Thanks for responding everyone.
Cassie and Frenchhen- When I read what you both wrote, it was like a *Duh!* moment for me. Endorphins pumping, oxygen flowing. I guess I was in just such a funk on Saturday that I wasn't able to realize the basic functions of what happens to the body. Going to the gym last night though definitely helped.
April-Thanks for your experience. It was nice to see that I wasn't the only one running a little low on, well, everything. It's not a fun experience. I didn't have that great of a weekend either, so along with not working out, I wasn't in a good frame of mind. Glad to see that you're getting out of the funk as well. I'm going to Zumba in a couple of hours, and will do some weight training too. I can't wait to get back in and just take care of business.