Today we cam across san article on Canadian runningthat linked to an interesting study from 2019 on the best way to recover from a hard workout. The study of female DII soccer players showed it was way better to put your hands on your knees than it was to put them over your head after a hard rep.
Those that put their hands on their knees saw their HR drop by 53 bpm whereas those that had it over their heads saw it only drop 31 bpm.
https://runningmagazine.ca/sections/training/recover-with-hands-on-knees-not-over-head/