Jack Lalanne wasn't a vegetarian his whole life. He advocated eating meat and eggs and vegetables and staying away from bread and sugar. When the low-fat thing came out in the early 80s/late 70s, he fell for it. But since he had so many years of such a strong base of muscle and health to build on, he survived the low-fat thing very well. If you are young, you won't have any idea the icon of health and fitness that he was back in the day.
Personally, I consider it fasted if I am hungry at the time I go work out and if I do the whole workout without eating anything (such as going for a hike without breakfast, hiking until late afternoon without lunch -- that's fasted hiking. Or going to my noon workout before lunch feeling hungry and eating lunch after at about 2 -- to me that's a fasted workout. Not much of a fast.)
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Heaviest squat: 180 x 2. Heaviest Deadlift: 230 x 2