Men have been learning and jumping quads regularly since the 1980s, but I don't know how well the processes and aftermaths have been documented. Boys do not tend to show ready quads regularly at junior competitions like the current girls do (Stephen Gogolev being one of the exceptions), but I would imagine they have started to train them well before they start to do them at 15 years old or later.
Puberty and growth spurts can be disastrous for guys - a small pre-puberty boy turns into 6 ft tall young man and it is much harder to get those quads back to where they might have been before (Nam Nguyen comes to mind). That 13-year-old girls jump quads and 3As could also be the result of the way women seemingly are better at controlling their bodies and movement at an earlier age. Boys get the same kind of control and polish usually much later.
The effects of jumping all those quads for a long time would require follow-up studies post competetive career, but am not quite sure if these get done very much. Also, if there are physical problems, it is probably difficult to find out if the jumps are to blame or if the cause is something else specifically. The problems could also be just results of being a top-level athlete.
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