Dynamic Angle-Based Neuromuscular Activation (D.A.N.A.) Protocol: A Novel Multi-Angle Rehabilitation Approach for Grade III Chondromalacia Patella – A Case Report

Abstract Background: Chondromalacia patella is a common source of anterior knee pain in athletes, often leading to impaired quadriceps control and delayed return to sport. Conventional rehabilitation typically focuses on single-angle or generalized strengthening, which may not adequately activate muscles throughout the joint’s functional range. Purpose: This case report introduces the Dynamic Angle-Based Neuromuscular Activation (D.A.N.A.) Protocol, a novel, multi-angle rehabilitation framework designed to restore strength, neuromuscular control, and sport readiness in athletes with chondromalacia patella. Case Description: A 21-year-old state-level football player presented with MRI-confirmed Grade III chondromalacia patella and right knee pain (NPRS 6/10). The D.A.N.A. Protocol was applied over 14 weeks, integrating multi-angle isometric and isotonic exercises at 0°, 30°, 45°, 60°, and 90° of knee flexion, combined with a phase-specific taping progression (McConnell → kinesio → dynamic) and functional training. Results: Post-intervention, thigh girth increased (47→49 cm), knee flexion improved (127°→131°), and pain reduced (6→1/10). Strength gains were observed in knee extensors (27.5→38.1 kg) and flexors (31→37 kg), with enhanced balance and endurance (Y-Balance anterior 70→75 cm; single-leg wall sit 32.2→45.3 s). The athlete returned to full football training pain-free and without recurrence. Conclusion: The D.A.N.A. Protocol effectively improved strength, stability, and function, enabling complete recovery and return to competitive sport. This case supports the D.A.N.A. Protocol as a reproducible, athlete-centered approach for managing chondromalacia patella and similar patellofemoral conditions.