Swami Yogananda is a 99 year old Yogi who in association with Art of Living Foundation travels around the world to teach his style of yoga called ‘Sukshma Vyayama’.
Swami Yogananda has never taken medication in his 99 years of life on earth. He is such an expert at preserving the energies he gained through yoga that he eats only once a day, and after three days of food he takes up fasting for a week! Physically he is very much fit and healthy, mentally alert as well. He’s learning the English language at this age and hopes to write a book on yoga!
source: thanks to srinig