Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Feet shoulder-width on band middle. Ends in hands, arms sides palms in. Slight elbow bend, raise arms lateral to parallel. Pause top (no shrug). Lower slow to start. Repeat.
Slight elbow bend always (less joint strain). Shoulder-powered (no body swing). Core tight for balance/posture. Controlled up/down for max engagement. Light band for beginners/form. Arms to parallel (safe height). Neutral wrists.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.