To mention an athlete in the activity comments, enter the ‘@’ symbol and begin typing the name of the athlete you wish to mention. You can then select the athlete's name from the list that is displayed.
Mention Notification Settings
It’s possible to customize your mention notifications by accessing your settings in the mobile app and the Strava website. You can choose to receive no notification, an email notification, a notification in the app, or both an email and notification in the app each time you are mentioned. Android users can adjust both mobile and e-mail notification preferences in the app, while iOS users can adjust mobile notification preferences in the app and e-mail notification preferences in their settings on the Strava website.