In the old days didn't you need to be a certain hight? Like you say there should be a 'strength' test, but in the PC (no pun) world it would probably be seen as some form or strenthist.
SOURCE:
https://uk.screen.yahoo.com/crime-caught-on-camera/teen-tackles-fleeing-police-suspect-160003494.html?vp=1
'A 16-year-old has been given a top police award after tackling a man who'd just assaulted two female police officers. Kiya Ingham, from Brighton, now plans to become a police...