How Often Should You Fuel During Long Runs?

Photo: John Segesta

Learn how to improve the critical fuel efficiency element of the marathon while maintaining consistency in your training.

Running coaches and exercise physiologists have long debated the potential benefits and possible disadvantages to performing long runs during marathon training on an empty stomach or fully fueled. Unfortunately, scientific literature hasn’t provided runners with a clear cut answer to that question. However, by looking at the available evidence, and combining that with practical examples, we’ll show you how to use both in your training to maximize performance.

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