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Semitendinosus

Region

Origin & Insertion

['Origin: Ischial tuberosity', 'Insertion: Medial tibia (pes anserinus)']

Synergistic Muscles

['Semimembranosus', 'Adductor magnus']

Joints

['Hip', 'Knee']

Primary Actions

['Hip extension', 'Knee flexion', 'Medial rotation of knee']

Nerve & Spinal Segment

Tibial portion of sciatic nerve

Sacral plexus; L5–S2

Interesting

Forms part of the pes anserine group. [Moore's]

Reversal of Action

Elevate pelvis toward thigh

Common Dysfunctions

Hamstring strain, tibial rotation imbalance

How to Stretch

Seated hamstring stretch with IR.

Trigger Points

How to Strengthen

Prone curls and bridges.

Concentric Action

Extend hip, flex knee

Applications:

Important in rehab for ACL, hamstring injuries

Eccentric Action

Lower leg during walking

Isotonic Action

Bridges, sliding leg curls

Related Conditions

['Pes anserine bursitis', 'Hamstring strain']

Isometric Action

Sustain hamstring bridge hold

Exercise Ideas

['Hamstring sliders', 'Single leg bridges', 'Toe reaches']

Related Blogs

Images

Videos

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