It's not clear to me what the author is suggesting. Yes, I agree we focus a bit too much on self improvement and perhaps should relax about certain things. But

It's not clear to me what the author is suggesting. Yes, I agree we focus a bit too much on self improvement and perhaps should relax about certain things. But if I start to believe that, for medical reasons, or any other reason, I really should go to the gym, and I struggle doing it because I feel it's not my environment, how do I start without a bit of self-discipline? I could choose another sport, one that is actually fun and I look forward to -- I've done that, but even in that case, sometimes I feel lazy. What is it that I should do?