Exercise of the Week: Plank Position with Feet on Ball

Difficulty: Easy to Moderate

Start: Lie on ball, face down. Place hands on floor and lift both legs to position body in a push-up (plank) position. Keep abdominals contracted (tummy tucked in) and spine straight.

Exercise: Walk hands forward, maintaining a steady plank position. Most difficult position: only feet are left on ball. Hold at finish position for 15-30 seconds. Walk hands back to start position. Repeat 3-5 times.