Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Stand with feet shoulder-width apart, knees slightly bent. Grip a dumbbell with both hands, interlocking fingers. Raise the dumbbell overhead, extending arms and keeping elbows close to your head. Inhale as you lower the dumbbell behind your head, bending at the elbows. Exhale and extend back to the starting position, contracting your triceps. Repeat.
Engage your core for stability. Keep elbows close to your head. Control the lowering phase. Start with a lighter weight. Avoid locking out elbows.
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