Never more than twelve.
Never the same program.

Coached strength training in a group of never more than 12 people — often fewer — where the programming is individual rather than shared. At proof3, your working weights and progressions come from your own proof3 Assessment, and a coach adjusts them during the session. It sits between a fitness class, where everyone does the same thing, and one-to-one personal training.

That's the most common thing we hear, and it's why the assessment comes first. We screen how you move before anything gets heavy, your starting weights come from your own testing rather than a class average, and a coach watches your setup during every session.

After the first 30 days, most members at proof3 invest between $249 and $299 per month for unlimited small-group training, ongoing assessments, personalized coaching and the tracking technology. The first 30 days are priced separately because they include the proof3 Assessment, a private 60-minute session and a nutrition and lifestyle strategy.

No. The assessment exists precisely so nobody has to guess where to begin. Most people who start with us haven't trained seriously in years, or have never lifted with a coach watching. You start where you are.

Yes, and it becomes more important with age, not less. Adults lose muscle mass steadily from their 30s onward, and resistance training is the most direct way to slow that. The risk comes from loading a movement pattern that isn't ready — which is why we screen how you move before anything gets heavy.

Yes, and this is a growing reason people come to us. Rapid weight loss on a GLP-1 takes lean mass along with fat unless you're training for strength and eating enough protein. Because we measure body composition rather than just weight, you can see whether what you're losing is fat or muscle — and adjust while it still matters.

We offer both. One-to-one gives you a coach for every repetition and suits people managing a specific injury or chasing a narrow goal. Small group gives you individual programming with a coach watching the room, at a lower cost, with other people training alongside you.

Sixty minutes. Our 30/30 session is 30 minutes of strength work followed by 30 minutes of endurance. Base40 is a dedicated endurance session, also 60 minutes.

9220 East Vía de Ventura, Suite 121, Scottsdale, AZ 85258 — in the Salt River area, convenient to north Scottsdale, Paradise Valley and northeast Phoenix.