Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Stand with feet shoulder-width apart, holding a dumbbell in each hand (palms facing each other). Keep elbows close to your torso and shoulders relaxed. Curl one dumbbell towards the opposite shoulder, keeping the upper arm still. Squeeze biceps at the top, pause, then slowly lower. Alternate arms.
Maintain a controlled motion, avoiding momentum. Engage your core for balance. Exhale during the curl, inhale during the lower. Start with lighter weights to ensure proper form.
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