This visualization plots cycling workout sessions, showing power output in watts against elevation gain (dénivelé) for a rider's training data. Each circle’s radius represents the average speed, allowing viewers to compare performance across different climbs. It fetches JSON data from the Velobook API and renders it as an SVG scatterplot using D3 v5. The chart includes interactive hover tooltips that display the power, elevation, and speed for each workout. Axes are scaled linearly and labeled clearly, with grid lines and a title "MMP by Dénivelé" indicating maximal minute power relative to climbing difficulty.