Nivayah presents with a history of myocardial infarction and type 2 diabetes. The patient reports limited endurance and shortness of breath when walking up a flight of stairs. The physical therapist wants to assess her aerobic capacity and guide the exercise prescription while considering safety due to her cardiovascular history. Which outcome measure is MOST appropriate to assess this patient’s aerobic capacity?

A) VO2 max test using a treadmill protocol

B) 6-minute walk test

C) Borg Rating of Perceived Exertion (RPE)

D) Step test

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