In this study, muscle lengthening procedures were evaluated in the ankle plantar flexors. Four soleus muscle stretching procedures—static stretch (SS), hold relax (HR) (isometric plantar flexor contraction before stretch), agonist contract (AC)
(dorsiflexor contraction assisting stretch), and hold relax-agonist contraction (HRAC)— were performed in the sagittal plane by 12 physically active adults