Effective self-stretching of carpal ligament for the treatment of carpal tunnel syndrome: A double-blinded randomized controlled study

Carpal tunnel syndrome (CTS) is the most common nerve entrapment syndrome worldwide. There are limited studies on the effectiveness of carpal ligament stretching on symptomatic and electrophysiologic outcomes. The purpose of this study was to evaluate the effect of self-myofascial stretching of the carpal ligament on symptom outcomes and nerve conduction findings in persons with CTS. This is a prospective, double-blinded, randomized, placebo-controlled trial. Eighty-three participants diagnosed with median mononeuropathy across the wrist by nerve conduction study were randomized 1:1 to sham treatment or self-carpal ligament stretching. Participants were instructed to perform the self-treatment four times a day for six weeks. Seventeen participants in the sham treatment group and 19 participants in the carpal ligament stretching group completed the study. Pre- and post-treatment outcome measures included subjective complaints, strength, nerve conduction findings, and functional scores. Groups were balanced on age, sex, hand dominance, symptom duration, length of treatment, presence of nocturnal symptoms, and compliance with treatment. Even though the ANOVA analyses were inconclusive about group differences, explorative post hoc analyses revealed significant improvements in numbness (P = .011, Cohen's d = .53), tingling (P = .007, Cohen's d = .60), pinch strength (P = .007, Cohen's d = −.58), and symptom severity scale (P = .007, Cohen's d = .69) for the treatment group only. The myofascial stretching of the carpal ligament showed statistically significant symptom improvement in persons with CTS. Larger comparative studies that include other modalities such as splinting should be performed to confirm the effectiveness of this treatment option. •Self-Stretching of Carpal Ligament for Carpal Tunnel Syndrome.•Self-Stretching shows improvement symptom severity and pinch strength.•Providing self-care technique may help alleviate the need for skilled therapy.