Carbs, not fats, boost half-marathon race performance

Recent studies have proposed that burning fat instead of carbohydrates will improve exercise performance because the body’s fat reserve is much larger than its carbohydrates reserve. A new study reports the opposite, finding that muscles rely on carbohydrates as their fuel source during prolonged exercise.

from Fitness News — ScienceDaily http://bit.ly/1UvjNSY
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