Doubt Already? (Day 3)

I have now hit the 3rd day in my workout sessions and I'm not sure how much more I can push myself. My body has begun to reject the idea of moving more than to get up from my bed and make my way over the to fridge for one of my 5 portioned meals I am suppose to be eating a day. Luckily, this workout surprised me with the content I'd be exposing my body to. As usual, I started out with warm up exercises to get my body hot and my heart rate up. However, rather than a completely cardiocentric work out, or what I'd consider to be cardio, a few potions in the line up invoked working out a few upper body muscles. This was a welcomed addition has my lower body was feeling it's max prior to even starting.