Only train your abdominal muscles, two or three times a week. While these muscles do recover somewhat faster than your other muscles, they still need time to rest. Make an attempt to keep a strict schedule, such as working on them every other weekday and relaxing them on the weekends.

If you're trying to encourage your kids to exercise, make sure you don't push them to do too much too fast. Try to build up the amount of exercise they're getting. If they're used to be couch potatoes, try starting with something easy like biking or swimming, instead of having them run two miles. If they feel it's too hard from the get-go, they'll dig their feet in and try and fight you.