My sister Dana just signed me up for the "Cross Fit Challenge."
It takes one month.
It is (in addition to your normal swimming/biking/running):
Week 1: 50 sit-ups and 10 push-ups per day
Week 2: 100 sit-ups and 20 push-ups per day
Week 3: 150 sit-ups and 30 push-ups per day
Week 4: 200 sit-ups and 40 push-ups per day
Today was my first day, and I had to take a few breaks. 50 sit-ups is a lot harder than it seems, especially when you normally do crunches.
I am going to look so good by the end of this month. ha. awesome.