Exercise balls have been around for a while. Whether you have seen them in commercials or at your fitness center, you have probably realized that they are good for something. Actually, they are very effective in helping you build a more flexible body (back & beyond). These balls help you strengthen and tone your muscles to become as healthy as you possibly can. They are affordable too. So you won’t have to drive all the way to your fitness center to use these.

If you are looking to strengthen your back and tone your muscles, here are 4 exercise ball kits you should try:

TKO Anti Burst Fitness Ball Set 65cm: perfect for yoga. The fact that it’s durable and doesn’t burst too easily makes this a great investment.

Max Fitness 75cm Exercise Ball with Foot Pump: the 65 cm balls are great for smaller body types, but if you are tall, you are going to need one of these. And the foot pump makes it much easier to use.

GoFit 75cm Professional Stability Ball: not only a decent ball for those who are taller than most of us, but it comes with a highly valuable DVD that teaches you how to get the best out of your ball.

Gaiam Balance Ball Chair: a unique chair that helps you correct the way your sit and avoid hurting your back while you are doing it. It’s comfortable and fun.

Did I miss any?