Glenohumeral Gurus 43: Rethinking Frozen Shoulder (Part 3) Muscle Guarding or Capsular Stiffness?

If frozen shoulder is primarily a capsular disorder, how do some patients suddenly regain large amounts of range of motion within days or weeks? In Part 3 of our frozen shoulder series, I sit down with Dr Pablo Policastro, physiotherapist, researcher and educator from Buenos Aires, Argentina. Pablo recently completed his PhD exploring the role of the rotator cuff in frozen shoulder and shares some fascinating insights into muscle guarding, shoulder stiffness and the complex interaction between biology, pain and behaviour. We discuss why frozen shoulder may be much more than a capsular problem, how changes in range of motion challenge traditional assumptions about stiffness, and what current research can (and can't) tell us about the role of the rotator cuff. Pablo also explains his work investigating muscle architecture using ultrasound and why understanding muscle guarding may be an important piece of the frozen shoulder puzzle. Key topics discussed: ✅ What sparked Pablo's interest in the rotator cuff's role in frozen shoulder ✅ The concept of muscle guarding and why it matters clinically ✅ Why some patients gain range of motion much faster than expected ✅ Rotator cuff architecture, pennation angle and muscle thickness research ✅ The challenges of studying subscapularis in frozen shoulder ✅ The influence of fear, expectations and psychosocial factors on movement restriction ✅ Why frozen shoulder should be viewed as more than just a shoulder problem ✅ Clinical tips for reassessment, diagnosis and patient management One of the most thought-provoking discussions centres around a simple question: If the capsule is truly stiff and contracted, why do some patients show dramatic improvements in movement over a very short period of time? Whether you treat frozen shoulder regularly or only occasionally, this episode will challenge some assumptions and provide a fresh perspective on one of the most frustrating shoulder conditions we see in practice. 🎧 Enjoy Part 3 of our 5-part frozen shoulder series. Follow Pablo Policastro Instagram: https://www.instagram.com/policastrit... LinkedIn: https://www.linkedin.com/in/policastr... ResearchGate: https://www.researchgate.net/lab/Pabl... Follow Dr Margie Olds LinkedIn ⁠I ⁠ www.linkedin.com/in/margie-olds-51586920/ Facebook⁠⁠ I ⁠⁠   / shouldereducation   Instagram⁠⁠ I ⁠ www.instagram.com/margieolds/ YouTube⁠⁠ I ⁠   • Glenohumeral Gurus Podcast   Website⁠ ⁠I ⁠ ⁠⁠⁠⁠https://margieolds.com/⁠⁠