Title

Effect of exercise-heat acclimation on cardiac autonomic modulation in type 2 diabetes: A pilot study

Publication Name

Applied Physiology, Nutrition and Metabolism

Abstract

The effects of exercise-heat acclimation on heart rate variability (HRV) in individuals with type 2 diabetes (T2D) remains unclear. We assessed electrocardiogram recordings during exercise-heat stress in middle-aged-to-older individuals (50–70 years) with (n = 6) and without (control; n = 8;) T2D, before and after 7 days of exercise-heat acclimation. Exercising heart rate was reduced (control, 9 6 5 bpm; T2D, 14 6 9 bpm) yet HRV was not significantly different. Given the negative correlations between diminished HRV and cardiac risk observed in the scientific literature, further research is warranted. Novelty: Our observations indicate that 7 days exercise-heat acclimation may not effectively attenuate the deviation toward reduced overall HRV and unfavourable cardiac autonomic modulation in individuals with T2D.

Open Access Status

This publication is not available as open access

Volume

46

Issue

3

First Page

284

Last Page

287

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Link to publisher version (DOI)

http://dx.doi.org/10.1139/apnm-2020-0785