Yep. Found it too (independently, haven’t updated the comments). Another link (same paper) https://www.researchgate.net/publication/274087768_Measureme...
> The results of this study also show that the GC group has a performance that is 42% better than the GC-EF group. These data seem indicate that after an intense physical exercise, people without ADHD show impairment in attention performance. However, this hypothesis requires further studies, which include the assessment of the duration of this effect.