I just got done exercising by choice for the first time since 2016.
I'm entering my late 30s, and my body isn't taking care of me because I have not taken care of it for most of its adult life.
I went rollerskating on a local trail/walking path. Skating is much more fun than running; I absolutely hate running when it's not to save my own life. It was not very smooth, so it was particularly difficult. It was pretty though, and I feel great now. I went 3 miles in all. I had fun, 8/10, would do again, but on a smoother path next time.
Lately (past 3ish years) I have been struggling with finding the motivation to do the simplest of tasks, but my partner went to work and I was bored. I figured, "why the hell not?" baby steps.
Late 30s you really have to work for every little bit of exercise it seems. I love running and the high it gives me but just getting up and out the house takes the most effort
Hope you find it in yourself to keep up. I'm of the opinion everyone should start working out, even if lightly before 40 and keep at it. I myself am trying to walk the talk over here, so wish me luck as well.