Methods and apparatus, including computer program products, are provided for analyzing heart rate data for a fitness or health device. In some example embodiments, there may be provided an apparatus that includes at least one processor and at least one memory including program code which when executed configures the apparatus to at least: receive, from at least one heart rate sensor, a heart rate data set collected from a subject over at least one session； filter the heart rate data set to remove at least one heart rate value failing to satisfy a predetermined duration threshold； determine a minimum heart rate value from the filtered heart rate data； and provide the determined minimum heart rate. Related systems, methods, and articles of manufacture are also described.
