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Glycemic control during consecutive days with prolonged walking exercise in individuals with type 1 diabetes mellitus

van Dijk, JW and Eijsvogels, TM and Nyakayiru, J and Schreuder, THA and Hopman, MT and 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: 07 May 2017 00:08
DOI or Identification number: 10.1016/j.diabres.2016.04.053
URI: http://researchonline.ljmu.ac.uk/id/eprint/3747

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