You pumped those leg weights, ran those laps, churned those sprockets on the old mountain bike. Ya, they looked good. Now they're all skinny again, or flabby again. Not much to speak of. They at least get you where you're going.
Calves are kind of boring, and generally hairy.
Knees are about like ankles. Noticed them more as a kid 'cause they were always getting beat up. Kicked in soccer, twisted in basketball. Thighs, on the other hand, you see a lot more. Right there in your lap as you look down.