The study found that people between the ages of 20 and 39 are more likely to use sports apps in smartphones, the main reason is that most of them have already taken part in work and sub-health is more common in this group. 
Many young people work overtime for a long time and don't get enough sleep
 more and more white-collar workers and young people pay more attention to their health; at the same time, the obesity rate of young people is relatively high, while young people pursue beauty far more than the middle-aged and elderly, so they care more about sports. In addition, users in this age group are also more familiar with the operation of smartphones.