If all else fails… play the Wii:
My family and I have hopped, punched and jumped our way to giddy exhaustion playing the Wii. I’m surprised at how sore I can be after swatting a virtual ball in Wii Tennis. And it’s FUN! There are plenty of games that will keep you moving. Two you might want to try: Wii Outdoor Challenge, about $49.99 on Amazon.com or Just Dance 3 also available at Amazon.com for $34.99.