Start in a plank position with your hands flat on the step, slightly wider than shoulder-width apart, core engaged. If you ...

All runners can benefit from single-leg exercises (also called unilateral exercises) - they are great for highlighting any muscle imbalances and improving your balance and core stability. Why? By ...

Place your right foot on the step, then bring your left foot up to meet it. Step back down, leading with your right foot.

Add Yahoo as a preferred source to see more of our stories on Google. With New Year's resolutions on everyone's mind, you might have given some thought to whipping yourself into fighting shape. There ...