Sure, the StairMaster is reliable for a slow-and-go booty burn, while the treadmill is tried-and-true for interval sprints ...

In this six-part series, we'll demonstrate quick exercises for different areas of your body every week to help you stay limber.

The hip flexors — the muscles that run along the front of the hip ... the hamstring when running or participating in sports. Do these exercises to help stretch and strengthen your hips and hamstrings.

Stand facing away from a box, bench, or chair. Place top of right foot onto the box with left foot about three feet in front, hands on hips. Bend left leg to lower into a lunge until right knee ...