Andrew Coggan, coauthor of Training and Racing with a Power Meter, runs through the tests that he did with his Moxy to convince himself that it measures what it’s supposed to measure. The conclusions section is a great 1 minute summary that starts about 36:25.
Clink Friesen describes the testing that he’s done with Red Bull Project Endurance. Red Bull puts on a camp for several of its endurance athletes once a year to help them learn more about their physiology. One of the hallmarks of the camp is that the athletes are tested at sea level in Death Valley and then tested at altitude on Mammoth Mountain to see how that affects their performance. Clint comments on how athletes with different limiting systems respond differently to altitude.