Your vital capacity needs exercise, whether it's running or riding a bike, it will have obvious effect if you persist for a month or two. I am also a cycling enthusiast. I suggest you ride a bike. However, don't go to the gym to ride a spinning bike, buy your own car. Two or three thousand entry-level bicycles are enough, which is similar to the price of your gym annual card. The biggest advantage of outdoor cycling is that you can see the scenery everywhere while exercising, especially spending more than an hour riding on a mountain hundreds of meters above sea level and looking down from the top. At that time, the mood is definitely not what you can experience when you exercise in the gym. Then you will never forget the refreshing feeling when you go down from the top of the mountain. Of course, outdoor sports are more dangerous than gym sports. Therefore, if you choose outdoor sports, you must bring your equipment and consult the bicycle shop for details.