In a 2006 study, it was concluded that the subjects that lost weight and kept weight off  engaged in activities that were also mentally soothing everyday along with physical exercise everyday (http://www.ijbnpa.org/content/3/1/17).  The study's conclusions findings suggest that the subject, by thier own choice, set themselves up  a work and rewards system in order to have continued success. 
Why is this information important?  Three reasons. First, I want to point out that I was prepping you for a thought about weight loss as it relates to yoga.  Second, when adding a new activity or behavior into your daily life, you need to also add an encouraging support (work and reward for that work).  This concept is the key to continued success of any new lifestyle change. Second, to those of you who do not know the experience of yoga, yoga not only helps you to lose weight BUT it helps you have, what can be, an amazing inner (mental, reflective, or even spiritual) experience, granted you reach a class attendance of at least 4 days a week consistently (for a prolonged period of time or working toward a long committment).  Yoga is a physical practice that can bring about both weight loss and reward all in itself.  That is why the yoga community is rapidly growing.  So, try the very popular, introductory special of 10 classes for 10$ and try out yoga and see how it will benenfit your life.

Emily Kathryn Narayan, RYT

Yoga has many benefits.  So why choose Hot Yoga?  Or, more specifically, why choose hot yoga for weight loss? How does weight loss occur with Hot Yoga?
"The heat of a hot yoga class does not cause permanent weight loss. You'll lose water weight, temporarily, through sweating. When you rehydrate, however, your body will regain the water it needs to function properly, and your weight will return to normal. However, the heat raises your heart rate slightly. As you sweat, your blood volume decreases because of dehydration, and your heart must pump faster to keep the blood flowing throughout your body. In this way, the heat helps you reach and maintain your target heart rate, achieving a level that burns calories effectively."
- http://www.livestrong.com/article/401127-weight-loss-benefits-of-bikram-yoga/

Emily Kathryn Narayan, RYT