Semitendinosus

Looks like

The inner hamstring with a long cord-like tendon, from the sitting bone to the inner upper shinbone.

What it does

Bends the knee, straightens the hip and turns the leg inward.

Keeping it well

Its tendon is often used to rebuild the ACL; the muscle strains in sprinting less often than biceps femoris.

Related conditions

• Botulism
• Chronic venous insufficiency
• Fibromyalgia
• Frailty & falls in older age
• Growing pains
• Heat exhaustion & heatstroke
• Lymphatic filariasis (elephantiasis)
• Lymphoedema
• Malnutrition & refeeding syndrome
• Muscle strain (pulled muscle)
• Muscular dystrophy
• Polymyalgia rheumatica
• Restless legs syndrome
• Rhabdomyolysis
• Sarcoma
• Sarcopenia
• Tetanus
• Varicose veins