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The Effect of Exercise Training on Physical Fitness in Type 2 Diabetes Mellitus.
MedLine Citation:
PMID:  20139782     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Few studies have compared changes in cardiorespiratory fitness between aerobic training only or in combination with resistance training. Additionally, no study to date has compared strength gains between resistance training and combined exercise training in type 2 diabetes mellitus (T2DM). PURPOSE:: We evaluated the effects of aerobic exercise training (A), resistance exercise training (R), combined aerobic and resistance training (A+R) and a sedentary control group (C) on cardiorespiratory fitness and muscular strength in individuals with T2DM. METHODS:: 251 participants in the Diabetes Aerobic and Resistance Exercise (DARE) trial were randomly allocated to A, R, A+R or C. Peak oxygen consumption (V O2peak), workload and treadmill time were determined following maximal exercise testing at 0 and 6 months. Muscular strength was measured as the 8 RM on the leg press, bench press and seated row. Responses were compared between younger (39-54) and older (55-70) adults and between sexes. RESULTS:: V O2peak improved by 1.73 and 1.93 mLO2/kg/min with A and A+R respectively compared to C (p<0.05). Strength improvements were significant following A+R and R on the leg press (A+R:48%, R:65%), bench press (A+R:38%, R:57%) and seated row (A+R:33%, R:41%) (p<0.05). There was no main effect of age or sex on training performance outcomes. There was however a tendency for older participants to increase V O2peak more with A+R (+1.5 mLO2/kg/min) than with A only (+0.7 mLO2/kg/min). CONCLUSIONS:: Combined training did not provide additional benefits nor did it mitigate improvements in fitness in younger subjects compared to aerobic and resistance training alone. In older subjects, there was a trend to greater aerobic fitness gains with A+R versus A alone.
Authors:
Joanie Larose; Ronald J Sigal; Normand G Boulé; George A Wells; Denis Prud'homme; Michelle Fortier; Robert D Reid; Heather Tulloch; Douglas Coyle; Penny Phillips; Alison Jennings; Farah Khandwala; Glen P Kenny
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2010-2-4
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  -     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-2-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada, K1N 6N5 2Clinical Epidemiology Program, Ottawa Health Research Institute, Ottawa, Ontario, Canada, K1Y 4E9 3Departments of Medicine, Cardiac Sciences and Community Health Sciences, Faculties of Medicine and Kinesiology, The University of Calgary, Calgary, Alberta, Canada, T2N 2T9 4Faculty of Physical Education and Recreation, University of Alberta, Edmonton, Alberta, Canada, T6G 2H9.
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