Today i was doing squats in the 3-5 rep range. After my squats i had dips. So i'm on the dip station which is somewhat elevated. Instead of putting my feet down on the side steps and then going down i decide to hop down by swinging my legs up and letting go.
Soon after landing, i feel this incredible soreness in the middle and side of my quads . It lasted 10 seconds. I guess by de-accerelating quickly (or else i'd be flat on the ground) after hitting the ground, the muscle contract very strongly.
Anyway i have never heard of this before and i think jumping down from a box with a weight vest on after some ball busting squats would probably give some interesting results.
I think this would be equivalent to training your obliques by moving on a object (squats) or by trying try to resist rotation (dropping down from box).
Anyone ever done or heard of this?