Cybernetic and/or Nanotech enhancements to the human body which provide either increased functionality of current abilities or entirely new capabilities.
His biomechanical augmentations allowed him to see in the dark and jump 30 feet into the air!
Biomechanics studies peoplemovement, because if they're not moving, they are dead.
Dude #1: "Hey dude, wake up, we gon' play some ball outside"
*Dude #2 lying motionless*
*Dude #1 starts crying because Dude #2 is dead because he's not moving and he Dude #1 can't study Dude #2's biomechanics*