Possible (not 100%) the noise is from higher than "one-floor-up". In past "below neighbor" opened window scolded "children stomping upstairs" & we were in-between.
Try $1-2 soft foam earplugs (unity/watson/guardn) or buy online 80cents a pair, can reduce some noise.
If it is kids running, to me is a short while.
Once tired, they stop n when grow up, no more running.
But if you got some one 10 years, still creating noise, only way is you hv to create noise too.
If you can beat them, join in the fun.