The present disclosure generally relates to user interfaces and techniques for monitoring fitness activity. In accordance with some embodiments, user interfaces and techniques for transitioning between a user interface mode for measuring an activity metric to a user interface mode for measuring a different activity, based on detecting that a user characteristic has changed, are described. In accordance with some embodiments, user interfaces and techniques for measuring activity data and providing activity commentary in response to activity-based events, where different activity commentary is provided based on a characteristic of a user, are described.