From LSWiki

Class: Athletic Skills
Attribute: Agility
Pedagogy: Physical Training
Practitioner Term: Practitioner of Balance

The skill of maintaining one's balance.  This skill helps keep one from being knocked down and helps one perform feats like walking
narrow beams and ledges, or even ropes and wires, for the highly skilled.

Trainers

Trainers: 
Losthaven: Raelan Jax
Sloan: Knuric
Liathyr: Celifere
Association required:
Brotherhood of Wine and Song: Danilo Thann
Maidens of the Spear:  Sulin
Guild required:
Coven: Lynda Xenetha
Nizari: Hasan Wanders
Quest required