Since the Spartan Race is an obstacle run, part of the training includes alot of upper-body work. Not wanting to put a lot of time or money into a gym membership at this time, I went looking for a some decent exercise equipment.
My choice was the Perfect Pull Up bar - hefty, easy to put together, and easy to take down, so it doesn't take up a lot of space - as opposed to buying/setting up a pull-up/knee raise rack.
Having not performed a pull up since - well, a really long time, I decided to start off with the pyramid training session.
Start off with whatever amount of pull ups you think you can do, followed by double that amount of push-ups and triple the amount of sit-ups in a two-minute time frame. If you finish in under 2 inutes, rest. Continue the cycle for 10 minutes.
I started with one pull-up, etc., etc.,. I was able to get to three full pull-ups and finished the rest of the set negatives. Doesn't sound like a lot, but talk to me the next day. If you're not sore, you didn't do it.