Where did my energy go?

After last Thursday's weigh in, I continued to strongly pursue a higher level of fitness and to challenge myself. Both Thursday and Friday nights I did 1 hr on the elliptical followed by weights. Saturday morning: Zumba.

After that, I went to a pic-nic with my kids. We had a great time in a larger group of friends. We played badminton, danced, I even flipped a few cartwheels with some little girls (guess how many years it'd been since I'd done a cartwheel!). Later that afternoon a group of us went on a walk to go see Elk in the nature preserve we were in. That was a good walk, but not super long. Another hour of dancing and I was exhausted by the evening.

I went home and listened to music while reading my book on my couch. My feet never felt so relieved!

Sunday morning I went to Zumba again. I love that class so much and can't miss it. I wore my new heartrate monitoring watch and saw that I burned 530 calories in one hour of that class!

After returning home I was completely drained! I spent most of the rest of my day in the couch doing nothing! I couldn't believe my exhaustion and blamed it on my adventures of the previous day. I'd concluded all my crazy working out had finally caught up with me. Little did I know, I was starting a cold and didn't know about it. This morning I woke up with a sore throat and feeling generally crappy.

So now I'm wondering: was my exhaustion caused by all the activities I've been doing lately or was it caused by my impending cold? I'm leaning towards the cold answer. I really believe if I didn't have this cold, I might have been tired but not completely drained like I was yesterday.

Tonight I'll either not work out at all, or maybe go to the hot tub at the gym. I'm having some muscle soreness on my back which could use some hot water relaxation.

Does anyone have any suggestions to get my energy level back up?