Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Stand with feet shoulder-width apart, holding a dumbbell. Slightly bend knees and hinge at hips, keeping back straight and core engaged. Let arm hang straight. Retract scapula, pulling shoulder blade towards spine while keeping arm straight. Pause, then slowly return to start. Repeat on both sides.
Maintain a neutral spine. Focus on scapular movement, not elbow bend. Engage your core for stability. Control the movement with a lighter weight to ensure proper form.
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