Stand over the barbell. Position your feet underneath the bar at
shoulder width, having the bar cross just in front of your ankles.
Point your toes slightly out. Holding your head erect, tighten your
spinal muscles. Rotate your shoulders forward. Now bend over while
squatting down and grip the bar at shoulder width. Keeping your head
erect, take a 3/4 breath. Stand up, pushing off the floor with
your legs and pulling with your back until the bar reaches a point
just above your knees. Hold momentarily and then start to let out
your breath as you quickly descend, lower and release the barbell.
Quadriceps/Gluteus/Sacrospinalis