Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/24838
Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: Changes in aerobic capacity and glycaemic control in response to reduced-exertion high-intensity interval training (REHIT) are not different between sedentary men and women
Authors: Metcalfe, Richard S
Tardif, Nicolas
Thompson, Dylan
Vollaard, Niels
Contact Email: n.vollaard@stir.ac.uk
Keywords: HIT
V̇O2max
insulin sensitivity
sex differences
Issue Date: Nov-2016
Citation: Metcalfe RS, Tardif N, Thompson D & Vollaard N (2016) Changes in aerobic capacity and glycaemic control in response to reduced-exertion high-intensity interval training (REHIT) are not different between sedentary men and women, Applied Physiology, Nutrition, and Metabolism, 41 (11), pp. 1117-1123.
Abstract: Previously it has been reported that reduced-exertion high-intensity interval training (REHIT; total training time of 3 × 10 min per week) improves maximal aerobic capacity in both sedentary men and women, but improves insulin sensitivity in men only. The aim of the present study was to determine whether there is a true sex difference in response to REHIT, or that these findings can be explained by the large interindividual variability in response inherent to all exercise training. Thirty-five sedentary participants (18 women; mean ± SD age for men and women, respectively: age, 33 ± 9 and 36 ± 9 years; body mass index, 25.1 ± 2.1 and 24.1 ± 3.5 kg·m−2; maximal aerobic capacity, 38.6 ± 8.3 and 31.6 ± 4.6 mL·kg−1·min−1) completed a 6-week REHIT programme consisting of eighteen 10-min unloaded cycling sessions with 1 (first session) or 2 (all other sessions) “all-out” 10–20-s sprints against a resistance of 5% of body mass. Maximal aerobic capacity and oral glucose tolerance test-derived insulin sensitivity were determined before and after training. REHIT was associated with an increase in maximal aerobic capacity (2.54 ± 0.65 vs. 2.78 ± 0.68 L·min−1, main effect of time:p< 0.01), a trend toward reduced plasma insulin area-under-the-curve (AUC; 6.7 ± 4.8 vs. 6.1 ± 4.0 IU·min−1·mL−1,p= 0.096), but no significant change in plasma glucose AUC or the Cederholm index of insulin sensitivity. Substantial interindividual variability in response to REHIT was observed for all variables, but there was no significant effect of sex. In conclusion, REHIT improves the key health marker of aerobic capacity within a minimal total training time-commitment. There is large interindividual variability in responses to REHIT, but sex differences in the responses are not apparent.
DOI Link: http://dx.doi.org/10.1139/apnm-2016-0253
Rights: Publisher policy allows this work to be made available in this repository. Published in Applied Physiology, Nutrition, and Metabolism, 2016, 41 (11), pp. 1117-1123 by [publisher]. The original publication is available at: https://doi.org/10.1139/apnm-2016-0253

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