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2. Kick (association football) - Wikipedia

   en.wikipedia.org/wiki/Kick_(association_football)

   The hip is also adducted and externally rotated with knee flexion, knee internal rotation, and slight plantar flexion at the ankle joint on the kicking leg to prepare for impact with the ball. [9] When the kicking foot comes into contact with the ball, hip goes into flexion, abduction, and external rotation with knee at a slight constant ...

3. Calf raises - Wikipedia

   en.wikipedia.org/wiki/Calf_raises

   Bridging exercises are done with a flexed knee to lessen the stretch on the hamstring (a knee flexor) and focus the hip extension work on the gluteus maximus. In that same respect, the reduced knee flexion makes plantar flexion work comparable to a seated calf raise, due to the lessened stretch on the gastrocnemius (like the hamstring, also a knee flexor).

4. Medial knee injuries - Wikipedia

   en.wikipedia.org/wiki/Medial_knee_injuries

   The examiner's fingers monitor the medial joint space for gapping while placing the opposite hand on the ankle. The knee is placed in 20° of flexion. The examiner then uses their own thigh as a fulcrum at the knee and applies a valgus force (pulling the foot and ankle away from the patient's body).

5. Knee examination - Wikipedia

   en.wikipedia.org/wiki/Knee_examination

   The normal knee flexion is between 130 and 150 degrees. Any pain, abnormal movement, or crepitus of the patella should be noted. If there is pain or crepitus during active extension of the knee, while the patella is being compressed against the patellofemoral groove, patellofemoral pain syndrome or chondromalacia patellae should be suspected ...

6. Iliotibial band syndrome - Wikipedia

   en.wikipedia.org/wiki/Iliotibial_band_syndrome

   Iliotibial band syndrome (ITBS) is the second most common knee injury, and is caused by inflammation located on the lateral aspect of the knee due to friction between the iliotibial band and the lateral epicondyle of the femur. [2] Pain is felt most commonly on the lateral aspect of the knee and is most intensive at 30 degrees of knee flexion. [2]

7. Transverse ligament of knee - Wikipedia

   en.wikipedia.org/wiki/Transverse_ligament_of_knee

   When the knee is being extended the ligament prevents the anterior horns of the menisci from moving forward, and the condylar surfaces of the femur and tibia from exerting pressure on the menisci. [2] It has a restricting effect on anterior-posterior excursion of the anterior horn of the medial meniscus at lower degrees of knee flexion. [3]

8. Popliteus muscle - Wikipedia

   en.wikipedia.org/wiki/Popliteus_muscle

   Popliteus is often referred to as the "Key" to unlocking the knee since it begins knee flexion by laterally rotating the femur on the tibia. [6] Popliteus is also attached to the lateral meniscus in the knee and draws it posteriorly during knee flexion to prevent crushing the meniscus between the tibia and femur as the knee flexes.

9. Lower-limb walking pattern - Wikipedia

   en.wikipedia.org/wiki/Lower-limb_walking_pattern

   Similarly, a lack of knee flexion could potentially interfere with toe clearance and lead to compensatory patterns at the hip joint such as excessive hip flexion. Limited mobility of the ankle could also result in abnormal gait patterns. When walking at an average speed of ambulation (~1.25 m/s) the ankle joint requires at least 10-20 degrees ...