The effect of a six-month high intensity interval training program on health outcomes in breast, prostate and colorectal cancer survivors.

Controlled intervention will compare microbiome changes over six-months between cancer types. All participants will complete a four-week training program, supervised by an Accredited Exercise Physiologist or equivalent. This initial program will require attendance three times per week and entail a high-intensity interval training protocol of 4x4 minute intervals at 85-95% HRpeak, with three minute active recovery bouts between each interval. Attendance will be recorded in a supervised-training logbook. Similarly, adherence to 85-95% HRpeak during intervals will be recorded. This protocol requires a total of 38 minutes exercise and all exercise will be conducted on a cycle ergometer. The purpose of this period is to ensure all participants understand the exercise protocol and are able to complete it safely during the remainder of the study. Participants will then be provided with access to a facility with all required equipment available and encouraged to complete three sessions per week for the next six months. Participants will also be advised to maintain 150 minutes of moderate intensity or 75 minutes of vigorous intensity or a combination, therefore meeting the Australian exercise oncology guidelines. Participants will keep a log of the date and duration of exercise completed. Participants will be recruited from the Brisbane area, with the intervention being run from the University of Queensland and partnered gyms in the wider Brisbane area.