van Dijk, JW, Eijsvogels, TM, Nyakayiru, J, Schreuder, THA, Hopman, MT, Thijssen, DHJ and van Loon, LJC (2016) Glycemic control during consecutive days with prolonged walking exercise in individuals with type 1 diabetes mellitus. Diabetes Research and Clinical Practice, 117. pp. 74-81. ISSN 0168-8227

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Abstract

Aims: Despite its general benefits for health, exercise complicates the maintenance of stable blood glucose concentrations in individuals with type 1 diabetes. The aim of the current study was to examine changes in food intake, insulin administration, and 24-h glycemic control in response to consecutive days with prolonged walking exercise (~8 h daily) in individuals with type 1 diabetes. Methods: Ten individuals with type 1 diabetes participating in the worlds' largest walking event were recruited for this observational study. Simultaneous measurements of 24-h glycemic control (continuous glucose monitoring), insulin administration and food intake were performed during a non-walking day (control) and during three subsequent days with prolonged walking exercise (daily distance 40 or 50 km). Results: Despite an increase in daily energy (31 ± 18%; p < 0.01) and carbohydrate (82 ± 71 g; p < 0.01) intake during walking days, subjects lowered their insulin administration by 26 ± 16% relative to the control day (p < 0.01). Average 24-h blood glucose concentrations, the prevalence of hyperglycemia (blood glucose >10 mmol/L) and hypoglycemia (blood glucose <3.9 mmol/L) did not differ between the control day and walking days (p > 0.05 for all variables). The prolonged walking exercise was associated with a modest increase in glycemic variability compared with the control day (p < 0.05). Conclusion: Prolonged walking exercise allows for profound reductions in daily insulin administration in persons with type 1 diabetes, despite large increments in energy and carbohydrate intake. When taking such adjustments into account, prolonged moderate-intensity exercise does not necessarily impair 24-h glycemic control. © 2016 Elsevier Ireland Ltd.

Item Type:	Article
Uncontrolled Keywords:	1103 Clinical Sciences
Subjects:	R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions:	Sport & Exercise Sciences
Publisher:	Elsevier
Date Deposited:	24 Jun 2016 11:34
Last Modified:	04 Sep 2021 12:49
DOI or ID number:	10.1016/j.diabres.2016.04.053
URI:	https://researchonline.ljmu.ac.uk/id/eprint/3747

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