Yes, this happened to me, too.
The way I rationalized the soreness was that I was moving to new places in my practice–and, more importantly, my body. In feeling stronger and more confident in class, I pushed myself further. And, in pushing myself further, I tapped into new muscles, worked through untapped tension, and stretched my muscles further. All of that is going to lead to increased soreness.
But that soreness is good, healthy. It means you’re pushing your body to a place it hadn’t reached yesterday. And that’s what this yoga is all about, right?
The most important thing to remember is to keep going to class, even if your muscles ache. Because class will help get all that lactic acid out of your muscles, which will only make you feel better!!
Good luck! And, always, namaste.
Hannah