The arm swing is critically important for stabilizing the body when running. It is also an area where runners can often make major efficiency improvements.
RT @Cool_Running: Don't let your mind hold you back from reaching your running goals. Here's what you can do: http://t.co/vwo8cWiz1G Today
RT @runnersworld: Use this workout to fix common strength imbalances and stay injury free: http://t.co/rj8lJtQGqT Today
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@runnindmc1126 Your profile likely states you're in the drawing. 04 Dec