When I was in my early 20s, I was able to work (programming) for several days a week without sleep. Non stop programming. I'm now in my early 30s, and whenever I stay late programming, like half a night, I feel like my brain will explode. Forcing myself to think hard when I'm too sleepy causes me physical pain and I feel like I'll get a stroke or something. While in my early 20s I could push myself as hard as possible against sleepiness and plow through anything.
What is the reason for this? What has changed? A bit more details than "you're older" would be appreciated.
What is the reason for this? What has changed? A bit more details than "you're older" would be appreciated.