A computing system receives, from a user device, a request to generate an estimated activity profile for a user of the user device for a workout. The computing system identifies route information for the workout. The computing system generates, via a trained prediction system, an initial estimated heartrate for the user based on a personalized training process for the user. The computing system generates, via the trained prediction system, a duration of a portion of the workout based on the route information and environmental information associated with a time and day of the workout. The computing system generates, via the trained prediction system, a projected heartrate of the user during the workout based on the initial estimated heartrate of the user and the generated duration. The computing system outputs the estimated activity profile corresponding to the workout based on the projected heartrate of the user.