I’d argue most folks can apply it. I’m in my late 30s and have two young children.

In order for me to exercise for 35 minutes undisturbed I wake at 4am.

For mental health I’ll prioritize short 10 minute outdoor walks throughout the day. I snooze work notifications, if the world burns down in those 10 minutes so be it.

This time is sacred to me. No time for alcohol, no time for processed foods.

The hardest piece is consistently getting 7hrs of sleep, this is much harder for parents with newborns.

There are folks in their 60s/70s exercising everyday, have abs, and can deadlift more than probably most of the population in their 20s/30s.

I used to prioritize everything else before physical and mental health. Everything clicked into place after fixing this.