Athletic Performance Monitoring System Utilizing Heart Rate Information

Athletic activity may be monitored using heart rate in addition to or instead of other types of metrics. Accordingly, multiple different activity types may be compared based on heart rate information. Additionally, the heart rate information may be visualized by displaying the heart rate data over time or relative to pace or distance. Additionally, the system may allow a user to analyze his or her heart rate performance by identifying one or more portions of the athletic activity in which a user exhibited a specified range of heart rates. Athletic activity sessions may further be tagged with various indicators including weather, terrain, difficulty and intensity. According to one or more aspects, data for different types of activity metrics may be polled and/or transmitted to a system at different rates or based on different schedules. Moreover, users may specify whether sensed data may be uploaded, recorded and/or visualized prior to or during an activity session.