Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Start by lying on your side, propped up on your forearm with your head aligned. With a dumbbell held close to your side at a 90-degree angle, rotate your shoulder outward to raise the weight. Lower the weight with control back to the initial position, then repeat on the opposite side.
Keep a consistent 90-degree bend in your elbow and stabilize it against your ribs. Decrease the dumbbell weight if you notice it drifting away from your side. This movement helps address muscle imbalances. Prioritize slow, deliberate motions throughout the entire range. Actively contract your shoulder external rotator muscles for optimal results.
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