Overview of study
BLIND
This study was a randomized controlled single blind pilot study in which participant were recruited from August, 2018 to January, 2019 (assessments were completed by April, 2019). Participants (n = 47) were randomized 1:1 to either a home-based High Intensity Interval Training program (HIIT) or a wait-list control arm each lasting 12 weeks. Participants also completed a moderate intensity session one time per week in order to compare affective responses to the HIIT sessions. The primary dependent variable was PA minutes per week at six and 12 weeks based on a modified version of the 7-Day Physical Activity Recall. Secondary dependent variables included social support, self-efficacy, enjoyment, outcome expectancies, and affective responses to PA. Participants completed an online written informed consent form prior to participating. This study was approved by the University of Minnesota’s Institutional Review Board, which reports to the Office of the Vice President for Research. The wait-list condition was given the opportunity to complete the HIIT intervention following their 12-week assessment.