High-intensity interval training as an efficacious alternative to moderate-intensity continuous training for adults with prediabetes.
OBJECTIVE
High-intensity interval training (HIIT) leads to improvements in various markers of cardiometabolic health but adherence to HIIT following a supervised laboratory intervention has yet to be tested. We compared self-report and objective measures of physical activity after one month of independent exercise in individuals with prediabetes who were randomized to HIIT (n = 15) or traditional moderate-intensity continuous training (MICT, n = 17).


METHODS
After completing 10 sessions of supervised training participants were asked to perform HIIT or MICT three times per week for four weeks.


RESULTS
Individuals in HIIT (89 ± 11%) adhered to their prescribed protocol to a greater extent than individuals in MICT (71 ± 31%) as determined by training logs completed over one-month follow-up (P = 0.05, Cohen's d = 0.75). Minutes spent in vigorous physical activity per week measured by accelerometer were higher in HIIT (24 ± 18) as compared to MICT (11 ± 10) at one-month follow-up (P = 0.049, Cohen's d = 0.92). Cardiorespiratory fitness and systolic blood pressure assessed at one-month follow-up were equally improved (P's < 0.05).


CONCLUSIONS
This study provides preliminary evidence that individuals with prediabetes can adhere to HIIT over the short-term and do so at a level that is greater than MICT.
School of Health and Exercise Sciences, University of British Columbia, Okanagan Campus, 3333 University Way, Kelowna, BC, Canada V1V 1V7.
Mary E
ME
Jung
School of Health and Exercise Sciences, University of British Columbia, Okanagan Campus, 3333 University Way, Kelowna, BC, Canada V1V 1V7.
Jessica E
JE
Bourne
School of Kinesiology, University of British Columbia, 210-6081 University Boulevard, Vancouver, BC, Canada V6T 1Z1.
Mark R
MR
Beauchamp
School of Health and Exercise Sciences, University of British Columbia, Okanagan Campus, 3333 University Way, Kelowna, BC, Canada V1V 1V7.
Emily
E
Robinson
School of Health and Exercise Sciences, University of British Columbia, Okanagan Campus, 3333 University Way, Kelowna, BC, Canada V1V 1V7.
Jonathan P
JP
Little
D000054:Acceleration; D000328:Adult; D000886:Anthropometry; D002318:Cardiovascular Diseases / Q000517:prevention & control; D003924:Diabetes Mellitus, Type 2 / Q000517:prevention & control; D015444:Exercise; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D010349:Patient Compliance; D010809:Physical Fitness; D011236:Prediabetic State / Q000628:therapy*; D011795:Surveys and Questionnaires; D013599:Systole