I'm aware how VO2Max will be calculated in a lab. But a powermeter is a closer approximation since the effort is captured. In cycling, if you don't have a power

I'm aware how VO2Max will be calculated in a lab. But a powermeter is a closer approximation since the effort is captured. In cycling, if you don't have a power meter the estimate would be based on distance and climb and won't factor wind or other external factors. Also, I know it's definitely greater than the Watch estimate. With a below average cardio I can't bike the distance or climb I do on average. I did 3 metric centuries last year (with climbs over 4000ft each), for example.