Now that you have mastered the BW Squat, it is time to add an external load using a medball. The MB Squat is a safe loading progression given the multitude of MB weight ranges available. As with any new external load or movement, focus on keeping the movement controlled and not rushing through it as you adjust to the new stimulus. Make sure you and your athletes master the previous day before proceeding!
Be sure to check out the rest of the progression if you have more questions on how to master the squat.