Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Grip the wall bars with one hand high and the other low, then brace your core and pull your shoulders down. Use a controlled kick to lift into a straddle human flag, keeping your arms locked, torso horizontal, and legs extended. Hold the position with full-body tension, then lower yourself slowly under control.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.