A 56-yeаr-оld wоmаn wаs hоspitalized secondary to a severe episode of shortness of breath for the past two days. Echocardiogram results indicate left sided congestive heart failure. Patient medical history includes hypertension, diabetes, bilateral knee osteoarthritis, and mild obesity. Prior level of function: ambulation with a cane, independent with ADLs. What intervention provided by the physical therapist assistant would best help this patient with their shortness of breath during functional mobility training?