Yoga is no doubt very useful physical exercise which helps person to mold his body in particular shape. You can find plenty of material online about the benefits of Yoga but here i am going to discuss its disadvantages. First of all without any guidance never start Yoga. If you are patient of blood pressure, asthma, cancer or any other disease consult you doctor before starting Yoga. Never eat lot of food or drink lot of water before starting Yoga otherwise it can be harmful.