Effects of Eccentric Resistance Training on Lower-Limb Passive Joint Range of Motion

Background: Passive joint range of motion is an important component of musculoskeletal function and is closely related to flexibility, movement efficiency, posture, and injury risk. Limited lower‑limb range of motion may negatively affect functional performance and athletic movement patterns. Eccentric resistance training, which involves active muscle lengthening under load, has been proposed as an effective strategy not only for increasing muscle strength and tendon capacity but also for improving flexibility and joint mobility. However, the effects of eccentric resistance training on lower‑limb passive joint range of motion require further clarification. Methods: This study was conducted as a narrative review of experimental and intervention studies examining the effects of eccentric resistance training on lower‑limb passive joint range of motion. Relevant studies published between ۲۰۰۵ and ۲۰۲۵ were identified through searches of PubMed, Scopus, and Web of Science databases. Eligible studies included healthy adults, athletes, or clinical populations who participated in structured eccentric resistance training programs targeting lower‑limb muscle groups. Primary outcomes included passive range of motion at the hip, knee, and ankle joints, including measures such as hamstring flexibility, hip flexion, knee extension, ankle dorsiflexion, and overall lower‑limb mobility. Results: Evidence from the reviewed studies suggests that eccentric resistance training can improve lower‑limb passive joint range of motion. Improvements are commonly observed in hamstring flexibility, hip flexion, knee extension, and ankle dorsiflexion following eccentric‑focused interventions. These adaptations may be related to increased fascicle length, changes in muscle–tendon stiffness, improved stretch tolerance, and remodeling of connective tissue. Compared with traditional static stretching, eccentric resistance training may provide the additional benefit of simultaneously increasing strength and flexibility. However, the magnitude of change appears to depend on training intensity, range of movement, duration, frequency, and the specific muscle groups trained. Conclusion: Eccentric resistance training appears to be an effective approach for improving lower‑limb passive joint range of motion while also promoting strength adaptations. It may therefore represent a practical alternative or complement to traditional flexibility training in athletic, rehabilitation, and health‑promotion settings. Future research should determine optimal eccentric training protocols and compare their long‑term effects with conventional stretching interventions.

کلیدواژه ها:

Eccentric Resistance Training ، Passive Range of Motion ، Flexibility ، Lower Limb ، Joint Mobility