Any sport with contact, or sudden direction change will wreck your knees. I've got two acl reconstructions (plus a damaged shoulder) to show for two years of division 2 college football. At 38, I'm much more inclined to workout like Flyingmonkey. A fair amount of strength training, mostly with my own body weight, and lots of variety. And I'm 210 lbs with single digit bodyfat.
^^ If you are in NYC I am curious why you'd buy from the online store? I've always seen more selection in the brick and mortar shop than I have online (plus I seek immediate gratification for purchases whenever possible).