I'm gonna guess he never bothered to train calves until someone pointed out that his were under-developed. Can't really explain the drastic improvements otherwise.
Lol at the suggestion that they're implants .. yeah sure, the world's best implants, the likes of which have never been seen since
I knew a guy who actually had implants in the early 1990s. There was no way you could hide the
scars if you looked. They were blended in with the natural creases right behind the knee but there
was no hiding them. You could fool normal people who don't analyze someone's legs and they wouldn't
notice until you pointed them out.
You can be sure if there were even such a things as calf implants in the early 1970s it would be much
worse. Plus, you can see how Arnold's calves shrunk considerably between 1975-1979 when he
retired. He brought them right back up in 1980. I remember Joe Meeko insisted that Arnold also had
pec implants. Meeko was an exceptionally good guy but jealousy gets even the best of them.