Run faster and more efficiently with these moves.

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Whether you should choose incline walking, running, or both depends on your goals and risk of injury. Here's what to know about these exercises.

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 ...

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