For one thing, genetics doesn't really work this way. Another is that you would need the cardio vascular system of the cheetah, you would need the same sorts of

For one thing, genetics doesn't really work this way. Another is that you would need the cardio vascular system of the cheetah, you would need the same sorts of haemoglobin as the cheetah, the same respiratory system as the cheetah, the same sorts of fat and sugar metabolism as the cheetah. Gimping a human out with just one weird thing extracted from another species is never going to work. It's a bit like saying you can take a GPU from a desktop and put it on a Raspberry Pi. Ultimately yes you can, but its so non-trivial to the point you wouldn't bother.