Spine Corrector Leg Series Tutorial Apparatus: Spine Corrector Level: Intermediate Video Type: Tutorial Language: English Tutorial on the Spine Corrector. Intermediate Leg Series including Shoulder Bridge. A very corrective series for the body, it lengthens and strengthens the hips and torso. Level: Intermediate Language: English This page is only available to members. Click here to try Authentic Pilates online for FREE for 14 days or log in if you are already a member.