Data analysis
SECONDARY
Descriptive statistics were used to summarize baseline variables in the aggregate sample and t-tests and chi-squared tests were used to compare groups at baseline (as appropriate). Unadjusted means were reported over time by condition for each of the primary and secondary study outcomes.A series of generalized linear models were used to examine intervention effects on absolute scores at follow-up (six and 12 weeks in a single model) controlling for baseline. Models included effects of time, condition, time* condition, and baseline value of the outcome. Fixed effects were estimated in each model. Repeated measures ANOVA was used to examine within subject differences on affective responses between the HIIT and moderate intensity PA sessions. All analyses were run in SAS 9.3 based on the intent to treat sample (all randomized participants included in the analysis).