I’m not sure about all of this. I’ve been sedentary for 34 years, and I somehow still am. But I discovered rollerblading at 34 and now I’m part of a rollerblading course in a skatepark at a fixed time in the week, just after my biggest day of work. And going to the skatepark is boring, I need to take a bus to nowhere land and then walk in nowhere land for 10 minutes. I’ve always been happy to go to it. And even the d…
The "secret" to long-term fitness is finding activities you enjoy doing for their own sake that happen to involve moving your body and then incorporating them into your lifestyle such that you're doing them frequently and consistently.