From the research I’ve seen regarding output at given weekly hours, you cannot sustain productivity beyond 40hrs/wk for more than a month. At some point product

From the research I’ve seen regarding output at given weekly hours, you cannot sustain productivity beyond 40hrs/wk for more than a month. At some point productivity lowers such that, at best, productivity matches what previously only required 40hrs/wk. At worst working tired creates more work than it solves. Further more, the research I’ve seen suggests that those most likely to be doing negative work are the least likely to recognize it. Couple this with how hard it actually is to measure productivity, and you can end up with some personalities that are convinced the only way they’re as successful as they are is because of the hours that they can easily measure, and maybe don’t realize they’d be equally effective with fewer hours. That said. I suspect much of the research is only focusing on single work types. Like 40hrs doing thought work or 40hrs doing mindless manual labor. And I have suspicions that you can increase effectiveness by doing tasks that give breaks to you brain or you body and that might get you to 60hrs/wk without burnout. Beyond that though, I’m skeptical. People need time to rest. Bodies have recovery processes that can’t necessarily be sped up, and the brain definitely has rate limits on flushing byproducts of various processes, and muscles take time to recover due to similar rate limits.