Ep. 59 – Quads, Abs and Back Extensors Relationship Part 2 September 4, 2018 Posted in Primary Course Concepts You have reached PRIVY. This content is only available to members. « Ep. 58 – Quads, Abs and Back Extensors Relationship Part 1Ep. 60 – Reverse Squatting Application for Plantar Fasciitis »