"It's important to give your child lots of opportunities to get physical — preschoolers learn how their bodies work (and burn off energy) by running, jumping, climbing, and exploring their world. You probably don't need to take extra steps to make sure your preschooler gets plenty of exercise. Kids this age are so active that they get the exercise they need just from going about their daily routine (spinning, dancing, chasing, and wrestling)."
It also depends on how active they are at there childcare; preschool.
Read more at Babycenter