Biceps femoris long headBiomechanics

The longer, hip-crossing head of the hamstring muscle biceps femoris.

Biceps femoris long head (BFlh) is one of two heads of the biceps femoris muscle, originating from the ischial tuberosity and crossing both the hip and knee joints, making it biomechanically distinct from the short head, which crosses only the knee. It is the most commonly injured hamstring muscle in sprinting-related strains, with injury typically occurring near the proximal musculotendinous junction. Fascicle length and architecture of the BFlh are frequently used as proxies for strain injury risk, though the strength of that relationship remains debated.

• Hamstring fascicle behavior during leg curl exercises performed at varying knee joint angles and loading intensities in individuals with a history of unilateral hamstring injury: a randomized cross-over design study · issue 002
• Previous Hamstring Injury Does Not Impact Biceps Femoris Long Head Fascicle Length and Eccentric Knee Flexion Strength Changes Following a Low-Volume Resistance Training Intervention in Elite Under-20-Year-Old Male Gaelic Footballers · issue 002

This definition was auto-drafted and is pending editorial review.