Muscle outlines from Body Muscles by Ivan Vulović, Apache 2.0 — regrouped and recoloured for Muscle Train.
Stand or sit tall, shoulders relaxed. Extend one arm across your body to shoulder height. Gently pull the extended arm towards your chest with your opposite hand. Hold for 15-30 seconds, feeling a stretch in your shoulder. Release and repeat on the other side.
Keep shoulders relaxed. Avoid forcing the stretch; it should be comfortable. Breathe deeply. Best performed post-workout to aid recovery. Maintain a straight back.
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