God told Isaiah to give everyone a visual lesson. He wasn't wearing fancy clothes in the first place but now he's walking naked and barefoot. Granted that social attitudes were a bit different then and still today there are places where people walk naked. It was a form of humility. God says that He will humble the haughty. I read a commentary that thought it should read three days and that he felt it unlikely that the prophet went three years. I suppose that's possible but I take the text at face value and believe he was three years naked.
Today's workout, Full body intervals, 4 times through
high step R, push-up, high step L, windmill, pull up, lunge, Russian twist, biceps curl, triceps extension