H R Nagendra, fondly called Guruji by our PM Narendra Modi, is 72 years old starts his day as early as 1.30am and goes on till midnight without a single break. It is nothing but a Yoga protocol that keeps him fit all throughout the day. Guruji heads swami Vivekananda Yoga Aunusandhana Samsthana Yoga University in Bangalore. He has designed a yoga protocol that is to be followed by 240 countries.
Source: http://goo.gl/L1WNim