Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Lie on a bench, feet flat. Hold a dumbbell with a neutral grip, arm extended. Slowly lower the dumbbell to the side in an arc, feeling a chest stretch. Pause briefly, keeping your arm below shoulder level. Engage your chest to return to the start. Repeat on both sides.
Maintain a slight elbow bend. Focus on chest muscle control, not momentum. Engage your core. Perform slowly and with control. Retract and press shoulder blades against the bench.
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