This course describes ankle plantar flexor release and lengthening. Unfortunately, these techniques have been referred to by a dizzying array of terms, including ankle mobility exercises, ankle flexibility exercises, ankle mobility techniques, plantar flexor foam rolling, myofascial release, self-myofascial release, calf foam rolling, plantar flexor release with a ball, crural fascia release, plantar flexor stretching, and/or calf stretching. Performing plantar flexor release and lengthening techniques to increase ankle mobility prior to activation, integration, and strengthening techniques may significantly enhance rehabilitation and performance programs. In practice, the release of the gastrocnemius, soleus, and fibularis muscles (peroneal muscles), mobilizing the ankle joint, and integrating a slant board calf stretch (gastrocnemius and soleus stretch), modified calf stretch (gastrocnemius, soleus, and fibularis stretch), and/or a dynamic calf and fibularis stretch, is likely to improve ankle mobility and improve the effectiveness of exercises like isolated tibialis anterior activation , toe raises, heel walks, and other dorsiflexion exercises, in addition to squatting, step-ups, lunges, deadlifts, etc.