Well, when these exercising cells are carrying out more metabolic processes, that means they actually require more oxygen to create the ATP molecules via the process of cellular respiration. So that implies when these exercising muscles produce more ATP, they use more ATP. So that means they need more oxygen. And so the hemoglobin inside the blood plasma must be able to unload and release that oxygen with a greater likelihood. So that also means that the hemoglobin must bind to oxygen much less likely in order for the oxygen to actually get into these exercising cells. And that's exactly why when we have a higher temperature of the blood plasma, the hemoglobin becomes less likely to actually bind to oxygen and much more likely to release and unload that oxygen into this exercising tissue.