I'm pretty sure the results would be even more true for 12 hours workdays. I recently switched jobs and dropped from 40 hours to 35 hours a week and only feel

I'm pretty sure the results would be even more true for 12 hours workdays. I recently switched jobs and dropped from 40 hours to 35 hours a week and only feel much more productive from it. Working 70 hours week is a guaranteed way to have a mediocre productivity and quality of life. In the end you spend half your time fixing your own mistakes and waste the other half writing said mistakes. You're then much more vulnerable to anything listed in the article.