TOP GUIDELINES OF DALLE CAOUTCHOUC

The two over audio strange to me. They can be practically the only real points on which each movie I have observed do concur (as in "do bend your knees, do carry your heels") Hinging with out bending the knees / shifting the hips down ? How ?Due to a foul back again, I steer clear of any motion that topics the lumbar spine to flexion, extension or