A fitness center catering to women recently opened near my home. As part of its grand opening, the center offered me a free week classes which it claimed would "transform" my body. I told them I was game.
When I arrived for my first class, one of the first things my trainer asked me was whether I had brought a heart rate monitor.
When I said no, that I didn't own one, she told me that I needed to bring a heart monitor to my next session if I wanted to achieve my fitness goals.