Which statement about isotonic external rotation exercises is accurate?

Which statement about isotonic external rotation exercises is accurate?

• A. They primarily target the pectoralis major
• B. They involve the infraspinatus, teres minor, and posterior deltoid
• C. They are contraindicated in all rehab
• D. They cause internal rotation

Answer: (B)

External rotation exercises strengthen the muscles that rotate the shoulder outward. The primary movers are the infraspinatus and teres minor, with the posterior deltoid providing assistance, especially at higher arm positions. Pectoralis major is an internal rotator, not a primary external rotator, so it wouldn’t be the main target here. External rotation actions produce outward rotation, not inward, so that claim isn’t correct. And these movements aren’t universally contraindicated in rehab; they’re commonly used with appropriate progression and precautions.

External rotation exercises strengthen the muscles that rotate the shoulder outward. The primary movers are the infraspinatus and teres minor, with the posterior deltoid providing assistance, especially at higher arm positions. Pectoralis major is an internal rotator, not a primary external rotator, so it wouldn’t be the main target here. External rotation actions produce outward rotation, not inward, so that claim isn’t correct. And these movements aren’t universally contraindicated in rehab; they’re commonly used with appropriate progression and precautions.