The best Lab we have found in the SF bay area is at UC Davis. I you read the article on Adrian Ballanger here: https://uphillathlete.com/adrian-ballinger-and-everest-everestnofilter/
That is where Adrian was tested. The know just what kind of test to perform.
Ask for their Metabolic and Lactate test found here: http://www.ucdmc.ucdavis.edu/sportsmedicine/programs/physiological_tests.html