There is no such position as Mayor of the United States (US). A  Mayor is typically a political position for cities and towns. The  United States is led by a president. Curr â¦ ently, the president is  Barack Obama.
Fast-twitch muscles. Fast-twitch muscles use an 'anaerobic' metabolism to create fuel and need more oxygen, and they are much better at generating short bursts of strength or speed than slow muscles, such as a 100 metre sprint or weightlifting, but they tire more quickly.
In addition the thigh flexor muscles are also the primary muscle group responsible for sprinting speed-so by conditioning your thigh flexor for speed you will see dramatic improvements in your sprinting speed as well as your kicking abilities-even if you are already a top performer.he speed comes by conditioning the fast twitch muscle fibers in your leg muscles to perform what is called a 'fast twitch response' â which basically means to contract with speed and acceleration. The bottom line is you cannot condition your muscles for speed using the same techniques you use to train for strength.