Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Grip the bar with one hand, engage your shoulder, core, and legs to create full-body tension. Initiate the pull by driving your shoulder down and back, then pull until your chin reaches the bar while keeping your body close and minimizing rotation. Lower slowly under control, reset your shoulder at the bottom, and repeat with strict form.
Pull your shoulder down before you bend your elbow. Keep your whole body tight and your legs together: it is easier to stop your body from turning. Keep your chest close to the bar all the way up. If your chin doesn't reach the bar, go back to the assisted version. The elbow and shoulder take a heavy load here: add reps gradually and stop if you feel sharp pain.
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