Their body has to be adspted for high speeds. First of all large nasal pssages, lungs and heart allow the animal to getmore oxygen to it's muscles. After a cheetah has excerted all this energy in running so fast they must rest for thirty minutes before they can procede. After all they are real creatures. A second adaptation to speed is that thier tail muscular acts a steering wheel during a high speed chase.
Cheetahs have a flexible spine which is used as a spring to jump higher and run faster.
Cheetahs have good brakes because oftheir hard, sharp toe pads which are like cleats and thier light bones let them glide through the air. Futhermore, blunt claws give the cheetah traction and they always keep thier claws worn down because they are not protected bya sheet of skin.