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