In recent years, many exercise equipment and gadgets emerged as more and more people became body-conscious and mindful of their health. One of the most popular fitness equipment is the exercise ball. No surprise there, because not only is it one of the cheapest – it is also one of the most versatile, allowing you to work out different muscles. If you're interested in purchasing one for yourself, here are some guidelines to help you choose the one that's right for you.

The 101 on exercise balls

The exercise ball is an exercise and physical therapy equipment. It is used by physical therapists' to treat lower back pain. It was recently used in regular fitness training to strengthen and develop the abs and back, and in weight or strength training to increase one's stability. It is usually made of plastic, vinyl or solid foam rubber. The balls rely on “proprioception” or the awareness of one’s foot or hand in relationship to space. The ball's instability forces the body to constantly measure its orientation in space. This helps in further increasing one's balance and stability.

How to buy an exercise ball

- If you have back-related problems, buy a ball that is approved by your doctor, spine specialist or physical therapist to prevent mishaps.

- Choose a ball that's the right size for your height. Use the following measurements as a guide:
55 cm - 4'11" – 5'4"
65 cm - 5'5" – 5'11"
75 cm - 6'0" - 6' 7"

- Choose a ball with an anti-burst system. The ball must be made of strong material that won't easily explode when punctured or pinched. If – by accident – you pinch the ball, the air inside must leak out slowly, never abruptly.

- Choose balls that can carry heavy loads especially if you're overweight. Some balls in particular can even hold more than 600 pounds of weight.