Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Engage your core for stability. Keeping a slight bend in your elbow, lift the dumbbell out to the side, leading with your elbow. Raise your arm until parallel to the floor, squeezing your rear deltoid at the top. Slowly lower under control, then switch sides.
To initiate the movement, lead with your elbow, focusing on feeling the muscle engagement rather than simply lifting your arm. Actively squeeze your rear deltoids at the top of the movement to maximize muscle activation and ensure proper form. Maintain a stable body throughout the exercise, avoiding any rocking or shifting to prevent momentum and focus on the targeted muscles. Keep your spine in a neutral position, preventing arching or rounding of the back, to protect your lower back and maintain proper posture. Control the descent of the dumbbell, resisting the urge to let gravity take over, to build strength and prevent injury.
MuscleTrain is actively being built. If something looks broken, or you have a suggestion, let us know — it really helps shape the app.