I'm 5'9.
Answer:
Check out Thera Band balls. Amazon has them and they have there own site. You will need probably a 75CM but those two sites well be able to tell you. Thera band is the best to buy . I have had mine for 5 years and still going good. The ones at walmart etc are cheapos.
The perfect ball size for exercises that require you to sit on the ball is dependent on your height. When sitting on the exercise ball, knees and hips should be at 90 degrees. For exercise ball exercises that require you to kneel or stand on the ball, a larger ball is better. You may slightly inflate or deflate the ball if you feel you are between sizes. Using different sizes of balls will allow you flexibility and variation as you progress with the exercise ball exercises.There are no hard and fast rules. Using different size balls will allow you more flexibility and variation with your exercise ball training.Try the site http://www.exercise-ball-exercises.com... for all kinds of ball information.Hope this helps.
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