We went to the river this weekend and I thought it would just be a relaxing day floating on tubes. However, you can actually get a great workout from it. We paddled with our arms and legs a lot for over three miles. I felt it in my arms the next day but it was definitely worth it. It's also a good way to work on your tan but I would advise to throw on some SPF .

Well I have not given it a try but seems to be a good idea,you can enjoy and workout at the same time.