A comparison of two stretching programs for hamstring muscles: A randomized controlled assessor-blinded study.

Area of Science:

• Sports Medicine
• Rehabilitation Science
• Biomechanics

Background:

• Hamstring flexibility is crucial for athletic performance and injury prevention.
• Optimal hamstring stretching techniques, specifically the joint focus (hip vs. knee), require further investigation.

Purpose of the Study:

• To investigate the influence of focusing hamstring stretching on the hip versus the knee.
• To compare the effectiveness of two different home-based hamstring stretching programs.

Main Methods:

• Randomized controlled assessor-blinded study with 111 participants.
• Three groups: control, hip-focused stretching (SH), and knee-focused stretching (SK).
• 8-week home-based program with standardized stretching protocols and outcome measurements (hip flexion and knee extension ROM).

Main Results:

• Both stretching groups showed significant increases in hip flexion and knee extension range of motion (ROM) compared to the control group.
• No significant differences in ROM improvements were found between the hip-focused (SH) and knee-focused (SK) stretching groups.
• The SH group showed a slightly higher, though not statistically significant, increase in ROM compared to the SK group.

Conclusions:

• The specific joint (hip or knee) focused on during hamstring stretching does not appear to influence flexibility gains.
• Both tested hamstring stretching protocols are effective in improving hip and knee range of motion.
• These findings suggest that flexibility training can be adapted based on individual preference or accessibility without compromising outcomes.