hey!!
the best kind of shoes I've found for jumping are volleyball...they only last about one season, but they support your feet really good!!
I have a pair of Nike's right now that are excellent... and as far as jumping on concrete I've always been told it's really bad but I would jsut suggest putting a excersize mat down or buying some tylon (what they use at USAJRF Nationals) I hope this helps...
Kyna :-D
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