Carve a Strong, Chiseled Core With These 30 Ab Day Exercises

Strengthening your core can improve your overall fitness abilities (like make you a more powerful runner or skier), can prevent injury or back pain, and improves your posture.

Whether you throw in an ab routine after a cardio workout, or you're devoting an entire day to your midsection, these exercises are a must! Be sure to do ab stretches afterward.