Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Grip pull-up bar/rings wider than shoulders. Dead hang, tighten core. Depress scapula to widen shoulders. Raise legs parallel to ground (lift toes up). Hold as long as possible. Repeat; end on time or leg droop.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.