Jack Lalanne passed away at the beginning of this year, aged 97. According to Wikipedia, he was
an American fitness, exercise, and nutritional expert and motivational speaker who is sometimes called "the godfather of fitness" and the "first fitness superhero." He described himself as being a "sugarholic" and a "junk food junkie” until he was 15. ... During his career, he came to believe that the country's overall health depended on the health of its population, writing that "physical culture and nutrition — is the salvation of America."There are also some relatively recent pictures of him on Michael Eades' site.