Selecting the Correct Exercise Ball
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 Selecting the correct size of an exercise ball will ensure that you are able to perform exercises from an optimal position and posture.
While sitting on an exercise ball:
- Feet should be flat on the ground with your knees and hips bent to 90º. Thighs should be parallel to the floor or slightly slanted down.
- Maintain alignment of the ears over the shoulders and pelvis.
Exercise balls are available in five different sizes. This chart provides general guidelines for selecting an exercise ball.
Diameter of Exercise Ball |
Height |
45 cm |
5' and under |
55 cm |
5'1"– 5'8" |
65 cm |
5'9"– 6'2" |
75 cm |
6'3"– 6'7" |
85 cm |
6'8" and taller |
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If you are overweight the ball will compress more and you may need a larger ball than our chart indicates. Consider obtaining the next size up if your body weight is significantly more than average for your height.
To decrease stability and increase the challenge, put enough air in the ball to make it tight. To increase stability and decrease the challenge, let some of the air out. As a ball is used it will stretch and lose pressure. This will increase the stability of the ball. Periodically you will need to re-inflate your ball to maintain the appropriate amount of air pressure.
For further information you may contact the manufacturer of your ball or your chiropractor, trainer, therapist or other health care provider.
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