Hold-relax with agonist contraction (HR-AC)
a.A variation of the hold-relax technique is a prestretch isometric contraction of the tight muscle and relaxation of the tight muscle followed by a concentric contraction of the muscle opposite the tight muscle. As the agonist muscle opposite the tight muscle shortens, the tight muscle lengthens. This technique combines autogenic inhibition and reciprocal inhibition to lengthen a tight muscle.