Common distortions caused by tightness is an inability to fully extend the knee, restricted
internal rotation of the hip, a weakness of the gluteus maximus, and pelvic tilted posterior (this
can lead to increased stress on the lumbar intervertebral discs)
QuADRICEPS
Rectus Femoris
Joint Action performed by the Knee and Hip
- Extension
- Flexion – respectively
For example it allows the knee to straighten
Origin: Ilium – anterior inferior iliac spine
Insertion: Tibia – Tuberosity – Patellar tendon
Common restrictions due to tightness is a restricted hip extension which causes increased load
on lumbar spine. Exercises associated with these muscles are squats and lunges.
VASTuS LATERALIS (ExTERNuS)
Joint Action performed by the Knee
- Extension
Origin: Femur – Lateral surface
Insertion: Tibia – Tibia – tuberosity – Patellar tendon
Common distortions due to tightness may form adhesions with iliotibial band and lateral tracking
of patella during gait.
VASTuS INTERMEDIuS
Joint Action performed by the Knee