Episode 357: "SNAGs To Mobilize The Upper Cervical At Home" Following manual therapy, a physical therapist should teach you how to perform a Sustained Natural Apophyseal Glide, or SNAG, for short. This SNAG cervicogenic headache exercise is a way to provide yourself your own form of manual therapy. Essentially this exercise mimics the manual therapist’s hands and provides a joint mobilization to the dysfunctional joint (i.e. C1-2) . To perform: - Use the EDGE of a towel. Using the edge, and not