I'm in my 40s now, been coding mostly 80-100 hours a week since I was in my early teens, and I've not noticed much difference so far.
At one point in my late 30s I let myself go for a bit; too many brunches, too many happy hours. I started feeling a bit more sluggish and told friends I was feeling older. I'd put on a bit of weight. I went on a diet for a bit and lost the weight, and suddenly, magically, I felt all my energy and focus return as well. My legs, no longer burdened under the added weight again found the energy to eagerly sprint up 6 flights of stairs and I've all but stopped using the elevator in my building, not intentionally as any kind of "health chore" but merely out of impatience to wait for the elevator.
Personally, this experience has convinced me that most of what people describe as "aging", at least in middle age, has more to do with people's diet and lifestyle finally catching up with them.
At one point in my late 30s I let myself go for a bit; too many brunches, too many happy hours. I started feeling a bit more sluggish and told friends I was feeling older. I'd put on a bit of weight. I went on a diet for a bit and lost the weight, and suddenly, magically, I felt all my energy and focus return as well. My legs, no longer burdened under the added weight again found the energy to eagerly sprint up 6 flights of stairs and I've all but stopped using the elevator in my building, not intentionally as any kind of "health chore" but merely out of impatience to wait for the elevator.
Personally, this experience has convinced me that most of what people describe as "aging", at least in middle age, has more to do with people's diet and lifestyle finally catching up with them.