The Effect of Active Release Technique on Hamstring Extensibility: A Critically Appraised Topic

CLINICAL SCENARIO

Hamstring extensibility plays a significant role in maintaining postural alignment essential for a functional musculoskeletal system. When hamstring extensibility is lacking, individuals are placed at a higher risk for developing various lumbar spine, pelvis, knee, and foot dysfunctions. Limited hamstring extensibility is common, occurring in as much as 40% of college students and 86% of the adult population. Therefore, it is essential to maintain hamstring extensibility, which can be aided by understanding intervention effectiveness for improving flexibility.

PURPOSE

To critically appraise the literature on the effectiveness of Active Release Technique (ART) for the treatment of hamstring extensibility deficits.

CLINICAL QUESTION

What is the effect of ART in a healthy population with or without hamstring extensibility deficits?

SUMMARY OF KEY FINDINGS

Three studies were included for critical appraisal. Two studies concluded a single treatment session of ART that individuals possessing limited straight leg raise range of motion experienced improved active knee extension, popliteal angle, and sit-and-reach test measures. In the third study, a single session of ART was effective at improving hamstring extensibility in males without hamstring extensibility dysfunction.

CLINICAL BOTTOM LINE

Based on the current level 1 and level 3 evidence, ART may be an effective treatment to produce acute increases in hamstring extensibility. Future research is still needed.

STRENGTH OF RECOMMENDATION

Level B evidence exists to support the use of ART to improve hamstring extensibility in the healthy population.