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.
The flutter kick uses alternating leg movements to propel a swimmer through the water. The flutter kick is the kick of choice for swimmers performing the backstroke, which is also called the back crawl, and the freestyle, which is also called the front crawl.