Intramyocellular fat globules near mitochondria in athletes indicate a high potential for fat oxidation.

“the marathon or Paradox if you do an em and you find a mitochondrial n network you'll see a fat globule right next to it so the potential for fat oxidation is great uh in our work we've done some uh m mrss and MRI and we've looked at athletes and um they don't use much fat during exercise but in the recovery period you know when glycogen is low that's the period of fat burning so those those fats there are um preconditioning prepositioning fuel supply in recovery when glycolysis switches off and people start to relax”