So these types of muscles break down ATP very slowly and that means the contraction speed of these muscles, the velocity at which these muscles contract is low. So these muscles basically contract relatively slowly. Now, the oxidative portion of slow oxidative simply means they use oxygen to basically form ATP. And that means the pathway of ATP production is aerobic. So they use not only glycolysis, but they also use the CReP cycle and the electron transport chain to actually produce our ATP. Now, because they have a lot of oxygen, that means they have a high concentration of myoglobin because myoglobin is the protein carrier that actually carries that oxygen in our muscle tissue.