External and Internal rotation of shoulder 💪 #Joints #anatomy | Dr. Ishtiaque Arafat

📚 Shoulder External Rotation at 0° vs. 90° A study by Kurokawa et al. (2014) revealed how muscle engagement changes with arm position during shoulder external rotation. 🔹 At 0° abduction: The infraspinatus does most of the work, powering the movement when your arm stays close to your body. 🔹 At 90° abduction: The teres minor takes over, showing peak activation when your arm is raised to the side. 💪 Understanding these differences helps you train smarter, enhance shoulder stability, and boost

2.1K views · 26 reactions | ALL movement falls into one of TWO types...

Unlock the Power of Spinal Rotation! 🌀 Spinal rotation is powered by the internal oblique on one side and the external oblique on the opposite side, which work in perfect harmony and coordination! But that’s not all‼️ Deep rotators between the vertebrae, especially in the thoracic region, also ensure smooth and efficient spinal rotation. At Muscle and Motion, we regularly update our Movement Anatomy section to give you the latest insights for smarter, safer workouts. 📲💪 Click the link in our