21 Day Arm Sculpting Challenge It’s and I’ve got a new fitness challenge to kick it off. It’s a 21 Day Arm Sculpting Challenge from Popsugar. Strong arms are a must! It helps us get through daily tasks such lifting, pushing,.
The Superman ball lift is a butt-challenging variation on your standard Superman: Lie on your belly, and hold an exercise ball between your feet. Engage your abs, and extend your arms straight out in front of you. As you inhale, squeeze the ball