercise Habits: Trending Norms

Conditions
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Healthy

Intervention / Treatment
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* Behavioral: Majority Norm
* Behavioral: Trending Minority Norm
* Behavioral: Minority Norm
* Behavioral: Control
* Behavioral: Trending Majority Norm


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Has 24 Hour Fitness gym membership Exclusion Criteria: -

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Supportive Care
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Trending majority norm<br>Participants receive information about exercise-related norms that apply to the majority of the population and are told this norm has been increasing recently. | Behavioral: Trending Majority Norm<br>* Participants receive information about exercise norms that apply to the majority of the population and have recently been trending up.<br>|
| Experimental: Non-trending majority norm<br>Participants receive information about exercise-related norms that apply to the majority of the population but are not told about recent trends. | Behavioral: Majority Norm<br>* Participants receive information about exercise norms that apply to the majority of the population but are given no information about trends in this norm.<br>|
| Experimental: Trending minority norm<br>Participants receive information about exercise-related norms that apply to a minority of the population and are told this norm has been increasing recently | Behavioral: Trending Minority Norm<br>* Participants receive information about exercise norms that apply to the minority of the population and have recently been trending up.<br>|
| Experimental: Non-trending minority norm<br>Participants receive information about exercise-related norms that apply to a minority of the population but are not told about recent trends. | Behavioral: Minority Norm<br>* Participants receive information about exercise norms that apply to the minority of the population but are given no information about trends in this norm.<br>|
| Experimental: Control<br>Participants receive information about exercise unrelated to social norms or recent trends. | Behavioral: Control<br>* Participants receive information about exercise that is unrelated to social norms or trends in social norms.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Gym visits per week | Number of times the participant goes to the gym | During the 28-day intervention period | 
| Gym visits per week | Number of times the participant goes to the gym | During the 4-weeks post-intervention | 
| Gym visits per week | Number of times the participant goes to the gym | During the 10-weeks post-intervention | 
| Whether or not a participant visits the gym in a given week | Binary variable capturing whether or not a participant had any gym visits in a given week | During the 28-day intervention period | 
| Whether or not a participant visits the gym in a given week | Binary variable capturing whether or not a participant had any gym visits in a given week | During the 4-weeks post-intervention | 
| Whether or not a participant visits the gym in a given week | Binary variable capturing whether or not a participant had any gym visits in a given week | During the 10-weeks post-intervention | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Gym visits per week | Number of times the participant goes to the gym | During the 52-weeks post-intervention | 
| Whether or not a participant visits the gym in a given week | Binary variable capturing whether or not a participant had any gym visits in a given week | During the 52-weeks post-intervention | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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exercise, social norms, interest in exercising more