I want you to go down as fast as you can go down in the squat... as fast as your technique can tolerate... as fast as you can maintain tightness [and] be consistent hitting your positions... We may want to be a little bit slower and more controlled in the top three quarters of the squat and then (if you're able to maintain tension doing this) to accelerate into the bottom of the squat and allow yourself to get some some rebound.. exploit the stretch reflex.