Speaking of box squats, you might be interested in this from Charles Poliquin found in one of this weeks articles. Again guys, if I am violatating some copywrite law, I apologize and please delete.
Box Squats for Athletes and Bodybuilders?
Q: What do you think of having athletes do box squats? What about bodybuilders?
A: I never use them. With athletes, you want the most bang for your buck, the highest return, because you only have eleven weeks on average to train them during their off-season. So the choice of exercises becomes really important.
The problem I have with box squats is that their application is limited to powerlifting. The reason being is the goal of powerlifting is to lift the highest amount of weight for the shortest amount of distance within the rules. Essentially in the box squat, your shins don't travel forward. Now I don't know of any sport where the shins don't travel forward for propulsion. So the mechanics of the box squat aren't found in sport.
Do you think all the Westside people are up in arms yet and have me on their hit list? But it's the Bruce Lee principle again: use what is useful and reject what is not. Box squats are the only thing in the Westside system I don't agree with. They only have applications for powerlifting.
Also, any sort of restricted movement pattern tends to change soft tissue integrity. One thing you'll find with people who do a lot of box squats is that they're abnormally tight in the piriformis muscle, for example. In sports where you have to change direction a lot, the box squat will actually decrease your power because you won't be able to use those muscles efficiently.
Finally, most of the athletes I have are highly paid. There's a risk when doing box squats of the athlete bouncing on the box due to lack of concentration. The trauma that can result on the sacral vertebraes could be tremendous. There are just better alternatives. If you're a powerlifter, they're great. If you're any other type of athlete, stay away from the box squat.
Now, as far as bodybuilding is concerned, you can inject box squats sparingly into the training process. They will hypertrophy the thighs and glutes. But bodybuilding isn't an athletic endeavor. Most bodybuilders can't walk and chew gum at the same time. They're not known for coordination!