Unfortunately, you can't just insert a bike pump into an exercise ball and start filling it. If you do, you'll quickly find out that it doesn't fit. A bike pump valve and a sport ball valve are completely different, so you can't efficiently pump air into a ball without most of the air escaping.
If you plan to use your bike pump with an exercise ball, you will need to purchase an adapter. This must be purchased separately, but is relatively inexpensive. The adapter will plug into the end of your bike pump, allowing you to quickly fill your exercise ball with air.
See the plug on the exercise ball? how big is it Does it look like a needle pump or nozzle is needed?
If you're not sure how you should fill it, your best bet is to get a pump kit that includes several parts. This will save you from having to make multiple trips to the store to find the perfect fit.
Take your bike pump and unscrew the pump. Make sure to store it in a safe place and don't lose them!
Now take the correct sports ball pump nozzle and screw it onto the pump. To save time, we recommend testing the suction head before installing it on the pump.
You should now be able to pump the exercise ball normally.