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 ...

Master these classic core exercises (they're not the same!). Javier Zayas Photography/Getty Images If you’re a fan of core exercises, chances are both sit-ups and crunches are a staple of your workout ...

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 ...

Slam balls are unique thanks to their ability to endure a ton of force. You can literally slam or throw them—against the floor or any other hard surface—with all your might, to your heart’s content, ...