Simple muscle test could change how we track rare muscle diseases

This study looked at a simple, low-cost test called the Myositis Functional Index-3 (FI-3) to see if it accurately measures muscle function in people with inflammatory myopathies (diseases that cause muscle weakness). Researchers compared it to advanced machines and also tested a repetitive task training program. Only 2 people took part, so results are very limited, but the goal is to find easier ways to track muscle health and improve exercise safety.