The 8 Best Ab Exercises to Level Up Your Core Workout

This cardio move targets your core as well as the rest of your body — your shoulders are sure to feel it after just a few seconds.

1. Hold a lightweight dumbbell at chest height with your arms outstretched.
2. Run in place, driving your knees up toward your chest.
3. Keep your core engaged and chest tall while you drive your knees up.
4. Repeat for 30 seconds; rest for 30 seconds. Repeat for four sets.