Participation rates for sports and exercise activities on one day by males and females, American Time Use Survey 2003–2010.

CI = 95% confidence interval. p<.05 for difference between males and females except where indicated. NA = not applicable because (standard error/%) exceeds 0.30.
The exercise “caving, spelunking and climbing” is all NA (not shown).
aNo significant difference between males and females.
bEstimates of % females do not correspond perfectly with male and female participation rates because there are more females than males in the population, especially in older age groups.