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.

A lot of people avoid doing sit-ups because they don’t feel like they have enough core strength to do the move without ...

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

Seated exercises can train the deep abdominal and spinal muscles without floor sit‑ups. With your pelvis supported by the ...

President Donald Trump signed an executive order Thursday reviving the Presidential Fitness Test, the once-ubiquitous school program that for more than five decades had American children running miles ...