After learning so many different skills unrelated to battle and leveling them up, Ryu's body was aching to grow but it lacked the energy to do so. That's why when he disabled his passive skills for the first time, he experimented a sudden raise in all his stats and he was finally able to become stronger.
As far as he knew there was only one method to increase one's maximum energy, and it was killing something. Ryu never liked killing, taking the life of other beings just to become stronger wasn't something Ryu would do, but things were different if it was fighting for his own survival. By killing the criminals that attacked him, his maximum energy increased my leaps and bounds.
A new unencumbered Ryu found himself running at an impressive speed through the bushes in the forest near the goblin's village. His pathfinding skill allowed him to traverse without difficulties and yet, the goblins were able to follow his pace.