I'm a Trainer: If You Want a Stronger Core, These Are the 11 Exercises You Need to Do

This is a posterior core exercise that will keep you from rounding your spine too much.

• Get on all fours, with your knees under your hips and your hands under your shoulders. Remember to keep abs engaged and keep your back flat.
• Reach out with your right hand and extend your left leg out behind you.
• Round your back and head to connect your right elbow with your left leg under your body. This completes one rep.