so I'm gonna demonstrate how to do a mountain climber on a medicine ball this is a progression from a regular mountain climber on the floor either on your hands or in your forearms because of the fact that you are on an unstable surface it makes it that more challenging it's going to engage much more core though so it's a great exercise so the first thing you want to do is get your hands on the med ball just like so I would lift yourself up in a plank position make sure you feel stable because you're going to start moving your legs if this is hard enough here and this is challenging then stay here and hold this so the mountain climber just going to bring one knee in and alternate with your left right and left right and left all the while you're staying engaging your abs and your pelvis is tucked under okay if you want this to get more challenging if you want more just alternate a little faster just like so so it's great because not only is it working your core it's getting your heart rate up and it's also working your your balance as well because you're on that unstable surface and that's how you do a mountain climber on a medicine ball