Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Press to a straight-arm support on the rings, then rotate the rings outward until the palms face forward and the arms are turned out. Hold with the elbows locked, the shoulders down and the body still.
Turn the rings out as far as you can hold without the elbows bending. Squeeze the rings into the hips. Stop the set as soon as the rings start to wobble.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.