A Randomized Two-Arm Proof of Concept Study Testing A Novel Approach to Exercise Promotion Based on Affect-regulation

Satisfaction With Study Participation as Measured by the Participant Satisfaction Questionnaire

An 8-item self-report questionnaire used to assess participant satisfaction with study participation using a Likert scale ranging from 1 to 4 . Scores are summed and then averaged; total scores range from 1- 4. Higher scores indicate greater satisfaction.

Time frame: 12-weeks follow-up assessment.

Study Retention at 2-weeks Follow-up

Number of participants who complete the 2-week follow-up assessment out of the number of participants who enroll in the study.

Time frame: 2-weeks follow-up assessment.

Study Retention at 6-weeks Follow-up

Number of participants who complete the 6-week follow-up assessment out of the number of participants who enroll in the study.

Time frame: 6-weeks follow-up assessment.

Study Retention at 12-weeks Follow-up

Number of participants who complete the 12-week follow-up assessment out of the number of participants who enroll in the study.

Time frame: 12-weeks follow-up assessment.

Acceptability of the Affect-regulated Exercise Prescription Measured Using the Treatment Acceptability and Preferences (TAP) Measure

A 4-item self-report questionnaire used to measure acceptability of the affect-regulated exercise prescription using a Likert scale ranging from 0 (not at all) to 4 (very much). Total scores range from 0 - 16. Higher scores indicate greater acceptability.

Time frame: 12-weeks follow-up assessment.

Change in Voluntary Exercise Behavior Measured Using The Voluntary Exercise Questionnaire

A 6-item self-report measure of exercise performed over the last month and week. Two items range from 1 (never) to 7 (often) and four items range from 0 (0 days per week) to 7 (7 days per week). Total scores range from 2-21. Higher scores reflect higher levels of voluntary exercise behavior.

Time frame: Baseline, 6-weeks follow-up, and 12-weeks follow-up.

Change in Physical Activity Category Completed in the Past Month Measured Using the Stanford Leisure-Time Activity Categorical Item (L-Cat)

A single item self-report measure that present six statements describing various levels of monthly physical activity. Response options range from 1 (I did not do much physical activity) to 6 (I did vigorous activities almost daily). Total scores range from 1-6. Higher scores reflect more vigorous, more frequent physical activities completed in the past month.

Time frame: Baseline, 6-weeks follow-up, and 12-weeks follow-up.

Change in Physical Activity using The International Physical Activity Questionnaire (IPAQ)-Short Form

A 7-item self-report measure calculating the amount of health-related vigorous and moderate-intensity physical activity as well as sitting time performed by adult participants over a one-week period. The number of minutes per day participants report for 3 categories vigorous, moderate, and walking activities are multiplied by the average metabolic equivalent (METs) for each category (8.0 METs, 4.9 METs, and 3.3 METs, respectively). Scores for each category are summed to calculate a physical activity score for the past week quantified as total MET values. Higher METS demonstrate a higher total volume of physical activity completed in the prior week. MET values between 0-599 are considered "low active," MET values between 600-1499 are considered "moderately active," and MET values 1500 or higher are considered "High active." This measure also assesses participants' total sitting time in the past week. Total number of minutes reported for sitting time is not part of the physical activity

Time frame: Baseline, 6-weeks follow-up, and 12-weeks follow-up.