Á¦ ¸ñ    PMlTDMeWKVKVLDUyWGi ÀÌ ¸§    Maria ³¯ Â¥    2018/06/29 Á¶ ȸ    1 What company are you calling from? optimum nutrition pro bcaa What you want is for fat to also help you at higher speeds, which means working on a boost to your oxygen capacity, or VO2max. After all, the higher the "max" from which the 70% is figured, the more fat energy you'll use in racing. An élite marathoner may zip around that 26.2-mile course at a relatively modest 75% of a lofty VO2max, and nearly a third of the fuel burned will be fat.