When you grab a stress ball and squeeze it, many muscles work to perform this task, and when you release the ball, the muscles relax.
You don't have to work in a job where you are stressed out constantly to reap the benefits of using a stress ball.
People who do repetitive tasks with their hands, such as typing, can benefit from using a stress ball.
A stress ball can help alleviate the symptoms of this too.
Using a stress ball throughout the day can help to ward off the stiffness that occurs when you don't use those joints frequently.