If you don't want to get fat ,you must find a f_ club空中应填什么

If you don't want to get fat ,you must find a f_ club空中应填什么
If you don't want to get fat ,you must find a f_ club空中应填什么

If you don't want to get fat ,you must find a f_ club空中应填什么
fitness

fitness club 虽然fitness是名词，但是跟club连用就是健身俱乐部。外国人都是这样说的，不必要用形容词。应该属于固定搭配吧。。。
还有类似fitness shoes，fitness center之类的短语。