Hyaluronic Acid and Amino Acid Combination Versus Exercise for Chronic Lateral Epicondylitis

This retrospective, controlled clinical study aims to evaluate the effectiveness of a targeted biological support injection containing a hyaluronic acid and amino acid combination in patients with chronic lateral epicondylitis (tennis elbow). Medical records will be reviewed to compare outcomes between patients treated in routine clinical practice with a 3-dose injection regimen (weeks 0, 2, and 4) plus a home exercise program and those treated with a home exercise program alone. Key outcome measures include pain intensity (VAS), functional status (PRTEE), grip strength, and pressure pain threshold.