The reasons for poor exercise adherence are numerous and complex, but a perceived lack of time is consistently reported as one of the main barriers in people with type 2 diabetes. In response to this, submaximal high-intensity interval training (HIIT) and supramaximal sprint interval training (SIT) have been proposed as possible time-efficient alternative exercise options for improving glycaemic control. In a study by Metcalfe, R.S., Fitzpatrick, B., Fitzpatrick, S. et al., it was proven that a brief bout of reduced exertion high intensity interval training improves markers of postprandial glycaemic control over the following 24h period when compared with no exercise. The exercise bouts consisted of 10 min of unloaded pedaling interspersed with two ‘all-out’ sprints against a resistance equivalent to 5% of body mass. Just before each sprint, participants increased their pedal cadence to their maximal speed; the braking force was applied to the ergometer and participants maintained the highest possible cadence against the resistance for 20s. Sprints were performed at 2min 40s and 6min 40s into the 10-min exercise session. The findings suggest that reduced exertion high intensity interval training may offer a genuinely time-efficient exercise option for men with type 2 diabetes.
Metcalfe, R.S., Fitzpatrick, B., Fitzpatrick, S. et al. European Journal of Applied Physiology (2018) 118: 2551.
