As is revealed in the above line chart, the number of fitness enthusiasts has witnessed an incredible increase from 50 million in 2007 to 500 million in 2017, an encouraging issue worthy of close attention. 　　Why has fitness attained such popularity nowadays? Several reasons contribute to this phenomenon. Above all, exponential growth of economy makes increase in wealth possible for more people, which allows them to seek extra enjoyment beyond material needs, like sightseeing, fitness activities, etc.. What is more, hightened awareness for health prompts more people to go into gyms. They are fully convinced that health is wealth and better health can produce bigger wealth. One more noticeable reason is that engagement in fitness offers an excellent opportunity for alleviating pressure. 　　With more and more people attaching importance to health and stronger consuming power becoming possible, it is predictable that in years to come fitness will greet a brighter tomorrow.