Don't get me wrong, I have spent money on sport, and it's been worth it. I've spent over thousands of dollars learning dance, yoga, playing tennis, basketball, etc. 其实我也花了很多钱去运动. 我花了几千块钱澳币学跳舞, 瑜伽, 打网球, 篮球等等.
But, if you want to save money, there are other ways of exercising (even while doing the same things as above) without spending any money. 但如果你要省钱, 你可以用其它方法运动, 甚至不用花一毛钱.
For exmaple, you could find a friend, and follow dance tutorials together on Youtube. This is my swing dance tutorial. 比如说, 你可以找一个朋友, 跟你一起学youtube上的跳舞课程. 这是我教的摇摆舞.
If you want to learn tennis, try playing against the wall. It's a workout that requires a lot of skill (novice players will usually hit balls over the wall), but you will learn soon enough. 如果你想学打网球, 可以跟墙壁打. 这需要一点技巧, 要不然球很容易飞过墙头.
Don't forget the exercises you can do at home by yourself or at a park around your house. There are plenty of fitness tutorials on Youtube. 别忘了自己在家里或公园里也可以做运动. Youtube上有许多运动体能教学视频.
Have fun doing some free exercise! 祝大家玩的开心!