Welcome to Start TODAY. Sign up for our Start TODAY newsletter to receive daily inspiration sent to your inbox — and join us on Instagram! A strong core helps with posture, balance and stability ...

However, it is easy to perform a sit-up incorrectly, and when the manouvre is not done right it can result in spinal problems that can prove irreversible. The head and neck muscles should be ...

Sit-ups require you to lift all the way up ... Be sure to clasp loosely, so you don't pull on your neck during the move. Slowly curl your shoulders up off the floor to about a 30-degree angle.