There's no one-size-fits-all situation with exercise balls. Instead, finding the right one for you depends on a few factors (more on that in a minute), but in general, you can use this chart below ...

Physio ball, exercise ball, stability ball, fitness ball — whatever you call it, we think a ball is must have for just about everyone. A stability ball can be used in the office and the gym ...

Do 1 to 3 sets of 10 to 20 repetitions. To add variety to this exercise, you can use your elbows to make small circles with the ball in both directions. Come into plank position with your elbows ...

That means they're getting at least 2 1/2 hours of moderate cardio and two days of muscle-building exercise each week. Greg Bauer is 76 years old. He's president of the Senior Center Council ...

Caveats apply, though. "When a senior goes into 24-Hour Fitness and they have them trying to stand up on an exercise ball and balance themselves, I go over and intervene," Scleparis says.