Side Crunches on Stability Ball
Start by sitting on top of the stability ball with your feet shoulder-width apart on the floor. Walk your feet out until the ball supports your lower back.
Hold your arms straight out to the sides or behind your head. Engage your core to keep your balance on the ball.
Slowly lean toward your right side, lifting your right hip off the ball. Only go as far over as you can while keeping your left hip on the ball.
Contract your right oblique muscles to crunch up and lift your right shoulder and rib cage up off the ball. Make sure you're not pulling on your neck.
Pause at the top of the crunch, then slowly lower back down, maintaining control and keeping tension on the obliques.
Repeat for the desired number of reps, then switch to crunching to your left to work the other oblique.
Go slowly and focus on good form rather than speed. Make sure you're leaning far enough to feel it in the obliques, not just the rectus abdominis.
For added difficulty, hold a light dumbbell in the hand on top or do variations like diagonal or rotational crunches.
