If there is a white plug inside your ball, you’ll have to remove it with a butter knife or other object like a key. If you are using an electric pump, flip the switch to inflate it. If you don’t have a plug, you’ll have to find replacement parts. When removing the plug, be careful not to puncture your ball. If your ball didn’t come with a pump, purchase one at your local hardware store.
The ball will be very firm at this point. If you pump up the ball completely at this point, instead of doing so gradually, it may end up egg-shaped instead of round.
If you are 4'11"(1. 49 m) to 5'6" (1. 67 m) tall you should get a 55 cm (1. 80 ft) ball. If you are 5'7″ (1. 70 m) to 6'0″ (1. 82 m) tall you should get a 65 cm (2. 13 ft) ball. If you are 6'1″ (1. 85 m) to 6′ 6″ (1. 98 cm) tall you should get a 75 cm (2. 46 ft) ball.
As you work out on your exercise ball, it will slowly deflate over time. Remember to keep the levels of air adequate as time goes on.
Store your ball at room temperature and don’t expose it to direct sunlight.
