Improve your running form by running faster for shorter distance runs. This will train you how to run in proper form and it will give you a great leg workout too. By improving your form, you can then prevent any kind of movements or jerking that could cause serious injuries.
Most people will work out until they reach a certain goal. For a lot of people, it is the amount that they can bench press. This is called maxing out, but you should not max out on a regular basis. You should test it out only once every month.
While playing any sport like basketball or baseball, you will notice that there is sometimes one or two finger that will constantly get jammed. When this happens, you should tape the finger to a neighboring finger and this will help to reduce the amount of jamming that will occur.