A small difference in exercise ball sizes can make a huge difference in your your workout because during exercise you are using them in various positions. Although smaller balls can improve the effects of certain exercises and larger balls can provide support to your body weight if you have a bad back, choose the right ball depends on your personal height and arm size matters a lot.
In using your height in determining the right exercise ball sizes, the equipment should be level or slightly above the knees. The best way to size up the exercise ball is by sitting on it. While doing this, you need to bend your knees at a 90-degree angle and your thighs should be level with the floor. Find out your height and check which size that you should be trying first.
The following chart will help you to find the right exercise ball size depending on your height.
| Height | Recommended ball size |
| Under 4’8″ | 45 cm |
| 4’8” to 5’3” | 55 cm |
| 5’4” to 5’10 | 65 cm |
| 5’10 to 6’4 | 75cm |
related article: Dimensions of a Golf Ball
The best determination of whether the new ball is of appropriate height is on a sitting position. At an angle of 90-degrees, compared to your knees your hips are level or slightly higher. When the exercise ball is too small, you might compromise the position of your hips and pelvis when sitting on it. On the other hand, a ball that is too large will not provide opportunities for your feet to touch the ground, putting you in an unstable position. This is why it is important to achieve the right ball in order to have the right workout.
By calculating the length of your arms from your fingertips to the shoulder, we can also determine the right exercise ball size. Since the length of your leg may vary from that of other people, the arm span can accurately measure the right ball for you.
If the exercise ball will be used for several aerobic exercises and need to hold onto it, the arms cam also provide a better fit for your situaation. However, using this methhod might be a bit difficult (and require more time) as most people usually have more knowledge of their height than their arm span.
related article: Premier League Trophy Dimensions
If you still prefer arm span for determining the right exercise ball size for you, use this chart to help you find the right size.
| Arm Length | Recommended ball size |
| 22″ to 25-1/2″ | 55 cm |
| 26″ to 31-1/2″ | 65 cm |
| 31-3/4″ to 35-1/2″ | 75 cm |
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July 31st, 2010 at 9:31 am
I believe this is a great method to become fit for almost no cost. There’s a lot of gurus telling people to get all kind of weird equiment. Great post.