Slide and Turn Introduction Muscles usually work in groups. When we have poor control of a muscle group, we tend to substitute muscles over which we have better control. The result is a kind of functional confusion. We need to sort out which muscles work best, with which movements. The muscles that turn the thighs sometimes interfere with correct so-as function, and that kind of confusion. The following movements sort that confusion out. The expected outcome of these movements is a freeing of the muscles of the inner thighs and of the buttocks, for greater mobility of the legs in turning movements. The essence of these next movements, to remember while doing them, is to maintain the same amount of turn of the thigh throughout the full length of each movement.