Statistical analysis
REGRESSIONS
All data was analysed using R studio version 4.0.2 and conducted on an intention-to-treat basis, which included all randomly assigned participants. Linear mixed models were used to determine the effect of exercise intensity (group) over time and to determine the interaction between timepoint and group (between-group differences). To examine the within group changes, we calculated the estimated marginal means from the linear mixed models. The unique participant codes were used as a random effect to account for repeated measures. All models were adjusted for age. Simple linear regressions were used to determine the association between VO