VO2Max

(maximal oxygen consumption) The maximal amount of oxygen that a person can extract from the atmosphere and then transport and use in the body's tissues.
Found on http://www.runnersworld.com/article/0,7120,s6-238-267--439-0,00.html

VO2max

Also called maximal aerobic capacity; maximum amount of oxygen that can be utilized by the body; higher V02max generally equals better performance; can be improved with training but has a genetic limit
Found on http://www.howtobefit.com/glossary-of-running.htm
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