If You're on a Mission to Get Stronger Abs, a Celeb Trainer Said to Do These 3 Exercises

• Begin in an elbow plank with your feet slightly wider than your hips to create more stability.
• Reach your right arm straight out with the thumb pointed toward the ceiling. Return back to elbow plank, and reach your left arm out. This completes one rep.

Jason's tip: don't let your hips move as you lift up your arm.