India's leader has asked other world leaders at the United Nations to start an International Yoga Day. He told them yoga was good for the mind, body, and climate change. He said yoga shows us harmony between humans and nature. He called it "an invaluable gift" from India. He said: "It is not about exercise, but to discover the sense of oneness with yourself, the world and the nature." He said we could deal with climate change if we changed our lifestyle.

Many doctors say yoga helps us stay physically and mentally healthy. Exercise, breathing and meditation help people with heart disease, high blood pressure and back pain. It can make us happier, reduce our stress and make us sleep better. People need to be careful when they do yoga. A survey in Australia showed that 20 per cent of people who did yoga got injured. There is already a World Yoga Day. It was started by world-yoga-day.org in 2007.