for some parts of it, yes. I keep my body and emotional health in check and even do well for the most part, but I don't worry about my mental health all that much - I optimize for output with only modest regard for my mental health right now.
Backpacking and camping is quite time consuming, but hopefully you have 30 mins per day to spend being active! Makes a huge difference from anecdotal experience. My mental performance suffers if I'm not taking care of my physical. Even a 30 min walk is helpful.
I've not had that be the case for me unfortunately. Interestingly the highest output times I've had were during periods of very low testosterone production. I still maintain an athletic weight and stay active with various social activities that get me exercise, but somehow when I workout religiously with a strict diet, I don't seem to do well at focusing on work.
Strict diets suck. I think there needs to be some joy in eating. I tend to just follow something like an 80/20 rule. I eat whatever I want, but relatively healthy most of the time.
What do you mean - you don't have 30 mins per day to go walk / jog? Does it not worry you that you may never able to actually retire and have bad physical health on top?
30 minutes isn't much contiguous time and would probably be a net-negative in my goals, even when considering health benefits. It does worry me that I may retire in bad health but I'm saving as fast as I can to avoid that. I'm also speed-running to ensure I will have the time I need to help my parents as they get older. In any case, I am confident I will be able to retire (I nearly have the funds).
To be clear, I'm definitely burnt out. At this point I don't see any way out besides ER. There just aren't jobs out there that use my skills without demanding 30-70 hour weeks.
I'm just saying you can start with a small amount of time, not sure why you think you need more. It will compound and the benefits surely wont be a net negative, especially if mentally burned out. It's much easier to start now than when you're older. To each their own though.