If you are serious about your health, sleep is an essential
factor you should consider together with nutrition. If you are
exercising hard, eating well, but not taking sufficient sleep, you are
slowing down your progress.
During sleep your body goes into recovery mode. Not just physically, but mentally also. It's a chance for it to unwind and get everything ready for the next day. One or two late nights here in there might not do too much harm, but if you make a habit of getting to bed late and getting up early you will struggle physically and mentally sooner or later. It's just like a deck or cards waiting to fall.
During sleep your body goes into recovery mode. Not just physically, but mentally also. It's a chance for it to unwind and get everything ready for the next day. One or two late nights here in there might not do too much harm, but if you make a habit of getting to bed late and getting up early you will struggle physically and mentally sooner or later. It's just like a deck or cards waiting to fall.