Every generation has its madness
Why is everyone so fit these days? OK, I'll rephrase. Why are so many people so fit these days?
I now routinely meet people my age who are basically as fit looking as professional athletes. Except that they aren't professional athletes. So they only use the fitness to go to the gym and get more fit. Indeed, many have to keep going to the gym just to stay fit.
So they do a load of work to get themselves into a particular state, and then they panic that they need to stay in that state and so they have this tyranny of having to keep going to the gym. In case they get less fit.