Because the gym usually opens at 9: 00 in the morning, there are definitely not many people in the morning. People usually don't leave work at four o'clock in the afternoon, and there are not many people. They start work at 6 o'clock in the evening, and most people choose to exercise at night, so there must be many people, especially gyms with swimming pools, which are generally crowded and treadmills are full. To sum up, there are the most people from 6: 00 to 8: 30, and I hope to adopt them.