HS strains typically occur with the hip flexed in a lengthened position.

HS strains typically occur with the hip flexed in a lengthened position.

• A. False
• B. Not enough data
• C. It depends
• D. True

Answer: (D)

Hamstrings are biarticular, crossing both the hip and the knee. They lengthen when the hip flexes and the knee extends, reaching a notably long position—an arrangement seen in late swing or during rapid acceleration. In this lengthened, eccentric stretch, the muscle is most vulnerable to strain, which is why injuries commonly occur when the hip is flexed and the knee is near extension. If the knee is flexed, the hamstrings shorten across the knee even with hip flexion, reducing the lengthening stimulus. So, describing hamstring strains as typical in a hip-flexed, lengthened position reflects this mechanism.

Hamstrings are biarticular, crossing both the hip and the knee. They lengthen when the hip flexes and the knee extends, reaching a notably long position—an arrangement seen in late swing or during rapid acceleration. In this lengthened, eccentric stretch, the muscle is most vulnerable to strain, which is why injuries commonly occur when the hip is flexed and the knee is near extension. If the knee is flexed, the hamstrings shorten across the knee even with hip flexion, reducing the lengthening stimulus. So, describing hamstring strains as typical in a hip-flexed, lengthened position reflects this mechanism.