Hi, I did a Garmin exercise that consisted in warm-um and a combination of three times 15s@3:12 followed by 3m recovery. The screenshot below is zoomed-in to a sprint set chart from Garmin and what Runalyze recorder (laps 4, 6, and 8) Garmin Runalyze If on lap 8, I did 15s at an average of 2:47/km, ...