The biggest difference, however, is training. Early in his career, George ran no more than ten miles per week. Even when he set his long-standing mile record, he was averaging just three or four miles a day. Mo Farah started his career at seventy miles per week and moved up to 120 miles. This enormous difference in total running volume masks an even greater disparity in low-intensity running volume. Of the twenty-five miles Walter George ran in a typical week at his peak, sixteen were done at low intensity. Of the 120 miles Mo Farah runs in a typical week, close to one hundred are done below
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