I've seen all of those movies.
After reading your reply, I started watching "Over the Top".
So Stallone was like 175-lb, but beats massive giant men at arm-wrestling?

Totally unrealistic.
I should watch Rocky IV yet, which came out a year after Over the Top.
Wasn't Stallone supposedly fighting against the juiced up Ivan Drago in Rocky IV? Meanwhile, I recall him being much larger in Rocky IV compared to Over the Top.
How was that transformation not a steroid one?