The majority of sports and exercise bouts occurred alone (53%),
followed by bouts with family members (22%), friends/ acquaintances
(18%), multiple categories (5%), and coworkers (2%). Table 2 shows
the predictive margins for sports/exercise bouts reported in each
social environment by demographic and temporal factors. The
proportion of sports and exercise bouts occurring alone increased
incrementally with age of the participant, with a 21% difference
between 21 and 29-year-olds and individuals who are 60+ years. The
likelihood of participating in sports and exercise with friends and
acquaintances was highest for participants aged less than 30 years
and double the level of all other age groups (see Fig. 1).