When most people think of a strong core or achieving abs, the first exercise that comes to mind is often sit-ups. While ...

The simplest way to increase the difficulty of sit-ups is to add some weight. You can add a dumbbell, kettlebell or sandbag.

The classic sit-up is a workout staple. Whether you've become all too familiar with the movement in your weekend HIIT class or eked out those last few reps while following a home workout video, you've ...