How does that help?
https://www.webmd.com/add-adhd/adult-adhd-and-exercise
I'm not a doctor or an evolutionary biologist. However, in the context of humanity's development down through the ages, sitting indoors at a screen could be construed as unnatural.
The natural endorphin rush of heavy exercise is relaxing.
Some people need a chance to get let their energies out. Why not do it in a productive way?
Most people won't be worse off for trying.
“[The Real Happy Pill] provides further evidence to support the effectiveness of physical exercise, with the aid of additional neuroscientific evidence, as a support mechanism when coping with the stress and anxiety of everyday life. By engaging in regular physical exercise, Hansen states, you may even improve your cognitive functioning across your lifetime.”
I haven’t read it myself yet, but it sure seems like an interesting book.
https://www.studio3.org/post/book-review-the-real-happy-pill
With that said – exercise is one tool in the toolbox. It can’t and shouldn’t be the only tool.
I don't think it's a meme, it's just that people seem to be realising it's beneficial as of late