Effective 2025, every personal training, partner training, and Tier 2 gym membership at Custom Fit SF includes unlimited DEXA body composition scans and VO₂ Max tests — at no additional cost.
Unlimited DEXA and VO₂ Max testing is included with eligible personal training, partner training and Tier 2 gym plans at Custom Fit. Schedule appointments with the testing team to review your progress.
Why This Changes What a Gym Membership Can Do
A gym membership has historically been access to equipment and, if you're lucky, programming. The missing piece has always been feedback — objective data that tells you whether the programming is working, whether your body composition is actually changing, and whether your fitness is improving in the ways that matter for health.
Without testing, you're relying on how you feel, how you look, and what the scale says. These are imprecise instruments. They don't tell you whether you gained muscle or lost water. They don't tell you whether your aerobic capacity is improving or whether you're just getting better at the specific exercises you're doing.
Unlimited DEXA and VO₂ Max testing solves this. Your trainer sees your body composition data update after each testing period, your aerobic zones adjust as your fitness changes, and your program evolves in response to what the data shows — not what either of you assumes.
What's Included in Each Membership Tier
Personal Training Membership
- 1:1 sessions with a Custom Fit coach
- Unlimited DEXA scans
- Unlimited VO₂ Max testing
- Access to group classes and Run Club
- Recovery (infrared sauna, cold plunge)
Partner Training Membership
- Semi-private training with one training partner
- Unlimited DEXA scans
- Unlimited VO₂ Max testing
- Access to group classes and Run Club
Tier 2 Gym Membership
- Full gym access across SF locations
- Unlimited DEXA scans
- Unlimited VO₂ Max testing
- Group class access
Visit our San Francisco studios
Custom Fit has studios in Hayes Valley, Market Street and Battery Street. Services vary by location. DEXA scans take place at 323 Octavia Street in Hayes Valley; confirm the location of each service when booking.
What DEXA and VO₂ Max Testing Actually Reveals
Members who test regularly typically discover things that months of gym attendance hadn't shown them:
- Whether a fat loss phase is losing fat or losing muscle
- Whether a strength phase is actually adding lean tissue
- That their aerobic base is weaker (or stronger) than their training history suggested
- That regional fat — particularly visceral fat — is changing differently than total weight suggests
The data removes the ambiguity. When you know exactly what's changing and what isn't, you can make decisions about training and nutrition that are based on your actual physiology rather than general principles applied to a generic population.
Add-On Diagnostics Available to All Members
Beyond DEXA and VO₂ Max, Custom Fit SF members can add:
- Advanced bloodwork — reviewed by a registered dietitian, not just flagged against reference ranges
- Genetic testing — interpreted in the context of your fitness and nutrition goals
- 3D Gait Analysis — for runners and anyone with movement-pattern concerns
- Strength Testing with Vault Kinetics: A 30-minute assessment at 323 Octavia Street to explore strength, power and balance with guided tests and a results review.
Start With a Baseline
The recommended entry point for new members is a Baseline Assessment: DEXA + VO₂ Max + initial consultation. This produces the data needed to build Phase 1 programming. From there, your program evolves with you — tested, measured, adjusted.