You have to introduce new challenges all the time,” she says. Alexia often uses a bosu ball for ab work. “If you don’t have a bosu ball you can do all of these on a mat! The bosu ball adds ...

Maintaining balance on the Bosu ball requires significant core strength. Your core muscles, including your abs, obliques, and ...

While at-home ab gadgets won’t help with fat loss ... It’s like the extreme version of a bosu ball (the half inflatable ball on a flat circular platform), except the central ball rotates ...