Knäflexionen

Knäflexionen are movements in which the knee joint bends, decreasing the angle between the thigh and the lower leg. This motion is central to many daily activities such as walking, climbing stairs, and sitting down. Anatomically, the primary structures involved are the femur, tibia, and patella, with the knee flexor muscles—including the hamstring group (biceps femoris, semitendinosus, semimembranosus), the sartorius, and parts of the quadriceps (especially the rectus femoris and vastus intermedius)—generating the flexion torque. Ligaments such as the posterior cruciate ligament and medial and lateral collateral ligaments provide stability throughout the range of motion.

During normal gait, knee flexion begins in the initial swing phase, reaching a peak of about 60 to 80 degrees. The range can be limited by joint pathologies, stiffness, or muscle weakness. Common conditions that affect Knäflexionen include meniscal tears, hamstring strains, patellofemoral pain syndrome, and osteoarthritis, which can restrict flexion and impair function. Rehabilitation protocols focus on restoring full range of motion, strengthening the flexor and extensor muscle groups, and improving proprioception. Exercises such as hamstring curls, seated knee flexion stretches, and controlled squat movements are frequently prescribed.

In athletic contexts, adequate knee flexion is crucial for performance and injury prevention. Coaches and physiotherapists monitor flexion deficits and prescribe targeted conditioning to enhance joint mobility. By maintaining healthy Knäflexionen, individuals support efficient locomotion, reduce compensatory strain on adjacent joints, and lower the risk of acute or chronic knee injuries.