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.
Well, it depends on what type of run you are doing. Each type of run (see below) works your muscles differently and and may target one group more than the other. Also, the type of muscles you have can make a big difference in which distance you excel at. Typically, people with a higher percentage of fast twitch muscle fibers do better at sprints and other things (weight training, etc) that require short bursts of energy.