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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Online ISSN 1827-1928
Szmedra L. 1, Lemura L. M. 1, Shearn W. M. 2
1 Graduate Division of Exercise Science, Bloomsburg University, Bloomsburg, Pennsylvania, USA;
2 Department of Cardiology, Cardiac Exercise Laboratory, Geisinger Medical Center, Danville, Pennsylvania, PA, USA
Background. The purpose of this investigation was to examine the exercise tolerance, body composition and blood lipids in African-American women, possessing greater than or equal to 30% body fat, following six weeks of endurance training.
Methods. Oxygen consumption (V.O2), central hemodynamics, blood lipids, body weight, body fat, and the body mass index of seven subjects (21.0±0.8 yrs) were studied. Heart rate (HR), blood pressure (BP), exercise duration, rating of perceived exertion (RPE), blood lactate (bLA) and V.O2 were obtained in response to a maximal exercise tolerance test on a motorized treadmill. Subjects trained three times per week for 50 minutes per session (30 minutes at 70% maximal oxygen consumption (V.O2max).
Results. Dependent “t”-tests revealed significant (p<0.05) increases in V.O2max, 27%; exercise duration, 31%; as well as peak HR, systolic blood pressure (SBP), and bLA. Values for submaximal HR, SBP, RPE during the post-training test were lower. In addition, body weight, body fat and the body mass index decreased 2.2%, 1.3% and 3.4% respectively. There were no changes in blood lipids.
Conclusions. These findings suggest short-term training at 70% V.O2max provides the necessary stimulus for obese women to improve exercise tolerance and body composition. However, the training stimulus is insufficient to alter lipid profiles.