I am so sore!

I took a Tai Chi class last night with a co-worker. It was an hour and a half long class, and with the exception of the first position we did (which we held for about 10 minutes), it didn't seem that long at all. There weren't any weights or anything other than my own body used for resistance. But, man am I feeling it today! Most of the moves were done in the horse position which is accomplished by spreading the feet just a little over shoulder-width apart, pointing the toes outward about 20 degrees, bending the knees so that the knee caps are directly over the top of the feet and tucking the hips in so that the spine is completely straight. And, despite my thighs not hurting too much during the class, they're completely killing me today! It's not debilitating, but doing normal things like walking down steps, sitting down and bending over are torturous. But it feels good at the same time, you know? And, clearly, it worked muscles that neither the elliptical nor the cord resistance program do. So, I plan to go back next week; it's very cool (even though I pretty much sucked at it).