What is ONYX?

ONYX is a heated, Pilates-inspired functional training method performed on our custom reformer.

Walk into an ONYX45 class and you'll experience one seamless, powerful session. What you won't see is the system running underneath it — because behind every movement, every hold, every breath, there's something precise and intentional at work.

The ONYX Method is built on the science of muscle specificity training: the principle that different types of muscular stimulus produce fundamentally different results. Most workouts leave that to chance. We built our entire programming around it.

You'll see ONYX45 on the schedule — our signature class. Behind the scenes, our programming team runs a month-long rotation of three science-backed principles:

• FORTIFY — Muscular Endurance
• SCULPT — Muscular Strength
• BURN — Muscular Power + Cardio

Each develops a different quality of strength. Together, they build your body from every angle.