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- Title
The Decline in Blood Glucose Levels Is Less With Intermittent High-Intensity Compared With Moderate Exercise in Individuals With Type 1 Diabetes.
- Authors
Guelfi, Kym J.; Jones, Timothy W.; Fournier, Paul A.
- Abstract
OBJECTIVE -- To compare the response of blood glucose levels to intermittent high-intensity exercise (IHE) and moderate-intensity exercise (MOD) in individuals with type 1 diabetes. RESEARCH DESIGN AND METHODS -- Seven healthy individuals with type 1 diabetes were tested on two separate occasions, during which either a 30-min MOD or IHE protocol was performed. MOD consisted of continuous exercise at 40% VO2peak, while the IHE protocol involved a combination of continuous exercise at 40% VO2peak interspersed with 4-s sprints performed every 2 min to simulate the activity patterns of team sports. RESULTS -- Both exercise protocols resulted in a decline in blood glucose levels. However, the decline was greater with MOD (-4.4 ± 1.2 mmol/l) compared with IHE (-2.9 ± 0.8 mmol/l; P < 0.05), despite the performance of a greater amount of total work with IHE (P < 0.05). During 60 min of recovery from exercise, glucose levels remained higher in IHE compared with MOD (P < 0.05). Furthermore, glucose levels remained stable during recovery from IHE, while they continued to decrease after MOD (P < 0.05). The stabilization of blood glucose levels with IHE was associated with elevated levels of lactate, catecholamines, and growth hormone during early recovery from exercise (P < 0.05). There were no differences in free insulin, glucagon, cortisol, or free fatty acids between MOD and IHE. CONCLUSIONS -- The decline in blood glucose levels is less with IHE compared with MOD during both exercise and recovery in individuals with type 1 diabetes.
- Subjects
BLOOD sugar; EXERCISE; DIABETES; GLUCOSE; LACTATES; CATECHOLAMINES; SOMATOTROPIN
- Publication
Diabetes Care, 2005, Vol 28, Issue 6, p1289
- ISSN
0149-5992
- Publication type
Article
- DOI
10.2337/diacare.28.6.1289