I studied in the United States, but not Stanford, but also in the top 50. Most boys in the United States take outdoor running as their main fitness activity, supplemented by equipment training. Girls mainly run on indoor treadmills and outdoor treadmills, but most of them run on indoor treadmills with few training equipment. However, yoga has become more and more popular with girls in recent years. There are also a few swimmers (mainly older doctors over 30). Generally speaking, Americans exercise more frequently than China. Those who have fitness habits will go to the gym at a fixed time every day, mostly not less than 1 hour and controlled within 2 hours.

As for the Hong Kong Special Administrative Region, my classmates in Hong Kong said that Hong Kong people generally do not have strong exercise habits.