That's why I skate. Skating is one of the lowest impact types of lower body exercise too. For folks with bad knees it can be a real find. Nice smooth steady strokes as opposed to the constant pounding of running treadmills or jogging too.
Now granted getting wiped out behind the net by some 6' tall power foward as you charge to the net to make the call, can be sort of considered "high impact" too. Just watch out along the boards as those big defensemen try to rip it down the ice on a penalty kill. Seriously watch the officials one night (cup finals are on right now as a matter of fact) as the defense trys to ice the puck on a PK, and watch as they all "duck" to try and get out of the way... That's sort of high impact too I guess, but I love it.
I think I hear my kid wimpering so let me run....
