Several wrestlers have asked about what other sports and what other martial arts sports are good training for wrestling.

Locally some places are offering MMA (mostly grappling) style training for kids as young as 14.

I have had a mixed bag of martial art training from the military much of which is not applicable to wrestling because it involves causing injury.

My thoughts are that most grappling training involves submissions that can't be used in wrestling or teaches many techniques that involve grappling/defending from your own back. (Not a good idea in wrestling in most cases)

My thoughts are Judo gives the most directly transferable techniques to wrestling of the martial arts but I am not a expert.

Any thoughts or opinions about what martial arts have the most skills that directly transfer to wrestling and that are things a high school aged kid could do?