I am not sure if normal yoga helps in weight reduction but I read about a new type of yoga that is practiced under heat that helps you shed weight. The aim of the exercise is to make you sweat during the workout and you will learn yoga and lose weight at the same time. This is one of the best ways to stay fit using yoga. But some people may faint due to the heat but instructors say that there is nothing to worry about. Drinking little water will be able to revive them. You can try it out if you are willing to experiment.