You can check an opposing player into the boards right? Do it with more power by training with body weight squats!
Here is how:
Stand with your feet about shoulder width apart from each other, holding your stick between your hands at arms length across from your shoulders. Lower your body down until your hips are parallel to the ground, and hold for a "2" count.
Then stand back up with stick still at arms length. That completes one rep. Perform about 3-4 sets of 8-10 reps. Experiment by alternating your stick for a medicine ball held at arms length. Great exercise for learning how to move your own body weight.