Our housemate, Hans, set up this great little exercise challenge. Who can be the first one to do 10000 pull-ups, 10000 push ups, 10000 Ab Rollers (this requires one of those wheels with handles. Starting from your knees you roll out to full extension and then back in), and 10000 each of two other exercises? That's 50000 repetitions in all. Hans is maintaining a website with running totals for everyone who is playing.
Although we have little hope of winning, Tom and I have decided to join in just for the challenge of finishing the event. It's great motivation.