Something good to know: the tldr is usually on the article itself, in the Conclusion part of the article (sometimes this is on the abstract as well)

A bit on the ironic side, the Conclusion section of this article is very hard to find (it's on page 36 of 86, depending on your zoom level) and this reading mode on the website doesn't work so well

But here it is

> In line with previous research, we find that exercise benefits executive functions and attentional control in children with ADHD. The beneficial effects are comparable to those reported in PBC with substantial and consistent improvement on test of several cognitive functions following particularly long-term exercise. An important notion is also that no study has reported negative or adverse effects of exercise.