I think it's a combination of youth and dedication that helps people push through such harsh circumstances. There was a time in my life when I would only sleep

I think it's a combination of youth and dedication that helps people push through such harsh circumstances. There was a time in my life when I would only sleep for 4 hours a day 2am to 6am and I did this for 2 years. Some good things were that I didn't work during the daytime, only studied, and I had access to very good nutrition. If I look back even I marvel at how this is even possible. But I was very young and super passionate back then. Definitely can't do it at this point in my life.