When I do box squats I go down below parallel like you would a regular squat. Then I watched these clips on youtube. YouTube - DeFranco's Training - Corey Smith 500 Squat YouTube - DeFrancosTraining.com - HS linebacker box squats 500! YouTube - DeFrancosTraining.com - Another HS kid box squats 500! They all go to just parallel. I am looking to increase my explosiveness for wrestling so how high should the box be? My 2nd question is on this link ( Build Explosive Strength: How to Perform Box Squats | StrongLifts.com ) it says that you have to do box squats explosively and you cant do them slow. In the links above they are slow, I do mine slow when I am increasing weight. Am I not going to gain explosive power by going slow, should I lighten the weight and do them quickly?