In one experiment, the researchers investigated the level of physical activity of the subjects and analyzed the average amount of time they spent sitting every day. The results showed that sitting for too long (more than 5 hours) was closely related to the shrinking of the medial temporal lobe of the brain, and even if the body reached a high level of activity at other times, it could not change the trend of shrinking the temporal lobe. 
Some people with poor memory do not exercise often and prefer to stay at home
 sitting for a long time can have an effect on people's memory.