A new study finds, on average, children enrolled in soccer, baseball or softball exercised heavily for only 45 minutes during practice. That's 15 minutes less than the amount recommended by national guidelines.
Among girls who played softball, only 2 percent got at least 60 minutes of strong exercise during practice.
Boys 10 or younger and those enrolled in soccer tended to get more heavy exercise.
National recommendations suggests at least 60 minutes of moderate to heavy exercise for children.
The study appears in the Archives of Pediatrics and Adolescent Medicine.