Tight muscles
Quadratus lumborum+
Quadratus lumborum
Muscle dictionary
- Functions
- Laterally flexes and extends the trunk and stabilizes the twelfth rib during breathing
- Origin
- Posterior iliac crest and iliolumbar ligament
- Insertion
- Twelfth rib and transverse processes of the upper lumbar vertebrae
Rectus femoris+
Rectus femoris
Muscle dictionary
- Functions
- Extends the knee and flexes the hip
- Origin
- Anterior inferior iliac spine and ilium superior to the acetabulum
- Insertion
- Tibial tuberosity through the quadriceps tendon, patella, and patellar ligament
Tensor fasciae latae+
Tensor fasciae latae
Muscle dictionary
- Functions
- Flexes; abducts; and medially rotates the hip and helps stabilize the knee through the iliotibial tract
- Origin
- Anterior superior iliac spine and adjacent anterior iliac crest
- Insertion
- Iliotibial tract
Weakened muscles
Biceps femoris+
Biceps femoris
Muscle dictionary- Functions
- Flexes the knee and laterally rotates the flexed leg; the long head also extends the hip
- Origin
- Ischial tuberosity and linea aspera of the femur
- Insertion
- Head of the fibula
Gluteus medius+
Gluteus medius
Muscle dictionary
- Functions
- Abducts the hip and helps stabilize the pelvis during single-leg support; anterior fibers assist medial rotation
- Origin
- External surface of the ilium between the anterior and posterior gluteal lines
- Insertion
- Lateral surface of the greater trochanter of the femur
Rectus abdominis+
Rectus abdominis
Muscle dictionary
- Functions
- Flexes the trunk; compresses abdominal contents; and assists control of pelvic position
- Origin
- Pubic crest and pubic symphysis
- Insertion
- Xiphoid process and costal cartilages of ribs five through seven
Semimembranosus+
Semimembranosus
Muscle dictionary
- Functions
- Extends the hip; flexes the knee; and medially rotates the flexed leg
- Origin
- Ischial tuberosity
- Insertion
- Posterior medial condyle of the tibia
Semitendinosus+
Semitendinosus
Muscle dictionary
- Functions
- Extends the hip; flexes the knee; and medially rotates the flexed leg
- Origin
- Ischial tuberosity
- Insertion
- Medial proximal tibia through the pes anserinus
