I really need to lose some weight.
我真的需要減肥了。
Why don't you attend an aerobic class?
你為什么不去參加一個有氧健身班呢?
It might be a good idea to join a fitness center.
您可以參加健身俱樂部。
You need to work out.
你需要去鍛煉一下。
I exercise every morning by jogging.
我每天早上做慢跑運動。
I go to the gym a lot.
我常去健身房。