Document Detail

A 10-s sprint performed prior to moderate-intensity exercise prevents early post-exercise fall in glycaemia in individuals with type 1 diabetes.
MedLine Citation:
PMID:  17583795     Owner:  NLM     Status:  MEDLINE    
AIMS/HYPOTHESIS: We investigated whether a 10-s maximal sprint effort performed immediately prior to moderate-intensity exercise provides another means to counter the rapid fall in glycaemia associated with moderate-intensity exercise in individuals with type 1 diabetes. MATERIALS AND METHODS: Seven complication-free type 1 diabetic males (21.6 +/- 3.6 years; mean+/-SD) with HbA(1c) levels of 7.4 +/- 0.7% injected their normal morning insulin dose and ate their usual breakfast. When post-meal glycaemia fell to approximately 11 mmol/l, participants were asked to perform a 10-s all-out sprint (sprint trial) or to rest (control trial) immediately before cycling at 40% of peak rate of oxygen consumption for 20 min, with both trials conducted in a random counterbalanced order. RESULTS: Sprinting did not affect the rapid fall in glycaemia during the subsequent bout of moderate-intensity exercise (2.9 +/- 0.4 mmol/l in 20 min; p = 0.00; mean+/-SE). However, during the following 45 min of recovery, glycaemia in the control trial decreased by 1.23 +/- 0.60 mmol/l (p = 0.04) while remaining stable in the sprint trial, subsequently decreasing in this latter trial at a rate similar to that in the control trial. The large increase in noradrenaline (norepinephrine) (p = 0.005) and lactate levels (p = 0.0005) may have contributed to the early post-exercise stabilisation of glycaemia in the sprint trial. During recovery, adrenaline (epinephrine) and NEFA levels increased marginally in the sprint trial, but other counter-regulatory hormones did not change significantly (p < 0.05). CONCLUSIONS/INTERPRETATION: A 10-s sprint performed immediately prior to moderate-intensity exercise prevents glycaemia from falling during early recovery from moderate-intensity exercise in individuals with type 1 diabetes.
V A Bussau; L D Ferreira; T W Jones; P A Fournier
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-06-22
Journal Detail:
Title:  Diabetologia     Volume:  50     ISSN:  0012-186X     ISO Abbreviation:  Diabetologia     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-08-07     Completed Date:  2008-01-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0006777     Medline TA:  Diabetologia     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  1815-8     Citation Subset:  IM    
School of Human Movement and Exercise Science, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA, 6009, Australia.
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MeSH Terms
Blood Glucose / metabolism*
Diabetes Mellitus, Type 1 / blood,  physiopathology*
Exercise / physiology*
Fatty Acids, Nonesterified / blood
Hormones / blood
Hypoglycemia / prevention & control*
Insulin / therapeutic use
Lactates / blood
Reg. No./Substance:
0/Blood Glucose; 0/Fatty Acids, Nonesterified; 0/Hormones; 0/Lactates; 11061-68-0/Insulin

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