Navratil Longevity Assessment Software
The most comprehensive field-based biological age assessment platform available anywhere in the world — 50+ validated markers across 11 biological domains, delivered in a single session, with no expensive laboratory infrastructure required.
What the Software Does For You
A complete clinical longevity platform — built for practitioners who want to deliver world-class assessments without expensive laboratory infrastructure.
- 50+ Validated Markers
- 11 Biological Domains
- No Expensive Equipment
- Biological Age Per Marker
- Built for Practitioners
- Landmark Science Behind Every Score
Software Features
Persistent Client Database
Every client and every visit is stored directly inside the software file. No internet, no cloud subscription, no data privacy concerns. Your entire practice database travels with one HTML file.
Multi-Visit Progress Tracking
Record second, third, and subsequent assessments for each client. The software stores the complete history and lets you compare any two visits side by side — showing exactly which markers improved, declined, or held steady.
Biological Age Per Marker
Every individual marker — from grip strength to sleep quality to ApoB — generates its own biological age estimate. Clients see not just an overall score but a granular map of where they are aging fast and where they are excelling.
Auto-Generated Recommendations
For every flagged marker the software automatically drafts personalised practitioner recommendations — prioritised by urgency. Editable before export, so you can customise the language for each client before printing or sending.
VO₂max Auto-Calculation
Enter the YMCA step test heart rate results and the software instantly calculates a validated VO₂max estimate — no manual formula lookup needed. The strongest single predictor of longevity, calculated in seconds.
7-Site Skinfold Body Fat Calculator
Enter the seven skinfold measurements and the software applies the Jackson & Pollock formula with the Siri equation automatically — calculating body fat percentage in real time as you type each measurement.
Validated Stress Questionnaire (PSS-10)New
The full 10-item Perceived Stress Scale is built directly into the assessment, auto-scored from 0-40. Chronic stress is a major driver of cortisol dysregulation and accelerated biological ageing.
Validated Sleep Questionnaire (PSQI)New
The full 19-item Pittsburgh Sleep Quality Index is integrated directly into the software, automatically calculating all seven PSQI components into a global score (0-21) — replacing manual sleep entry with a clinically recognized instrument.
Validated Diet Questionnaire (PREDIMED)New
The 14-item PREDIMED Mediterranean Diet Adherence Questionnaire is built in, auto-calculating a 0-14 score from the most extensively studied dietary pattern for longevity outcomes.
PDF Report Export
Generate a professional, branded PDF report for the client with one click — including all biological age results, status ratings, recommendations, and section summaries. Ready to print or email immediately after the assessment.
See the Software in Action
Real screenshots from the Navratil Longevity Assessment Software, showing the structured, guided workflow practitioners use with every client.
Client Intake & Anthropometrics
Structured intake capturing client demographics and anthropometric measurements — every field includes built-in guidance.
Cardiovascular & Autonomic Function
Resting HR, blood pressure, HRV and autonomic markers — core to the #1 cause-of-death cardiovascular domain.
Sensory & Stress Assessment (PSS-10)
The validated 10-item Perceived Stress Scale is built directly into the software, auto-scored from 0-40.
Blood Markers Panel
Metabolic, lipid and inflammatory blood markers with built-in optimal-range guidance for every value.
Sleep Quality Assessment (PSQI)
The full 19-item Pittsburgh Sleep Quality Index auto-calculates a global sleep score across all seven components.
Client Database
Every client’s assessment history is stored and searchable, with overall biological age, functional age, and cognitive age tracked visit over visit.
Full Marker Results
Every biomarker is scored individually with its own bio-age and status flag — Optimal, Caution, or Danger — for fast, at-a-glance interpretation.
Branded PDF Report — Overview
A polished, client-ready PDF report opens with overall biological age, a domain-by-domain breakdown, and every measured marker with its bio-age.
Branded PDF Report — Priority Action Summary
The report concludes with a ranked Priority Action Summary, translating results into specific exercise, nutrition, supplement, and lifestyle guidance.
Every Marker Explained
Every single field in the assessment includes a built-in info icon that explains exactly what the marker measures and how to measure it correctly — so practitioners never need to leave the software to look up a protocol.
Why It Matters
Each marker’s info icon explains the scientific rationale behind the measurement — for example, why waist circumference is a stronger mortality predictor than BMI, or why grip strength predicts frailty risk.
How To Measure It
Step-by-step measurement protocols are built into every field — for example, the exact anatomical landmark for a waist measurement, or the correct caliper technique for a skinfold site.
Consistent, Reproducible Results
Because every practitioner follows the same built-in protocol for every marker, results stay consistent across visits, staff members, and locations.
