What does it mean to have a physician in your corner?
Through our partnership with physicians from Cedars Sinai’s London practice, we can look inside, with clinical blood work, advanced diagnostics and body composition analysis.
The short answer
What this means for you
Most health and performance programmes work from the outside in. They observe how you move, eat and sleep, then make educated assumptions about what’s happening beneath the surface.
W1 Performance works differently. Through our partnership with physicians from Cedars Sinai’s London practice, we can look inside, with clinical blood work, advanced diagnostics and body composition analysis that give us a far clearer picture of what’s really happening in your body.
“The difference between a good programme and the right programme is data.”
Four things change when clinical insight enters your programme
Less guesswork
Advanced blood panels help reveal what’s driving your fatigue, recovery, weight and mood. We stop assuming and start responding to what your body is telling us.
A programme built on your biology
DEXA scanning gives a precise picture of your muscle mass, bone density and fat distribution, so your training and nutrition are calibrated to your physiology, not an average.
Medical oversight when it matters
For clients managing cardiac conditions, metabolic issues or other complex health challenges, having a physician involved in the programme makes a real difference. For clients who need this level of coordination throughout, it forms part of W1 Black.
Progress you can measure and trust
Biomarkers tracked over time give you an objective record of what’s improving. It shows not just how you feel, but what your body is doing.
What’s included
The clinical assessment package.
Available as a standalone assessment, as an add-on to Sprint, Build or Sustain, or built into W1 Black as standard. Delivered in partnership with Cedars Sinai physicians at their London practice.
- Advanced blood panel: metabolic health, hormones, inflammation, cardiovascular risk and nutritional status
- DEXA body composition: muscle mass, bone density and fat distribution
- Biomarker analysis: results interpreted by specialist physicians and translated into clear, actionable insight
- Physician consultation: a dedicated session to discuss your results and what they mean for your health and performance
- Programme integration: clinical findings fed directly into your W1 Performance plan
- Ongoing tracking: repeat assessments aligned with your programme reviews, so progress is measured objectively
Who this is for
The clinical assessment is right for you if…
- You’re performing well on the surface but suspect something is off underneath, whether that’s energy, recovery, weight or mood, and you want answers rather than speculation.
- You’re managing a cardiac, metabolic or other complex health condition and want your programme informed by medical oversight, not running separately from it.
- You’ve had routine blood tests and been told everything is fine, but you know a routine check and comprehensive diagnostics are very different things.
- You simply want the most complete picture of your health available, because optimising from incomplete information has a ceiling.
About Cedars Sinai
One of the world’s leading medical institutions. In London.
Cedars Sinai is consistently ranked among the top hospitals in the United States, with a global reputation for clinical excellence across cardiology, oncology, neurology and metabolic health. Their London practice brings that standard of care to the UK.
W1 Performance works directly with Cedars Sinai physicians, so every client who takes the clinical assessment benefits from the same rigour and expertise.
Find out if the clinical assessment is right for you.
Start with a Vitality Profile, or get in touch for an honest conversation with Leigh about whether this is the right next step for your health.
Written by Leigh Clayton, Performance Coach · Cedars Sinai and The Mayfair GP; General Medical Council registered physicians; NHS guidance on blood tests and DEXA scanning.
FAQ
Clinical assessment
questions
Is W1 Performance providing medical care?
No. W1 Performance is a coaching practice and Leigh is a performance coach, not a clinician. The blood panel and DEXA scan are delivered by the physicians from Cedars Sinai and The Mayfair GP that we work with, and the medical review and any onward advice sit with them and your GP. Leigh coordinates the process and uses the findings to inform your training.
What does a DEXA scan actually tell me?
It gives a precise breakdown of lean mass, fat mass and where each sits on your body, plus bone mineral density. That matters because two people at the same weight can have very different bodies, and because muscle and bone are the two things worth defending as you age. It is the measure a set of scales cannot give you.
Do I have to do the diagnostics to work with you?
No. Every programme starts with a Vitality Profile, and plenty of clients work from that alone. Diagnostics is for people who want the measured layer underneath: usually those focused on longevity, metabolic health, or making a decision about the next decade rather than the next quarter.
What happens if something concerning shows up?
It goes to the physician, which is exactly why the physician review is part of the process rather than optional. They will advise you and, where appropriate, direct you to your GP or a specialist. Leigh will adjust the coaching around whatever they recommend, and will not work around clinical advice.
How often should the testing be repeated?
A retest point is agreed when the first set is taken, and it depends on what is being tracked: body composition shifts on a shorter cycle than bone density does. The principle is that measures are worth repeating on the same instruments, so the comparison is honest.
Where does the testing take place?
At the clinic rather than at UNTIL Marylebone, because blood draws and DEXA scanning need clinical facilities and clinical staff. Appointments are scheduled alongside your coaching so you are not making two separate trips in the same week.
Related Services
Get Started
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Start with your Vitality Profile.
W1 Performance • UNTIL, 1 Orchard Street, London W1H 6HJ
Book your Vitality ProfileAppointments typically available within 1 week