Your Challenge:

Track at least 100 abdominal exercises each week.

Why Do This?

A strong core (which consists of the muscles in your abs and back) is important for supporting your spine and keeping your body stable and balanced.

• The Real-World Benefits of Strengthening Your Core from Harvard Health Publications
• Bad back? Try using a stability ball to take pressure off of your back and spine. Or, try an alternative to crunches: 10 Flat Stomach Alternative to Crunches

Daily Ab Workout FREE
(Free; iTunes and Android)

Pocket Yoga
($1.99 iTunes and $2.99 Android)

Daily Yoga for Abs
(Free; iTunes, Android)