By it’s nature, a regular daily yoga practice can create weight loss. Many of the poses work to bring balance to the endocrine and digestive systems, supporting weight loss. The classical sun salutation, for example works every system within the body, increasing strength, flexibility and endurance. I’ve had many students, over the years, who changed their bodies through daily practice. A moderately heated room (80 F) is enough the warm the body and increase flexibility in a safe way. Producing sweat during asana practice is a good thing – purification through heat.