Which statement describes the endurance-focused strengthening approach in TOS physical therapy?

• A. Strengthening of weak muscles (endurance)
• B. Scalenectomy
• C. First rib resection
• D. Neurolysis

Answer: (A)

Endurance-focused strengthening means training muscles to perform work for extended periods, using low loads with high repetitions to build muscle endurance rather than maximal strength. In thoracic outlet syndrome rehabilitation, this approach targets the muscles that support the shoulder girdle and neck—especially scapular stabilizers and deep neck flexors—to maintain proper posture and stable space around the neurovascular bundle during daily activities and overhead tasks. By improving endurance, these muscles resist fatigue that can worsen compression and symptoms, helping prevent positional impingement of the thoracic outlet.

In practice, you’d emphasize gentle, repetitive strengthening with correct technique, focusing on endurance-oriented sets and gradual progression, rather than heavy resistance or maximal lifts. This contrasts with surgical options like decompression procedures, which physically widen the outlet rather than retraining muscle function.