Estimation of Shoulder Stiffness State from Images by Analyzing Hemoglobin Concentration in the Peri-Trapezius Muscles

Abstract

This study investigates shoulder stiffness, its mechanism, and objective evaluation methods. Three healthy males lifted a 10 kg block with images taken before and after, and VAS assessments. Results suggest a link between hemoglobin changes and blood flow in assessing shoulder stiffness. Further research with more subjects and individual factors is needed to validate these findings.