I love mountain climbers because they get my heart pumping! Here’s how we do them:
Start in a straight-armed plank position (like the planks we do in yoga class), gaining core stability! Be sure your hands are directly under your chest, and a bit wider than your shoulder distance apart. Keep your legs stretched out in a straight line – from ankle up to the top of your head. Now bend your right knee and bring it up in the direction of your right hand or elbow. At this point, you should be in a similar position to the one you would be in if you were climbing a mountain or tree except horizontal instead of vertical. After bringing your right knee up, return it to the original position and do the previous step with your left leg.
As you get better at this and gain stability, you make want to create more of a running motion with these, as though your are running up the mountain!