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Thats what everybody thinks but your joints get tougher and more resistant, at least on my experience
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Wait 10 years. You'll see what I'm saying.
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But I love it man, alot of the pro tracuers are in there late 20's or early 30's heck david belle the creator of parkour still does it
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Looks really cool though
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Totally agree. I used to do it when I was in my teens, and early 20s. Was fun and got lots of attention.