Exercise metabolism in non-obese patients with type 2 diabetes following the acute restoration of normoglycaemia

Gaffney, Christopher J.; Mansell, Peter; Stephens, Francis B.; Macdonald, Ian A.; Tsintzas, Kostas

Abstract

This study investigated how acute restoration of normoglycaemia affected energy metabolism during exercise in nonobese patients with type 2 diabetes. Six subjects (mean ± SEM) aged 56.2 ± 2.7 years, with a BMI of 24.5 ± 1.5 kg/m2 and a VO2 peak of 28.7 ml/kg/min, attended the lab on two randomised occasions for a four-hour resting infusion of insulin or saline, followed by 30 minutes cycling at 50% VO2 peak. During the 4 h resting infusion, there was a greater (P < 0 0001) reduction in blood glucose in insulin treatment (INS) (from 11.2 ± 0.6 to 5.6 ± 0.1 mmol/l) than in saline treatment/control (CON) (from 11.5 ± 0.7 to 8.5 ± 0.6 mmol/l). This was associated with a lower (P < 0 05) resting metabolic rate in INS (3.87 ± 0.17) than in CON (4.39 ± 0.30 kJ/min). During subsequent exercise, blood glucose increased significantly in INS from 5.6 ± 0.1 at 0 min to 6.3 ± 0.3 mmol/l at 30 min (P < 0 01), which was accompanied by a lower blood lactate response (P < 0 05). Oxygen uptake, rates of substrate utilization, heart rate, and ratings of perceived exertion were not different between trials. Insulin-induced normoglycaemia increased blood glucose during subsequent exercise without altering overall substrate utilization.

Citation

Gaffney, C. J., Mansell, P., Stephens, F. B., Macdonald, I. A., & Tsintzas, K. (2017). Exercise metabolism in non-obese patients with type 2 diabetes following the acute restoration of normoglycaemia. Journal of Diabetes Research, 2017, Article 8248725. https://doi.org/10.1155/2017/8248725

• Journal Article Type: Article
• Acceptance Date: Feb 14, 2017
• Publication Date: May 29, 2017
• Deposit Date: Mar 27, 2017
• Publicly Available Date: May 29, 2017
• Journal: Journal of Diabetes Research
• Print ISSN: 2314-6745
• Electronic ISSN: 2314-6753
• Publisher: Hindawi
• Peer Reviewed: Peer Reviewed
• Volume: 2017
• Article Number: 8248725
• DOI: https://doi.org/10.1155/2017/8248725
• Keywords: Non-obese, Type 2 diabetes, Exercise, Cycling
• Public URL: https://nottingham-repository.worktribe.com/output/862596
• Publisher URL: https://www.hindawi.com/journals/jdr/2017/8248725/
• Contract Date: Mar 27, 2017