Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Rings at chest height. Face rings, shoulder-width stance, neutral grip. Step back angled, core engaged, straight head-heels. Pull rings to face (elbows out/back), squeeze scapulae at top. Extend arms slow to start. Repeat.
Straight body line, core engaged. Squeeze scapulae; elbows > wrists (rear delts). Control pull/release phases. No shrug—shoulders down. Adjust angle: Upright easier, horizontal harder. Avoid: Momentum, low elbows, poor scap retraction, over-pull, wrist bend, too close, weak core, internal rotation, neck jut.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.