As Vegeta never fails to mention, the Saiyans are the ultimate warrior race who live for battle. Dragon Ball Z finally showed us the origins of Goku's actual race in the Saiyan Saga, which culminated in the legendary battle between Goku and Vegeta in a fight which ended with both warriors bloodied. Despite their bodies being bruised and battered to the point where they couldn't even stand up anymore, the Saiyans were both stronger at that stage of the battle than they were when it began.