Applicаtiоn: Fluid Bаlаnce & Cardiоpulmоnary InteractionRobert, 72 year old with Congestive Heart Failure and hyponatremia, reports lightheadedness during therapy. His medications include a diuretic and beta-blocker.What might be the physiological cause of Robert's symptoms?How should you modify the session to support safe participation which still meeting therapeutic goals?