G20i Thematic Poster Session Tracking of Physical Activity
To examine the tracking of participation in physical activity (PA) from adolescence to young adulthood and to determine the probability of partipation in a specific activity during both adolescence and young adulthood.
Subjects included 268 men and women (mean age 24.7) who participated in a longitudinal study during adolescence. Current PA data, obtained via a telephone interview, was compared to PA data collected from 1990 through 1993. The sample consisted of 132 males and 136 females, approximately 62% of the original sample.
The 10-year correlation of total PA (hrs/wk) between 1990 and 2000 was 0.21, indicating a weak association between PA in adolescence and young adulthood. In order to examine the stability of participation in specific activities, the predictive value positive (PV+) was determined for activities reported in 1990 (9th grade) and 1993 (12th grade) in relation to activities reported in 2000. For both males and females the PV+ for most activities was higher in 1993 than 1990, suggesting that participation in specific activities during senior high school, rather than junior high school, was more predictive of participation in young adulthood. The PV+ (1990 to 2000) for specific activities ranged from .10 to .67 for males and from .00 to .52 for females. The PV+ (1993 to 2000) for specific activities ranged from .08 to .75 for males and from .09 to .71 for females. The highest PV+ was found for weight lifting (.75) and running (.69) in males and for aerobics (.71) and running (.61) in females. During adolescence, 5 of the top 10 activities in males and 4 of the top 10 activities in females were team activities. In young adulthood, a gender difference was suggested as only 1 of the top 10 activities in females was a team activity compared to 4 in males.
These results suggest that (1) physical activity does not track from adolescence to young adulthood; (2) activity participation in senior high school, rather than junior high school, is more predictive of physical activity in young adulthood; and (3) activity preferences, especially in young adult females, provide potential guidelines for physical education curriculums. Supported by NIAMS (AR39541) and NICHD (HD35607).