About halfway through the article, I'm trying to understand how they measure energy usage.<p>When I herniated a disc, because my hamstring atrophied, because I got a knee scope, I could not find a single doctor or physical therapist to explain it and such straightforward words, I had to do months and years of research myself to figure out what was happening. I probably saw a good 8 to 10 different "professionals" on this.<p>This taught me to not trust doctors. They're probably slackers and they probably don't care.