Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Set the rings to about waist height and grip them with palms facing up. Lean back with your body straight and arms extended. Curl your hands toward your shoulders, keeping elbows stable. Lower yourself back with control to the starting position.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.