According to the university of minnesota extension you should use a bigger sized exercise ball.
Exercise ball size for desk.
If you re 5 feet 6 inches to 6 feet 2 inches then you ll need a 26 inch ball.
If you are of average weight and you are under 5 3 160 cm you should choose a 55 cm 21 7 inch diameter exercise.
They range in size and air pressure depending on your height and how you want to use it.
Measure your current chair and aim to have the diameter of.
Before you pick just any stability ball though find the best size for your height to get your core firing.
Over 6 feet and you ll need a 30 inch ball.
Inflate the ball until you can sit on it with your feet resting flat on the floor and your legs at a 90 degree angle to the floor.
Generally if you re 4 feet 8 inches to 5 feet 5 inches tall buy an 18 inch ball.
Here are the simple steps to achieve the right measurements when inflating an exercise ball.
Choose the right fitness ball for your height and weight.
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75 cm ball an exercise ball when size properly makes for an active chair when sitting at a desk.
Inflate the ball use the pencil mark to match the height of your exercise ball.
Exercise balls are large inflatable balls used during workouts physical therapy or as a replacement for your desk chair.
5 11 to 6 7 height.
Buy a burst resistant exercise ball.
So while for exercising purposes you would use a 45 cm ball if you are 5 feet tall for sitting at a desk you should use a 55 cm exercise ball.