Teres major

Looks like

A thick rounded muscle from the lower corner of the shoulder blade to the front of the upper arm bone.

What it does

Pulls the arm down and back and turns it inward, working with the latissimus dorsi.

Keeping it well

Can be strained in throwing and pull-ups; rest then gradual loading helps.

Related conditions

• Botulism
• Fibromyalgia
• Frailty & falls in older age
• Frozen shoulder (adhesive capsulitis)
• Heat exhaustion & heatstroke
• Malnutrition & refeeding syndrome
• Muscular dystrophy
• Polymyalgia rheumatica
• Rhabdomyolysis
• Sarcoma
• Sarcopenia
• Shoulder dislocation
• Tetanus