Will You Join the 12 Days of Fitness Challenge?

Anybody up for a fitness challenge? I'm slow on the ball to post about it--I've already started!--but this is making the rounds on Facebook:

http://tribesports.com/blog/the-12-days-of-fitness

Check out the link to see their full 12 Days of Fitness lyrics. :D

I'm on Day 3 today. I could not hold a 2-minute wall squat yesterday (managed a minute twenty) and  it's doubtful my knees would handle today's 3-minute bridge, but I will do what I can!