Certification Strongly Recommended
To use this software to its full clinical potential and to ensure assessments are conducted with scientific rigour and professional integrity, it is strongly recommended that all practitioners complete all three of the following courses from Dr. Frank Navratil prior to use:
Course 1: Longevity Science 1
Dr. Frank Navratil
Course 2: Longevity Science 2
Dr. Frank Navratil
Course 3: Longevity Assessment
Dr. Frank Navratil
All 3 courses are required to achieve your Certified Longevity Assessment Practitioner Certification.
Designed for Every Longevity Professional
Whether you work in a clinic, a gym, a spa, or independently — if you assess human health and performance, this Software was built for you.
Medical Doctors & GPs
Extend consultations beyond disease management into proactive health optimisation, grounded in the same evidence base used in top longevity research centres.
Naturopathic & Functional Medicine Practitioners
The Software’s holistic 11-domain approach mirrors the integrative philosophy of naturopathic and functional medicine.
Longevity Clinics & Wellness Centres
Deliver a premium, science-backed longevity assessment service without building expensive laboratory infrastructure.
Personal Trainers & Strength Coaches
Move beyond body composition and fitness testing into true healthspan assessment, tracking a biological age for every physical marker.
Health Coaches & Lifestyle Practitioners
Give your coaching practice a scientific backbone with before-and-after biological age data to demonstrate results.
Luxury Spas & Medical Retreats
Elevate your guest experience with a world-class biological age assessment as a signature service.
Corporate Wellness Programmes
Offer employees a meaningful health benefit that identifies modifiable risks early and reduces healthcare costs.
Sports Medicine & Performance Physicians
Granular physiological profiling for athletes — track biological age across seasons and identify performance-limiting domains.
Neurologists & Cognitive Health Specialists
The full MoCA with six subdomains provides a rich cognitive aging profile, ideal for early dementia risk screening.
Nutritionists & Dietitians
The integrated PREDIMED score, metabolic markers, and inflammatory markers create a complete nutritional-biological profile.
Geriatricians & Elder Care Specialists
One of the most thorough non-hospital frailty assessments available, critical for fall prevention and independence planning.
Researchers & Academic Institutions
A standardised, reproducible, multi-domain biological age protocol suitable for longitudinal research studies.
Major Causes of Mortality — Addressed by the Software
The eight leading causes of death and functional decline in adults over 65 — and how the Software’s markers detect and predict risk in each domain.
| Cause | Share of Deaths | Key Markers Assessed |
|---|---|---|
| Cardiovascular Disease | ~30% | VO₂max, Resting HR, Blood Pressure, HRV, ApoB, LDL/HDL, ABI, hsCRP, HR Recovery, Triglycerides, Homocysteine, Grip Strength, Waist Circumference |
| Cancer (risk environment only) | ~25% | hsCRP, IGF-1, Fasting Insulin, HOMA-IR, Body Fat %, VO₂max, PREDIMED Score, Visceral Fat, Sleep Duration |
| Neurodegeneration & Dementia | ~12% | MoCA Total & Subdomains, Reaction Time, Verbal Fluency, VO₂max, HRV, PSQI, Homocysteine, Speech in Noise, Loneliness Score |
| Metabolic Disease | Rapidly rising | Fasting Glucose, HbA1c, Fasting Insulin, HOMA-IR, Triglycerides, HDL, Waist Circumference, Visceral Fat, Skeletal Muscle % |
| Respiratory Disease | ~8% | Peak Flow (% predicted), Respiratory Rate, VO₂max, BMI, hsCRP |
| Falls, Frailty & Sarcopenia | #1 cause of disability | Grip Strength, Grip Asymmetry, Skeletal Muscle %, Balance (eyes closed), Sit-Rise Test, Walking Speed, Chair Stand |
| Social Isolation & Loneliness | 29% increased mortality | UCLA-3 Loneliness Scale, Close Relationships, Life Satisfaction, PSS-10 Stress Score, HRV, Cortisol, PSQI Sleep Quality |
| Immune Decline & Infection | Rising with age | hsCRP, Vitamin D, Vitamin B12, IGF-1, Sleep Duration & Quality, Stress Score, Cortisol, VO₂max, PREDIMED Score |
Evidence Strength by Domain
| Domain | Key Markers | Evidence | Landmark Study |
|---|---|---|---|
| Cardiorespiratory | VO₂max, HR Recovery, HRV | Strong | Kokkinos et al. 2022 — 750,000 subjects |
| Muscular Strength | Grip Strength, Push-ups, Chair Stand | Strong | Leong et al. 2015 — 140,000 subjects, 17 countries |
| Body Composition | Visceral Fat, Waist Circ, Skeletal Muscle | Strong | Despres et al. — visceral fat drives metabolic syndrome |
