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Cardiovagal Modulation and Efficacy of Aerobic Exercise Training in Obese Individuals.
MedLine Citation:
PMID:  23899888     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: To determine the effects of a 16 wk aerobic exercise program on VO2peak in obese individuals, with and without T2D, who were classified as having either high or low cardiovagal modulation (HCVM or LCVM) at baseline.
METHODS: Obese individuals (38 women/19 men; BMI = 36.1 kg/m) were studied in the fasted state. ECG recordings were obtained while seated for 3 min, prior to and after 4 mo of exercise training (4 d/wk, 65% VO2peak). The ECG recording was analyzed for HRV in the spectral domain. Groups were split on a marker of CVM (normalized high frequency (HFnu)) at the 50th percentile, as either high (H) or low (L) CVM.
RESULTS: VO2peak only increased with exercise training among those classified as having HCVM, regardless of diabetes status (T2D: HCVM 20.3 to 22.5 mL/kg/min, LCVM 24.3 to 25.0 mL/kg/min; Obese non-diabetics: HCVM 24.5 to 26.3 mL/kg/min, LCVM 23.1 to 23.7 mL/kg/min) (p<0.05). No change in VO2peak was observed for the LCVM group. Changes in weight do not explain the change in VO2peak among the HCVM group. Glucose tolerance only improved among the LCVM group with T2D.
CONCLUSION: Obese individuals, with or without T2D, when classified as having relatively HCVM prior to exercise training, have a greater propensity to improve VO2peak following a 16-week aerobic training program.
Authors:
Tracy Baynard; Styliani Goulopoulou; Ruth F Sosnoff; Bo Fernhall; Jill A Kanaley
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-7-29
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2013 Jul 
Date Detail:
Created Date:  2013-7-31     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:
1Integrative Physiology Laboratory, Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 2Department of Physiology, Georgia Regents University, Augusta, GA 3Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 4Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO.
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