1. Make sure that your system version is iOS 15 or higher. If so, it may be because an application is using the fitness tracking function, and the data privacy setting of the application is incorrect. You can try to check whether there are any applications accessing your fitness data in the settings, and check the privacy policies and permission settings of these applications. If you find that an application misuses your fitness data, you can restrict its access to protect your data privacy.
2. If the problem still exists, you can try to reset all settings or delete and reinstall the application to solve the problem.
If the problem persists, you can contact Apple technical support or developers for more help and support.
Please note that the above solutions are for reference only, and the specific operation steps may be different due to factors such as equipment and software version. If you are not sure how to proceed, please refer to Apple's official support page or related documents, or contact Apple's technical support for detailed instructions.