Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Kneel with right knee down, left foot forward at 90 degrees. Hold a dumbbell in your right hand, palm forward, at shoulder height. Engage your core, maintain an upright torso. Press the dumbbell overhead, extending your arm fully, wrist straight. Slowly lower the dumbbell back to shoulder height. Repeat for desired reps, then switch sides.
Maintain a tight core, stable base with a firmly planted front foot, and neutral spine. Avoid shoulder shrugging. Control the movement throughout.
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