Jack was a pioneer in bringing strength training and fitness to the newly emerging couch potatoes in the 1950's & 60's. Even at age 80 the guy was ripped. I'm willing to bet the current day freaks on the covers of muscle magazines won't look nearly as good at his age. Check out the rant about keeping America strong through physical fitness on the homepage of his website.
http://www.jacklalanne.com/ . Also check out the feats and honors section of his website as it is most impressive.