Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
From an inverted hang, shoot the legs over and away as the body turns over between the hands, rotating the rings outward and spreading the arms as the shoulders pass through. Finish in a hang facing forward.
Practise it slowly without a swing first. Bend the arms slightly — locked arms are what make it feel harsh on the shoulders. Turn the rings out as you pass through.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.