run
u use your upper leg muscles.
No.
When You use A set of muscles,The blood flows to them so you can exersice longer.
They Are Fast Because They Run A Lot And Their Leg Muscles Get Stronger.
Exercise and strengthen leg muscles and cardiovascular system.
so they can still run, and catch prey
you can build your leg muscles multiple ways but the best way is doing squats. You can also run and that builds leg muscle and helps your cardio.
The hamstrings are comprised of three muscles on the back of the leg that run from the bottom rear of the pelvis to alongside the knee.
When a runner uses her leg muscles to run, she is primarily using skeletal muscles. Skeletal muscles are under voluntary control and are responsible for movement by contracting and relaxing. These muscles work in coordination to provide the strength and agility needed for running. In addition to skeletal muscles, some smooth muscles may be involved in regulating blood flow and digestion during exercise.
sciatic nerve
because most people, which of course if you are running correctly, are moving most of your leg muscles and your heart rate is increasing. You are cutting down on air