Which of the following statements is correct about the use of arm exercises (upper extremity ergometry)versus leg exercises (treadmill walking,bicycling)in a cardiac rehabilitation program? A) There are no differences in responses of the cardiopulmonary system with arm exercises versus leg exercises. B) Myocardial O₂ consumption (heart rate $\times$ systolic blood pressure)is higher with arm exercises than leg exercises. C) Myocardial efficiency is lower with arm exercises than with leg exercises. D) Patients with coronary artery disease typically are able to complete less work with leg exercises than arm exercises before symptoms occur.

Question

Quizplus · Accepted Answer

Myocardial oxygen consumption is higher with arm exercises than with leg exercises. This is because the upper extremities have a smaller muscle mass than the lower extremities, thus requiring greater oxygen consumption to produce the same amount of work.

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