Another great dynamic stretch are the mountain climbers or the leg drives, and what you're going to do, is you're going to get down on the floor, you're going to get into a pike position, which is where your hands are, shoulders with apart, your hands are right below your shoulders, O.K. your feet come out, you know, like a push up position, alright your back is flat, your core is tight, your legs are straight. Now, with mountain climbers, there's just one little small variation from the leg drives, so with mountain climbers, what you do, you bring, you alternate legs and you bring your knees to your chest, alright and you would do this for 20 or 30 seconds, which all depends as to what you can handle, but as you bring your knees in, your body stays like this, you don't move your body and you keep your core tight, so you're going to be just like this. while you're breathing out, keep your core tight, keep your hips down and your back flat. A lot of people tend ah, start bringing their but up, which is where they come in ah, or they go like this and they bring their hands in front of them, which is not the proper way of doing it. so, with mountain climbers just like that. Now, with the knee drives, the only variation is, when you bring the knee up, you touch the floor with your foot, so, it's just like this...so they're very similar to each other, except one touches the ground the other one doesn't. So, there you go... it's a great dynamic stretch, mountain climbers or leg drives.