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Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: A comparison of the health benefits of reduced-exertion high-intensity interval training (REHIT) and moderate-intensity walking in type 2 diabetes patients
Author(s): Ruffino, Jose Sofia
Songsorn, Preeyaphorn
Haggett, Malindi
Edmonds, Daniel
Robinson, Anthony M
Thompson, Dylan
Vollaard, Niels
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Keywords: HIT
sprint interval training (SIT)
glycaemic control
blood pressure
Issue Date: Feb-2017
Citation: Ruffino JS, Songsorn P, Haggett M, Edmonds D, Robinson AM, Thompson D & Vollaard N (2017) A comparison of the health benefits of reduced-exertion high-intensity interval training (REHIT) and moderate-intensity walking in type 2 diabetes patients, Applied Physiology, Nutrition, and Metabolism, 42 (2), pp. 202-208.
Abstract: Reduced-exertion high-intensity interval training (REHIT) is a genuinely time-efficient intervention that can improve aerobic capacity and insulin sensitivity in sedentary individuals. The present study compared the effects of REHIT and moderate-intensity walking on health markers in patients with type 2 diabetes (T2D) in a counter-balanced crossover study. Sixteen men with T2D (mean ± SD age: 55 ± 5 years, body mass index: 30.6 ± 2.8 kg·m −2, maximal aerobic capacity: 27 ± 4 mL·kg−1·min−1) completed 8 weeks of REHIT (three 10-min low-intensity cycling sessions/week with two “all-out” 10–20-s sprints) and 8 weeks of moderate-intensity walking (five 30-min sessions/week at an intensity corresponding to 40%–55% of heart-rate reserve), with a 2-month wash-out period between interventions. Before and after each intervention, participants underwent an incremental fitness test, an oral glucose tolerance test (OGTT), a whole-body dual-energy X-ray absorptiometry scan, and continuous glucose monitoring. REHIT was associated with a significantly larger increase in maximal aerobic capacity compared with walking (7% vs. 1%; time × intervention interaction effect:p< 0.05). Both REHIT and walking decreased resting mean arterial pressure (−4%; main effect of time:p< 0.05) and plasma fructosamine (−5%; main effect of time:p< 0.05). Neither intervention significantly improved OGTT-derived measures of insulin sensitivity, glycaemic control measured using continuous glucose monitors, blood lipid profile, or body composition. We conclude that REHIT is superior to a 5-fold larger volume of moderate-intensity walking in improving aerobic fitness, but similar to walking REHIT is not an effective intervention for improving insulin sensitivity or glycaemic control in T2D patients in the short term.
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Rights: Published by NRC Research Press in Applied Physiology, Nutrition, and Metabolism 2017, 42.2, pp. 202-208.

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