I was incredibly thrifty as a young yogi. I wore old T-shirts and unflattering sweatpants from Kohl’s. I used a $22 Gaiam yoga mat I’d picked up at Barnes & Noble. At the very beginning, I didn’t even pay for classes. As one of the test subjects for a New York Post story on diet books, I received a free, three-month gym membership for New York Sports Club. That was when I tried yoga for the first time.