Yoga is Intense

I have wanted to take a yoga class for several years, since I was an undergrad student at UC Berkeley. I just never had the time. In my previous life, as a fully employed HR Manager/grad student at SJSU, I was not able to indulge my time-consuming whims. I am happy to report that with my new found freedom from corporate America, and my shiny new YMCA gym membership, my dream finally came true. I took my first yoga class. Boy am I sore all over! Everything hurts. My lower back is revolting and I have muscles that ache that I didn't even know existed. Yoga is as awesome as I expected it to be and I am definitely going to continue taking classes, but it is INTENSE.