What are stress balls used for?
A stress ball or hand exercise ball is a malleable toy, usually not more than 7 cm in diameter, which is squeezed in the hand and manipulated by the fingers, ostensibly to relieve stress and muscle tension or to exercise the muscles of the hand.
Are stress balls good for you?
“The action of working with a stress ball helps improve strength in the hand and forearm muscles, grip, and circulation, and can help alleviate pain such as pain associated with arthritis in the hands,” he says. According to Gallucci, these physical benefits translate into mental perks too.
What is the liquid inside a stress ball?
Both stress balls and squishies are made of polyurethane, a “polymer” that forms when its component “monomers,” namely isocyanates and polyols, are linked together into long chains.