In Galaxy, talent trees were named slightly different for each class: Machinery Knowledge Tree for Mechanics, Qi Mastery Tree for Pugilists, DNA Tree for Espers, Spell Knowledge Tree for Mages, and Psychic Ability Tree for Psychics.
Pugilists focused on strength and combat, and they practiced the art of qi. Some of their skills included [Energy Burst], which is self-explanatory, and [Wavedash], which allowed instantaneous dodging of attacks.
Although Pugilists across the universe practiced and employed different kinds of teachings and techniques, all of them were centered around the use of qi.