Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Keep core engaged and back flat. Exhale, extend arms backward and slightly upward, squeezing shoulder blades. Pause briefly at the top, then inhale and slowly lower dumbbells, resisting gravity.
Squeeze your shoulder blades together as you extend your arms to maximize rear deltoid engagement and ensure proper form. Maintain a slight bend in your elbows throughout the movement to prevent hyperextension and protect your joints. Lead with the back of your hands as you extend, focusing on pulling with your rear deltoids rather than just pushing. Keep your back flat and avoid arching to maintain spinal stability and prevent lower back strain. Control the descent of the dumbbells, resisting gravity to maximize muscle engagement and prevent momentum. Consciously focus on feeling the rear deltoids working during both the upward and downward phases of the exercise to improve mind-muscle connection.
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