When most people think of a strong core or achieving abs, the first exercise that comes to mind is often sit-ups. While sit-ups have long been a go-to for strengthening the core, they're not always ...

What are sit-ups, and why are they a high-risk exercise? An abdominal endurance training exercise, sit-ups help strengthen, tighten and tone the abdominal muscles. It is often done by gym-goers who ...