Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Kneel facing rings, neutral grip (palms in). Walk feet back to straight body line. Rings hang vertical (no angle).
No sagging hips (engage glutes/core). No rib flare (reset to protect back). Eyes 12″ ahead (no neck overextension). Breathe 5s in/5s out for tension. Fix ring swing: Lower height.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.