Another requirement of high-speed locomotion is that the ability to swing the limb rapidly and reposition it for the following stride. This can be smitten by several factors: the limb's inertia, the inner architecture of the muscles (elongated fibred muscle contain numerous sarcomeres in line permitting it to contract at a soaring pace), and also the muscle moment arm (helps make a bigger difference in the joint rotation). Cheetahs manage to display these several unique skeletal adaptations that, for the most part, functions to grow muscle moment arms when differentiating to the greyhound. The cheetah also obtains varying talar ridges which is considered an adaptation that can aid in preventing limp interference (Hudson, P.E., Corr, S.A., Payne-Davis, R.C., Clancy, S.N., Lane, and Wilson. 2011). The cheetah’s hindlimb bone is notably lengthier than that of a greyhound which allows it to obtain a longer stride.  Although greyhounds have similar body shapes as the cheetahs, these small differences such as the skeleton of the pelvic show great insights into how cheetahs have evolved and adapted in their environment which ultimately was the key factor that led the cheetahs to become the fastest animal on the planet earth.