Assuming it was spread relatively evenly throughout the month, 159 hours of overtime means she basically worked 80-hour work weeks that month.[1] That's much less shocking than it seems at first glance, especially considering she was only 31.<p>I'm not arguing that it's healthy or wasn't grueling--her particular activities might have been particularly grueling, and perhaps there were other circumstances at play--just that I'm sure plenty of people here have worked 80-hour work weeks back-to-back.<p>10 years ago a colleague and I spent about 4 months only sleeping 5 days each week, working through the night twice each week on our "side project". Recently I've been working through the night once each week (including yesterday/today), though it feels more difficult now than I remember when I was younger. (FWIW, I'm one of those people who really needs and appreciates sleep--minimum 8 hours to feel normal. By contrast my father has only slept about 4-5 hours each night for his entire adult life, a superpower I've always been envious of.)<p>[1] According to Wikipedia (<a href="https://en.wikipedia.org/wiki/Japanese_labour_law" rel="nofollow">https://en.wikipedia.org/wiki/Japanese_labour_law</a>) anything over 40 hours/week is overtime.