Do you live in area that has been hit by all the blizzards? The skating style of cross country skiing is great for building inner quad strength as you are pushing off from a wide based gait. Skating theoretically would do the same, but you have to skate really fast to really work those quads. But you can even mimic this motion with a wide based jump/run motion pushing off from the inside aspect of you feet. Sideways skipping along the baseline can also work the inner thigh muscles.
I remember Ano posting some studies this summer how leg press machines are worse for your hips than squats, but I'm not sure non-weightlifters just starting out might benefit from a little leg press work to get at some added quad strength.
Cycling is great cross training overall for your quads.
Last edited by charliefedererer; 03-01-2010 at 05:23 AM.