Fluidity barre class at David Barton Gym

By matching the bar to your height, you stretch and strengthen muscles and posture in “perfect alignment,” which keeps you balanced and free of chronic pain, Fluidity inventor Michelle Austin says.

Fluidity allows for exercises that would be impossible on a wall-mounted bar.

A classic dancer warmup is designed to open up hips and release tension in the back.

Instructor Desiree Lanz, left, leads a class as Maryanne Olson participates at David Barton Gym in West Los Angeles.