Playing sports can be fun, but it can also be dangerous if you are not careful. You can help prevent injuries by
Getting a physical to make sure you are healthy before you start playing your sport
Wearing the right shoes, gear, and equipment
Drinking lots of water
Warming up and stretching
If you have already hurt yourself playing a sport, make sure you recover completely before you start up again. If possible, protect the injured part of your body with padding, a brace, or special equipment. When you do start playing again, start slowly.