I’m a 4:05 1500m runner and I just bought the lactate pro 2 meter . I did a threshold session of 6x5min @3:32 km pace while testing my lactate after every 2 reps. The first 2 reps it said 6 mmol/l and the last 4 reps it said 23.0 mmol/l. I feel like this is a little high for the pace I was running at. Does anyone know if this is right or do I need to calibrate the meter or something a long the lines of that