What muscles could cause left chest pain?

Muscles that may contribute to left chest pain include pectoralis major, Abdominal part of left pectoralis major, pectoralis minor, serratus anterior, External intercostal muscle, Internal intercostal muscle. Trigger points, strains, or weakness in these muscles can refer pain to this area.

Chest

Left Chest

Q: What causes pain in the left chest?

Common causes of left chest pain include left pectoralis major strain from pressing exercises, costochondritis causing sharp pain at the rib-sternum junction, intercostal muscle strain from twisting or coughing, pectoralis minor tightness from rounded posture, referred pain from thoracic spine issues. The specific cause depends on the nature of the pain, how it started, and which movements aggravate it.

Left-sided chest pain can involve the left pectoralis major, intercostal muscles, or the costochondral joints. While muscular causes are common, left chest pain warrants careful attention because it can mimic or accompany cardiac conditions.

Medical Disclaimer

This information is for educational purposes only and does not constitute medical advice. Consult a qualified healthcare provider for proper diagnosis and treatment of any pain or medical condition.

Common Causes

Left pectoralis major strain from pressing exercises

Costochondritis causing sharp pain at the rib-sternum junction

Intercostal muscle strain from twisting or coughing

Pectoralis minor tightness from rounded posture

Referred pain from thoracic spine issues

Muscles in This Area

Chest

pectoralis major

The massive pectoralis major covers the chest, powering arm adduction, flexion, and rotation for bench presses and push-ups. It's the prime mover for upper body pushing strength in fitness. Building it creates that powerful chest aesthetic.

Pectoralis major rupturePectoralis strain

Chest

Abdominal part of left pectoralis major

The abdominal part of the left pectoralis major is the lower portion of the left chest's primary pushing muscle, attaching from the sternum down to the ribs near the abdomen. It drives shoulder adduction and flexion, crucial for powerful presses like bench variations and dips. Fitness enthusiasts target it for that defined lower chest line in bodybuilding.

Pectoralis major strainPectoralis major ruptureCostochondritis

Chest

pectoralis minor

Under the pec major, the pectoralis minor stabilizes the scapula, aiding shoulder protraction in dips and push-ups. Key for shoulder health in overhead athletes. It prevents winging scapula in fitness training.

Pectoralis minor syndromeScapular dyskinesis

Chest

serratus anterior

Serratus anterior wraps from ribs to scapula, protracting and upwardly rotating the shoulder blade for punches and presses. 'Boxer's muscle' prevents winging, crucial for overhead athletes.

Serratus anterior strainLong thoracic neuropathyScapular winging

Chest

External intercostal muscle

External intercostals are thin muscles between the ribs that elevate them during inhalation, aiding deep breathing for core stability in lifts. They're vital for endurance athletes needing efficient oxygen uptake. Fitness training enhances respiratory muscle power.

Intercostal muscle strainCostochondritisRib fracture

Chest

Internal intercostal muscle

Internal intercostals between ribs assist expiration and stabilize chest in lifts.

Intercostal muscle strain

Stretches That May Help

Doorway chest stretch

Wall pec stretch

Child's pose with arms extended

Seated pec wall stretch

Pec minor doorway stretch

Wall protraction stretch

Foam roller pec release

Scapular punch reverse

Doorway serratus

Side bend stretch

Seated rib expansion

Rib cage expansion stretch

Recommended Exercises

When to See a Doctor

Seek immediate medical attention if left chest pain is accompanied by shortness of breath, jaw or arm pain, sweating, nausea, or pressure sensation, as these may indicate a cardiac emergency.