Figure 1. Flow of participants through each stage of the trial.

^a WALK  =  walking to 65–75% of heart rate max, AIT  =  aerobic interval training to a 85–95% of heart rate max MVIT  =  Maximal volitional intensity training (‘all out’ exercise). ^b Participant unable to undertake exit VO₂max because of injury unrelated to the study. ^c Four participants did not undertake exit VO₂max: Exercise related injury n = 1, chest infection n = 2, participant exited early as dissatisfied with exercise program n = 1.