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 barbell with an underhand grip, arms straight and close to your body. Curl the barbell upwards as high as possible, flexing your wrists while keeping arms stationary. Pause briefly at the top, then slowly lower with control.
Use a moderate weight. Isolate wrist movement; keep arms and shoulders stable. Maintain a slight bend in knees. Exhale on the curl, inhale on the lower. Avoid momentum; control the movement. Achieve full wrist extension and flexion.
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