Fat oxidation in short time trials

[sryke]

@old_but_not_dead_yet

What limits the rate of fat oxidation anyway? Why can’t we exercise at 100% of VO2max without oxidizing carbohydrate?

Couple of reasons for that but one main reason is that fat can’t get into the muscles quick enough. The transport is limited and not as efficient as with carbs. However, if you’re trained you’ll have plenty of intra-muscular fat. The increase of this store is one of the key adpations of training. And this is why you see a higher fat oxidation at higher intensities in trained individuals