Using large-scale and nationally representative surveys of the America
n public conducted by the National Center for Health Statistics, the a
uthors examined recent differences in the sport and fitness activities
of men and women aged 18 or older. It was found that participation in
sport and fitness activity declined by 12% between 1985 and 1990. Con
trary to expectations, such declines were greater among women than men
, thus increasing the gender gap in sport and fitness. Young women sho
wed greater rates of decline than did older women, and the largest dec
lines, amounting to more than 30 occasions of sport and fitness partic
ipation per year, were found among the youngest group of women in the
sample. Such differences continued to be pronounced even when the infl
uence of a variety of variables pertaining to biological, social, econ
omic, and lifestyle statuses were controlled. A model for the analysis
of such variables in relation to sport and fitness activity is presen
ted.