India's Prime Minister Narendra Modi has asked world leaders to start a U.N. International Yoga Day. He was speaking about at between by for from in of on with the U.N. General Assembly about at between by for from in of on with New York. It was his very first speech about at between by for from in of on with the 193-member General Assembly. He spoke about at between by for from in of on with the benefits about at between by for from in of on with yoga, saying it was good about at between by for from in of on with the mind and body, and could also help climate change. He said yoga provides harmony about at between by for from in of on with humans and nature, and is "an invaluable gift" about at between by for from in of on with India's 5,000-year-old culture. Modi said: "It is not about at between by for from in of on with exercise, but to discover the sense about at between by for from in of on with oneness with yourself, the world and the nature." He added: "By changing our lifestyle and creating consciousness, it can help us deal about at between by for from in of on with climate change." Many doctors and people about at between by for from in of on with the medical community say yoga is a good way to stay physically and mentally healthy. Yoga makes you focus about at between by for from in of on with exercise, breathing and meditation. A lot about at between by for from in of on with research says it can help people about at between by for from in of on with heart disease, high blood pressure and lower back pain. Studies also say yoga can improve our mood, reduce stress and make us sleep better. However, there is also research that says people need to be careful when doing yoga. Wikipedia says: "An extensive survey about at between by for from in of on with yoga practitioners about at between by for from in of on with Australia showed that about at between by for from in of on with 20 per cent had suffered some physical injury while practicing yoga." A World Yoga Day already exists. It was started about at between by for from in of on with the world-yoga-day.org website about at between by for from in of on with 2007.