A paper reanalyzing an athlete's history, including VO2 max tests and efficiency measurements over three years, showed an expected pattern of improvement from 74 ml/kg/min to 96 ml/kg/min, followed by a decrease.

“the aftermath was that there was a a paper published i don't know i think it was about a year ago that sort of reanalyzed or responded to when they published his data and said well let's look at not just his history of vo2 max values let's look at his efficiency at each point along the line so over the course of three or three years or whatever it was where he had multiple vo2 max tests and you see this expected pattern he starts at 74 and he goes 80 something 80 something 90 something 96 and then he comes back down”