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Phelps has a body particularly suited to swimming. He has a long, thin torso with arms which span 6 feet 7 inches (200 cm), disproportionate with his height of 6 feet 4 inches (190 cm).[10] However, he has relatively short legs which reduce resistance through the water,[11] but despite this he has size 14 feet (49.5 Europe) and double-jointed ankles. He can extend his ankle beyond the point of a ballet dancer which enables him to whip his feet for maximum thrust.
According to an article in The Guardian, Phelps eats around 12,000 calories each day, or about six times more than the average adult male.