Training protocols that involve powerful contractions followed by relaxation periods allow for muscle recovery and utilize myoglobin-bound oxygen and creatine phosphate for fuel.

“you have this really powerful contraction of the muscles that are used in your sport and then there's that relaxation during which the muscle recovers is it's my globin oxygen that there's a small amount of oxygen in the muscle and it requires that creating phosphate fuel that is used for the short term”