阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Why is swimming【小题1】 (benefit)to you? One of the key【小题2】(reason) is that it’s a total-body workout and builds your muscle all over. Each stroke(划水动作)works out a different set of muscles,【小题3】no matter which stroke you’re using, the act of pulling your body through the water almost【小题4】(use) all your muscle groups. Swimming is also a workout for your heart system,【小题5】(raise) your heart rate without placing extra stress on your body.

While running can have a negative effect on your bones and joints, swimming is【小题6】   (complete) safe, which gives you the opportunity to work out【小题7】stressing your joints. It’s true that the low-impact nature of swimming makes it much less likely 【小题8】 (cause) injuries.

According to a study conducted by New York University, swimming can cut men’s risk of dying by almost 50%, a rate which is significantly【小题9】(high) than running or walking. The study was undertaken over a period of 32 years, and【小题10】it was only conducted on men, there’s no real reason why the effects should be any different for women.