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.
This stroke recruits the chest muscles, the lats, and other back muscles. Because this exercise requires rapid movement of the arms, going from above the head to down by the sides of the body, you'll tap into your fast-twitch muscle fiber potential, leading to improvements in speed and power.