And in addition to having freakish strength for his size and just in general apparently, he speculates only a few men ( Greatjon, Strongboar, etc.) could match him.
To me it’s describing literal physical strength, although he is a gifted swordsman too. Jaime is noted as extremely strong right after it’s stating that he’s muscular, implying that he’s extremely strong with his body Jaime is a pound for pound badass. In this description, Does being “extremely strong” refer to his literal physical strength or his martial abilities? In the wiki’s description of Jaime, it states “ He is muscular and extremely strong, musing at one point that he could only think of a few men in the Seven Kingdoms stronger than him.