Psst! Here's a secret: If the thought of doing sprints on a treadmill makes you cringe, just remember to start out uphill. A few weeks ago I discovered what I consider the Holy Grail of tips for ...

When it's too hot to exercise outside, hopping on the treadmill can be a great form of indoor cardio. However, simply walking, jogging or running on a treadmill can become boring quickly. That's why ...