Seven-year change in graded exercise treadmill test performance in young adults in the CARDIA study. Cardiovascular Risk Factors in Young Adults

Most studies of physical fitness change have been relatively small, not population-based, and lacking in women and nonwhites. The purpose of this analysis was to evaluate the 7-yr change in physical fitness in a biracial (black and white) population of young men and women. We evaluated change in exe...

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Bibliographic Details
Published in:Medicine and science in sports and exercise 1998-03, Vol.30 (3), p.427-433
Main Authors: Sidney, S, Sternfeld, B, Haskell, W L, Quesenberry, Jr, C P, Crow, R S, Thomas, R J
Format: Article
Language:English
Subjects:
Adult
African Continental Ancestry Group
Analysis of Variance
Body Mass Index
Cardiovascular Diseases
European Continental Ancestry Group
Exercise
Exercise Test - methods
Female
Follow-Up Studies
Hemodynamics
Humans
Linear Models
Male
Physical Fitness
Risk Factors
Sex Factors
Space life sciences
Weight Gain
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Summary:Most studies of physical fitness change have been relatively small, not population-based, and lacking in women and nonwhites. The purpose of this analysis was to evaluate the 7-yr change in physical fitness in a biracial (black and white) population of young men and women. We evaluated change in exercise treadmill test performance in a biracial (black and white) population of 1,962 young adults, ages 18-30 yr at baseline, who completed symptom-limited graded exercise treadmill tests at the baseline (1985-1986) and year 7 (1992-1993) examinations of the CARDIA study. Mean test duration decreased 58 s (9.5%) over 7 yr (black men, 13.6% decrease, white men, 7.4%; black women, 11.1%; white women, 7.0%). Mean time to heart rate 130 (WL130), a measure of submaximal performance, decreased 31 s (11.3%) (black men, 16.9%; white men, 10.0%; black women, 12.3%; white women, 6.1%). Baseline body mass index (BMI) and physical activity were not statistically significant predictors of test duration change in any race-gender group, but change in BMI and activity were. Seven-year weight gain >20 lbs (31% of cohort) was associated with a large decrease in fitness (18.5% decrease in mean duration, 21.8% decrease in WL130). These data suggest that fitness declines during young adulthood in blacks and whites and that fitness changes are related to changes in weight and physical activity.
ISSN:0195-9131