
P.O. Box 621018
San Diego, CA 92162
ph: (619) 980-9552
KWright
KIDS NEED STRETCH-N-GROW
Jan 8, 2008
A study in this month's Archives of Pediatrics and Adolescent Medicine suggests that adolescents who engage in physical activity at least twice weekly are less likely than their non-active peers to become overweight in early adulthood, Reuters reports. To assess the relationship between activity level and weight gain, Johns Hopkins University researchers evaluated the self-reported activity habits of over 3,000 adolescents in grades eight through 12 during school and after-school hours. Researchers also measured participants' body mass indices in 1996 at the start of the study and five years later. Across the study period, the prevalence of overweight participants rose from 28 percent to 51 percent. Roughly 36 percent of participants who were considered normal weight as adolescents became overweight in young adulthood. Only 11 percent of students considered overweight at the start of the study reached a healthy weight by the time it was over. Among all participants, the likelihood of becoming an overweight adult fell by 48 percent with participation in "wheel-related" activities such as cycling and roller skating more than four times weekly. Participation in school-based sports programs such as baseball and swimming three to four times per week was associated with a 20 percent decrease in the risk of overweight in early adulthood. This risk further decreased by 5 percent for every day an adolescent participated in school P.E. classes, and daily participation was associated with a 28 percent reduction in the likelihood of becoming overweight in young adulthood. However, noting that the protective effect of regular physical activity was strongest in adolescents who began the study at a normal weight, the researchers suggest that physical activity may be a better strategy for weight maintenance than for weight loss and emphasize the importance of preventing obesity from the outset (Rauscher, Reuters/Yahoo! News, 1/7/08; Menschik et al., Archives of Pediatrics and Adolescent Medicine, January 2008 [subscription required]).
P.O. Box 621018
San Diego, CA 92162
ph: (619) 980-9552
KWright