What distance is used to measure VO2 max?

VO2 max is typically measured during a graded exercise test that involves running or walking on a treadmill or cycling on a stationary bike. The distance can vary, but a common protocol involves assessing performance over a set distance, such as 1 mile or 1.5 miles, or through incremental increases in speed or workload until exhaustion. The measurement can also be derived from specific time trials, like a 12-minute run, where the distance covered is used to estimate aerobic capacity.