If You Do 1 Workout, It Had Better Be This

Bringing the knee toward your elbow while holding the plank is an effective way to work the obliques and tone your muffin top.

• In a plank position, bring your left knee to your left elbow; then return the left leg back to plank position. Repeat this action on the right side to complete one rep.
• Do 15 reps to complete a set.