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TODAY IS YOUR TRACK WORKOUT: RUN 3 REPEAT MILES AT 70% MHR: Many runners do not effectively incorporate their arm swing into their running style. For example, women typically hold their arms high and tight to their chests. Roughly 10% of your running efficiency comes from using the arms properly to maintain the rhythm of the legs. Swing your arms freely as you run, and keep them relaxed. The faster you run, the more your arms should swing in a plane perfectly parallel to each other.
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