A study by the Centers for Disease Control and Prevention in the United States found that girls in kindergarten through fifth grade engaging in 70 to 300 minutes of physical education classes weekly scored higher on school work than those who did fewer than 35 minutes of exercise. These results have prompted concern that cutting physical education programs in schools to save money may be shortchanging students (Ann Pleshette Murphy, "Today's Topic: Health & Kids," USA Weekend, Nov. 21-23, 2008).

God designed our bodies with motion in mind. So it makes sense that people benefit from regular activity (1 Timothy 4:8). Evidence now indicates that being physically active keeps us mentally fit too.