Squats on a BOSU ball
The BOSU ball – half exercise ball, half flat platform – can add an element of instability to your workout. But doing squats or other moves while standing on the rounded side of the ball may actually set you up for injury.
“Unless you’re a top athlete you’ll likely have worse form,” says Lindsey Wismer, a personal trainer and nurse practitioner at Merritt Health and Wellness in Portland, Oregon. Your knees and ankles may roll in or out, causing a breakdown in alignment all the way through your body. Stick with traditional squats or wall squats, where you have your back against a wall and your knees directly over your ankles, until you are ready to advance the move.