Stand with feet together. Shift weight to right leg. Hold a weight in each hand down by sides. Keeping back flat, core engaged, and shoulders down and back, hinge at hips by sending glutes straight ...

Run faster and more efficiently with these moves.

Add Yahoo as a preferred source to see more of our stories on Google. When picking a workout app, first make sure it matches your activity. A runner is going to want something totally different from ...

Plus, exactly how to get results from whatever activity you love to do.