This video is of Frostburg freshman Adam Baxley banging out a box drill. We use this to develop both foot speed and conditioning. Having him block increases game carryover as well, and will give him the stamina to perform pop-ups from his knees into the late innings. Hip flexor, leg and core strength are all stressed in this drill.
This is a great drill, he does a good job with it as well. We do these as well but with the catchers starting standing and doing high knees or quick jab steps and add in a 180* spin and back, a little more challenging but less intense than the box drill.