Running Twice a Day Can Help You Tackle Major Mileage—Here's Why All Runners Should Double Up

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Running Twice a Day Can Help You Tackle Major Mileage—Here's Why All Runners Should Double Up

PM jog. Two with tot. Dub. Those are just a few of the titles entered into my training log for the second run of a day. Doubles, you might be thinking, are limited to pros and serious runners who are ...