1. When friends use QQ Health APP to exercise, the steps will be automatically synchronized to QQ space and QQ friends leaderboard. If your friend's steps are not synchronized with QQ space and QQ friends list when using QQ Health APP, then his steps will not appear in your friends list.
2. System error: The statistics of steps in QQ friends' movement are based on the data of mobile phone sensors, and there may be errors. For example, when the mobile phone is moving or vibrating, the sensor may misjudge the increase of steps.
3. If your friends use third-party software to count steps, the data will also be synchronized to QQ space and QQ friends list.