Exercise Advice: Place a barbell behind your neck and securely
rest it on your shoulders. Your feet should be as far apart as possible
while still allowing you to comfortably execute a full squat. Begin
this exercise by squatting as though you are going to sit down in
a chair. Squat to a point to where your thighs become parallel to
the floor and then return to the start position. It is very important
that you keep your back as straight as possible throughout this
movement (one way to help do this is to focus your eyes on a spot
high on the wall in front of you throughout the entire exercise).