I can relate to this article. I go to bed at 1am and get up at 5:45. I prefer to be at work by 6:30am and work solid 12+ hour days, with ideally a gym session m

I can relate to this article. I go to bed at 1am and get up at 5:45. I prefer to be at work by 6:30am and work solid 12+ hour days, with ideally a gym session mid-morning, a run at lunchtime, and 2-3 hours more sport in the evening. Dinner is often at 10:30pm. Basically, I can go all day at full speed and never get tired from mental or physical effort. I'd pack even more into each day if my partner would let me. Sometimes I worry my body will break. That rarely stops me though, so long as I get 4.5 hours' sleep. Less than 4 and my concentration span is reduced, I get susceptible to colds and am more easily irritated. Clearly there's a genetic difference here. I count myself very lucky for my extra productive hours.