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A comparison of the health benefits of reduced-exertion high-intensity interval training (REHIT) and moderate-intensity walking in type 2 diabetes patients

Author:
José S. Ruffino, Preeyaphorn Songsorn, Malindi Haggett, Daniel Edmonds, Anthony M. Robinson, Dylan Thompson, Niels B.J. Vollaard
Source:
Applied Physiology, Nutrition, and Metabolism 2016 v.42 no.2 pp. 202-208
ISSN:
1715-5320
Subject:
blood lipids, body composition, body mass index, cross-over studies, dual-energy X-ray absorptiometry, glucose, glucose tolerance tests, glycemic control, heart rate, insulin resistance, lipid composition, men, monitoring, noninsulin-dependent diabetes mellitus, nutrition, patients, walking
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.
Agid:
5621188