What you eat is not directly proportional to your own exercise.
Because people's body is thin, because their own nutrients can't be supplied for their own digestion, which is not proportional to their own physical needs, and the body lacks the supply of nutrients. Because in summer, many people work all day and all night, and many people like to save the time for eating, so some people eat less and eat less, which leads to many people always lose weight in summer.
There are more leisure and working hours in summer.
You will always find that students' free time and workers' workload are relatively heavy in summer. In summer, students spend more time on entertainment. For example, when you play often, your desire to eat will decrease. The workers are very busy because they have a heavy workload in summer. Many workers want to save time for eating, so many workers like to eat in summer.
Why not eat in bitter summer? Because people don't want to spend more time eating in summer, students want to play, and people who work in society are busy with their own affairs. They think that they should not spend more time on eating, and should leave the time for eating for their own work.