Warming up is important because you need to "warm up" your core and muscles and gets the blood flowing in preparation of a strenuous workout. It also helps prevent the risk of injury.
Stretching, walking, jogging, arm circles, lunges, squats and jumping jacks are good choices to include in a warm up
A good thing that would help is a pill organisation box that has the days of the week and the times to take the medications. Another thing is a chart to hang on the wall of the patients room with what medications to take and when.