Activity Trends
30 minutes of moderate physical activity is recommended daily.
28% of men and 44% of women say they rarely or never exercise (http://www.barc.usda.gov/bhnrc/foodsurvey/Dhks95.html).
37% of students in grades 9-12 reported to engage in 20 minutes of vigorous physical activity 3 or more times/week (JAMA, 1995).