Kenneth H. Cooper conducted a study for the United States Air Force in the late 1960s. One of the results of this was the Cooper test in which the distance covered running in 12 minutes is measured. Based on the measured distance, an estimate of VO max (in mL / ( kg min) ) is:

Based on this passage, what is the unit of measurement for vo2max? Let's give stream of consciousness first:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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To answer this question, we should know that: Based on the measured distance, an estimate of VO max (in mL / ( kg min) ) is:
So, the final answer is mL / ( kg min.