VLamax playground The VLamax playground is built as an educational tool and showcase for the concepts behind VLamax and has several interactive charts that help to understand it. Heartrate power model dashboard The heartrate and power model dashboard calculates a model for the relationship between your heartrate and power output by uploading a FIT file. -- temporarily unavailable -- The Sweat Notebooks The Sweat Notebooks is an application that connects to Strava and generates advanced analysis reports from your workouts.