Manga Muscle Girls「漫画の筋肉娘」
Kengan Ashura (ケンガンアシュラ) is a fighting manga written by SANDROVICH Yabako (サンドロビッチヤバ子) and drawn by Daromeon (だろめおん). Here's the description from Mangahelpers:
Since the Edo periods of Japan, gladiator arenas exist in certain areas. In these arenas, wealthy business owners and merchants hire gladiators to fight in unarmed combat where winner takes all. Toki Taouma, nicknamed "Ashura", joins these arenas and devastates his opponents. His spectacular ability to crush his enemies catches the attention of the big business owners, including the Nogi Group chairman, Nogi Hideki.
Volume 2 of the series features some female fighters, one of them very muscular:
In Volume 5, a new regular character named Karura (カルラ) is introduced, sporting some very well defined abs:
In Volume 9 and 10, there are 2 special bonus chapters of a Kengan Ashura vs Street Fighter mini-series. Poison looks pretty good in a few of the panels: