After a workout, runners replenish the glycogen they depleted during a workout through food and food supplements.Since the average workout of professional runners is more than two hours long, glycogen stores and large amounts of fat will be depleted. This is that moment when you “hit the wall”. After it depletes its glycogen stores, which happens on average after 90 minutes of running, the body starts using fat as a source of energy. During the first 90 minutes of running, the body uses glycogen as fuel (stored carbohydrate stores in muscles and liver).This way of training enables the body to regularly remove fat, and have no time to store it because: Elite runners exercise at least 6 days a week and their workouts on average last longer than 2 hours. One of the main reasons why runners are very skinny is their training habits. They exercise often, and their workouts are long This results in more efficient and endurant but leaner muscles.īelow I will explain in detail why are runners so skinny. After long runs, the body depletes its glycogen reserves and uses fat as a source of energy. Generally speaking, runners are very skinny due to the way they train. In this article, I will answer the question of why are runners so skinny, as well as some other similar questions. You watched an athletic competition or have been to a marathon and you have noticed that all the best long-distance runners are so skinny.
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