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Revealed: The studs that could reduce football’s ACL problem
(www.telegraph.co.uk)
This community is being retired in favor of !football@soccer.forum.
I'm pretty sure round studs (a la Copa Mundials) are less likely to result in ACL injuries than the more common blade studs. No research to back that up, but seems like its much easier for a round stud to release from the ground than the flatter, longer blade.
Copas are the best on turf imo. More tractions than hard ground nubs, but the studs aren't too long either.