Just in case any of the Amazonian fans are interested, but you might want to check out this movie the next time it airs on the Sci/Fi channel:

Deathlands: Homeward Bound (2003)

http://www.scifi.com/deathlands/

There are no scenes of muscle growth or size changing, but there are a few with violent bone-crushing hyperstrength demonstrated by the red-haired Krysty Wroth mutant character (played by nicely fit-toned Jenya Lano).  The personality transition-switch from mild mannered to aggressive Amazon seems to have elements of Red Sonja and Wonder Woman (Gaea, give me strength) with just a touch of the Savage She-Hulk to it.

After watching it, I can’t help but wonder if James Axler and the concept behind his Deathlands books weren’t more then a little influenced by the sci/fi Horseclans series that was written by Robert Adams.

Robert Adams certainly was quite a prolific writer before he passed away around 1988, the year his last of his Horseclans novels was published - Number 18.  (Plus two anthologies w/ "Friends of the Horseclans" where he let other writers try their hand at the fictional world he had created).  He was one of the few mainstream authors that had a regular element of muscular Amazons in his stories, especially those involving the Bili the Axe character - who incidently was married to one of them.

In many ways, he was the Edgar Rice Burroughs of his day, even to focusing on the female characters as primary elements to the story, rather then as backdrop support to the male ones.  The "Castaways in Time" series, as Alt-History, were interesting, fast moving reads, too.