This study should be taken as an experiment. If those participants had been building up and down for years on end the results would show differently. When I first started to sit then stand, yes tired more easily. But then as years progressed, my own personal hampster wheel exists anywhere and everywhere. The point should be: MOVE YOUR BODY A BALANCED PORTION OF TIME. Personally, when on silly long cycles, I sit stand work dance, building every way. If the beats not cranking, it's a posture focus war from looking down, typically the screen is fixed as I'm either looking slightly up or down at it.