Almost every gym has a gym ball (AKA Swiss, exercise or stability ball), but you rarely see it used. That’s a pity because it adds another dimension to core exercises.
“One of my favorite reasons for using the Swiss ball is how much it challenges your stability,” personal trainer and online coach Tess Glynne-Jones told Coach. “It means that your core is having to work that little bit harder in order to prevent you from falling over.”
