“One of the most common reasons for failure in the marathon is suffering from muscle cramping. As many seasoned marathon veterans know, these muscle cramps can be one of most frustrating reasons for a poor performance. Typically, when you suffer from a cramp, everything else is going pretty well. The pace feels easy, you’ve got plenty of energy, and a new PR seems almost inevitable. Then bang! Your calf cramps and it takes everything you have just to crawl to the finish.”
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