Exercise not only improves your appearance, but a {#blank#}1{#/blank#}improves your health. Health experts(专家) advise people c{#blank#}2{#/blank#} physical activities that they find fun. So, what are some of the most popular forms (形式)of exercise in the USA?

    Walking tops the list. It is considered to be the casiest way to get exercise. You can walk at any time and any p{#blank#}3{#/blank#} Walking is also said to be the least harmful to the knees and feet. So, it's a w {#blank#}4{#/blank#}choice for the old.

    A{#blank#}5{#/blank#} popular form of exercise is jogging. In the 1970s, Bill Bowerman brought jogging to the USA. He did so after seeing the popularity of the activity during a trip to New Zealand in the 1960s. He started the f {#blank#}6{#/blank#}jogging club in America. He also helped find Nike.

    Swimming is also very popular. It was the second most popular sporting activity in America in 2008. The top activity was walking. When one is swimming, the w {#blank#}7{#/blank#} body is put to work. It is said that swimming is good for people w {#blank#}8{#/blank#} special needs, like pregnant(怀孕的)women.

    Dancing can also be a fun way to exercise. This is especially true for those who see exercise as something that they should do. A dance fitness programme c{#blank#}9{#/blank#} Zumba(尊巴)has grown in popularity in recent years. It was created by Alberto Perez in Colombia in the 1990s. In 2001, he brought the programme to the USA. S{#blank#}10{#/blank#} then, it has spread around the world.