will easily allow most seniors to do an upper-body or strength-training workout from the comfort of their home. You can't go wrong with a fitness classic like the tried-and-true exercise ball.

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 ...

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 ...

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 ...

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.