C.J.
You are so right. Boys are physical and to different degrees. Since my kids are typically the "rougher" ones in the groups I always have structured physical activities not just - "go play outside." I have little golf sets, yard bowling, racing, frisbee and sacks (for sack racing) etc. If inside play is all we have, I pull out hula hoops and set up an obstacle course or even play simon says.
after they are good and worn out (about 30 min), they tend to settle down - a little - into playing playmobils, zoo or some other lower key game.
I also have to ban wrestling with some friends because I can tell they just don't like to do it.
Maybe you and the other mom can set some rules and also set up some big activities that give the kiddos some structured outlet to their boy agression:)
Best,