Power of Choice on Autonomy, Motivation, Exercise Adherence, and Cardiorespiratory Fitness
Elevated Blood Sugar
About this trial
This is an interventional prevention trial for Elevated Blood Sugar focused on measuring Autonomy Support, Exercise Motivation, Physical Activity Adherence, Cardiorespiratory Fitness, Prediabetes
Eligibility Criteria
Inclusion Criteria:
- BMI 22-45 kg/m2;
- HbA1c score indicative of prediabetes (5.7-6.4%);
- blood pressure of <160/99 mm Hg assessed according to Canadian Hypertension Education Program guidelines;
- without diagnosed diabetes;
- no prior history of cardiovascular disease;
- not on hormone replacement therapy;
- Cardiovascular medications (e.g., statins) will be allowed if patients are on stable therapy (6 months on same dose)
Exclusion Criteria:
- taking glucose-lowering medications;
- fasting triglycerides ≥5.5 mmol/l;
- any explicit contraindications to exercise (e.g., musculoskeletal injury)
Sites / Locations
- University of British Columbia
Arms of the Study
Arm 1
Arm 2
Arm 3
Active Comparator
Active Comparator
Experimental
MICT
HIIT
CHOICE
Continuous exercise for 30 minutes per session at 60-70% of heart rate max for five times per week, consistent with physical activity guidelines that advocate 150 minutes per week of moderate activity.
Five repeated vigorous intervals of 1-min duration at 80-90% of heart rate max interspersed with 1-min recovery periods; 3-min warm-up and 2-min cool-down, making the total session duration 15 minutes for five times/week, equated to match the guidelines of 75 min of vigorous exercise per week.
Participants will be introduced to HIIT and MICT during sessions 1 and 2 of the 4-week intervention in a counterbalanced randomized order, and will thereafter self-select one of the two exercise types for remaining sessions. Exercise will be matched to the parallel imposed conditions.