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1 Department of Kinesiology, Indiana University, Bloomington, Indiana 46405; 2 Research Laboratory for Molecular Endocrinology, Laval University, Ste-Foy, Quebec, Canada G1K 7P4; 3 School of Kinesiology and Leisure Studies, University of Minnesota, Minneapolis, Minnesota 55455; 4 Division of Biostatistics, Washington University School of Medicine, St. Louis, Missouri 63110; 5 Department of Health and Kinesiology, Texas A&M University, College Station, Texas 77843; and 6 Pennington Biomedical Research Center, Baton Rouge, Louisiana 70808
Effects of age, sex, race, and initial
fitness on training responses of maximal O2 uptake
(
O2 max) are unclear. Data were
available on 435 whites and 198 blacks (287 men and 346 women), aged
17-65 yr, before and after standardized cycle ergometer training. Individual responses varied widely, but
O2 max increased significantly for all
groups. Responses by men and women and by blacks and whites of all ages
varied widely. There was no sex difference for change (
) in
O2 max
(ml · kg
1 · min
1); women
had lower initial values and greater relative (%) increases. Blacks
began with lower values but had similar responses. Older subjects had a
lower
but a similar percent change. Baseline
O2 max correlated nonsignificantly with

O2 max but significantly with
percent change. There were high, medium, and low responders in all age
groups, both sexes, both races, and all levels of initial fitness. Age,
sex, race, and initial fitness have little influence on
O2 max response to standardized training in a large heterogeneous sample of sedentary black and white
men and women.
trainability; maximal oxygen uptake
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