Many people with pent up anxiety will engage in sports such as football, baseball, or tennis.
Stress builds up a great deal of pent up energy that needs to go somewhere.
The wonderful thing about any art form is that it allows you to release pent up feelings without having to follow "the rules".
Stress can zap your energy, but when your body releases pent up adrenaline during exercise or excitement, your body releases oxygen and gives you a natural boost.
Even the most expensive stress ball is typically less than $10, and many novelty stress balls are less than $5, making them an inexpensive way to squeeze out your frustrations and relieve pent up stress in your wrists, hands, and fingers.