| Blood Lipids & Metabolism | ApoB, HbA1c, HOMA-IR, Triglycerides | Strong | INTERHEART Study — 9 risk factors explain 90% of MI risk |
| Inflammation | hsCRP, Homocysteine, Cortisol | Strong | Ridker et al. JUPITER trial |
| Cognitive Function | MoCA, Reaction Time, Verbal Fluency | Strong | Lancet Commission 2024 — 45% of dementia preventable |
| Sleep | Duration, PSQI, Onset, Wakings | Strong | Walker 2017 |
| Lung Function | Peak Flow % Predicted | Strong | Schünemann et al. |
| Functional Mobility | Sit-Rise, Balance, Walking Speed | Strong | Brito et al. 2012; Studenski 2011 |
| Hormonal Health | IGF-1, Cortisol, Vitamin D | Moderate | Multiple cohort studies |
| Lifestyle Behaviours | PREDIMED, Exercise, Steps, Smoking | Strong | PREDIMED trial — 30% reduction in CV events |
| Social Connection | UCLA-3, Close Relationships, Life Satisfaction | Strong | Holt-Lunstad 2015 — 3.4M people, 29% mortality increase |
| Peripheral Vascular Health | Ankle-Brachial Index (ABI) | Strong | ACCF/AHA Guidelines |
| Sensory Aging | Speech in Noise, Contrast Sensitivity | Moderate | Lancet 2024 — hearing loss is largest modifiable dementia risk |
The 11 Pillars of the Assessment
Each domain addresses a distinct biological aging pathway.
Body Composition
Visceral fat, muscle mass, fat distribution
Functional Fitness
Strength, mobility, balance, flexibility
Cardiovascular
Fitness, autonomic function, vascular health
Cognitive
Memory, executive function, processing speed
Sleep
Duration, quality, architecture (PSQI)
Lung Function
Respiratory capacity and efficiency
Lifestyle
Exercise, diet (PREDIMED), smoking, sedentary behaviour
Social & Wellbeing
Loneliness, connection, life satisfaction
Metabolic & Lipids
Glucose, insulin, cholesterol, inflammation
Hormonal & Micronutrients
IGF-1, cortisol, vitamin D, B12
Vascular & Sensory
ABI, hearing, vision
Honest Limitations
Equipment You Will Need
The Navratil Longevity Assessment combines anthropometric, functional, and physiological testing into one structured evaluation. Below is the full list of equipment used to gather accurate, consistent measurements during a client session.
Hand Dynamometer
Measures maximal hand grip strength, one of the most reliable predictors of overall strength, frailty risk, and biological ageing.
Grip StrengthSkinfold Calipers
Pinches and measures skinfold thickness at multiple body sites to estimate body fat percentage using standard equations.
Body CompositionDigital Weight Scale
Provides accurate body weight readings, a foundational anthropometric measurement used throughout the assessment.
WeightStadiometer
A wall-mounted or portable height-measuring device, used to calculate BMI and other anthropometric ratios.
HeightFlexible Measuring Tape
Used to measure waist, hip, thigh, and other body circumferences for body composition and cardiometabolic risk assessment.
CircumferencesSit-and-Reach Box
A standardized box used to measure lower back and hamstring flexibility, an important marker of musculoskeletal health and mobility.
FlexibilityBlood Pressure Monitor
An automatic or manual sphygmomanometer used to measure resting blood pressure, a key cardiovascular health marker.
Cardiovascular FunctionPulse Oximeter / Heart Rate Monitor
Measures resting heart rate and blood oxygen saturation, supporting cardiovascular and autonomic nervous system evaluation.
Heart Rate & SpO2Peak Flow Meter
A handheld device used to measure how forcefully a client can exhale, assessing lung function and respiratory health.
Lung FunctionStopwatch / Timer
Used for timed functional tests such as balance holds, reaction time assessments, and other timed physical evaluations.
Functional TimingYMCA Step Test Bench
A 12-inch (30.5 cm) step bench used to administer the YMCA 3-minute step test, assessing cardiovascular fitness via post-exercise heart rate recovery.
Cardiovascular FitnessBIA Scale (Visceral Fat, Skeletal Muscle, Body Fat)
A bioelectrical impedance analysis device (e.g. InBody, Tanita) used to estimate visceral fat level, skeletal muscle mass, and body fat percentage in a single reading.
Body CompositionChest Strap Heart Rate Monitor
Worn during testing to capture continuous, accurate heart rate data for cardiovascular markers, including step test recovery and resting heart rate variability.
Heart Rate & Cardio MarkersBalance Testing Mat or Marked Floor Area
A stable, clearly marked surface used to conduct single-leg stance and other balance assessments.
BalanceVision Testing Chart (Contrast Sensitivity)
A standardized chart used to assess visual contrast sensitivity, an early indicator of visual and neurological ageing.
Sensory Function