Effects of Neurodynamic Sliding Versus Eccentric Training on Lower Extremity Function, Strength and Proprioception in Athletes with Short Hamstring Syndrome.

Effects of Neurodynamic Sliding Versus Eccentric Training on Lower Extremity Function, Strength and Proprioception in Athletes with Short Hamstring Syndrome

Hamstring strains are among the most common injuries in field sports, accounting for 10% of all team sports injuries and often leading to long-term absence from activities. Risk factors include older age, previous injuries, reduced flexibility, and strength deficits. The hamstrings play a critical role in dynamic stability and joint preservation, particularly for the hip and knee. While stretching is crucial for injury prevention, there is debate over optimal techniques.

The neurodynamic sliding technique (NST) and eccentric training (ET) are two methods that can improve flexibility and reduce injury risk. This study uniquely combines ET with NST to address hamstring tightness in athletes, aiming to evaluate their effects individually and in combination on knee muscle strength, range of motion, proprioception, and lower limb function compared to a control group.

The hypotheses examine whether these interventions differ in their impact on eccentric and concentric knee strength, the knee flexor/extensor strength ratio, range of motion, proprioception, and dynamic balance (measured via the Y Balance Test). The null hypothesis (H0) proposes no differences, while the alternative hypothesis (H1) suggests significant differences among the intervention methods.

Inclusion Criteria:

1. Age between 18-30 years old
2. Have a normal body mass index (BMI)
3. Have hamstring tightness as indicated by the results of an SLR examination of less than 75o (39).
4. Have hamstring tightness as indicated Active Knee Extension Test (AKET) was used to evaluate hamstring shortness. Individuals with AKET angles less than 150 degrees were considered as samples (146).
5. Ability to perform exercises.
6. Don't having plates (implants) in the lower limbs.
7. Not having a history of fracture in the lower limb (with or without realignment process).
8. Not having history of surgery to repair joint capsules, ligaments, muscles, and nerves,
9. A history of or experiencing Hernia Nucleus Pulposus (HNP).

Exclusion Criteria:

1. Receiving physical therapy or other conventional therapy in the past 6 months.
2. Absence in one of the pre- or post-test sessions.
3. Absence of more than two sessions in practice sessions.