What Jack LaLanne Did For Your BodySam Biddle1/24/11 4:40pm1441EditPromoteGo to permalinkJack LaLanne wasn't just a fitness guru. Mere fitness gurus don't tow 70 rowboats—while handcuffed—at age 70. Jack was a powerhouse. He died today, at 96. But not before eating and lifting his way through exercise gear history.