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.
Slow twitch muscle fibres are good for endurance activities like long distance running or cycling. They can work for a long time without getting tired. Fast twitch muscles are good for rapid movements like jumping to catch a ball or sprinting for the bus.
The flutter kick uses all the major muscle groups in the legs. These include your gluteus maximus, quadriceps and hamstrings. Whether on your front or your back, you'll also use your calves as well as three muscles in your feet: the abductor hallucis, abductor digiti minimi and flexor digitorum brevis.