Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Set a flat bench so arms hang freely. Lie face down, chest supported. Hold a dumbbell in each hand with a neutral grip. Engage your core for stability. Pull dumbbells towards your torso, squeezing shoulder blades, keeping elbows close. Pause at peak contraction. Lower slowly with control. Repeat.
Ensure full range of motion. Squeeze shoulder blades at the top. Keep neck neutral. Control tempo. Avoid momentum. Start with lighter weights.
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