Yes. if you have a balanced, reasonably healthy life style it is absolutely doable. I am able to handle it in my early 30s. In my 20s with all the partying goin

Yes. if you have a balanced, reasonably healthy life style it is absolutely doable. I am able to handle it in my early 30s. In my 20s with all the partying going on it was sometimes a problem to stay focused 12+ hours on a single day book-ended by good rest.