Perks are enhancements you can add to a fighter for the following benefits (combat related perks only apply in fights):

Power Puncher: +5 to Boxing

Legs of Steel: +5 to Kicking

Submission Specialist: +5 to Jiu Jitsu

Take Down Machine: + 5 to the take down sub-skill

Standing Tall: +5 to the take down defense sub-skill

Endless Energy: +5 to stamina

Bangkok Ready + 5 to clinch

Star Power: 10% to fight winnings

Made of Stone: + 15 to hitpoints

Resilience: -1 Fatigue Daily