I know that Mr Maujean spends quite a bit of time doing burpees, which it would be great to hear more about, and it's odd to think of exercise as being an important part of leisure, but it is.  My own exercise, when I get around to it, consists primarily of hiking, walking, and riding my rather heavy bicycle.  However, The Art of Manliness recently posted an article called The Odd Object Training Primer that includes a number of exercise ideas that sound rather entertaining.