For years, sit-ups were considered the ultimate ab exercise. But modern research shows they’re not the safest or most ...

Find out how many sit-ups after 55 signal a strong, healthy core and use this 60-second test to track your strength over time.

Strengthen your abs and obliques with this 12-minute core circuit that you can do anywhere without any equipment bar a yoga mat.

Does your back hurt after a long day at your desk? Do you wake up with a sore neck every morning? Muscle aches in your body ...