When you are following a marathon training plan, tired legs and occasional soreness may feel like part of the deal. But there is a difference between muscles adjusting to increased mileage and pain signaling that something is wrong.
Read MoreWhen you are following a marathon training plan, tired legs and occasional soreness may feel like part of the deal. But there is a difference between muscles adjusting to increased mileage and pain signaling that something is wrong.
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