It is a prompt, not a diagnosis
Responses highlight topics across the four frontiers.
Bodybuilding, nutrition & longevity
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The 2-minute check
Ten questions on energy, recovery, strength, sleep and measurement.
An illustrative score highlights topics to discuss; it does not measure fitness or health.
01 / 10
Answer for your current routine. Nothing is stored or sent.
Your result
…
Choose one topic and bring an example from your current routine to the free call. The conversation can clarify whether coaching, assessment or clinical advice is the appropriate next step.
A self-assessment, not a diagnostic tool, and no substitute for a conversation with your doctor.
After the check
Responses highlight topics across the four frontiers.
Laboratory tests are billed at cost and interpreted by your physician. The full assessment measures VO₂max, lean mass, ApoB, HRV, sleep efficiency and eccentric strength.
No email, no cookie, no list. The score is calculated in your browser and gone when you close the tab.
Discuss your score
Use the free call to discuss your goals and whether an assessment is appropriate.
Related references
Acute:chronic workload ratio (ACWR)
Recent training load divided by a longer-term average. A monitoring input, not an individual injury forecast.
Read the glossaryApoB
Apolipoprotein B: a count of the particles that carry cholesterol into the artery wall; referred when out of range.
Read the glossaryDXA
Dual-energy X-ray absorptiometry: a scan estimating lean mass, fat mass and bone mineral density.
Read the glossaryForce–velocity profile
The relationship between force and movement speed, used to inform strength and power programming.
Read the glossaryFour frontiers
The four areas the longevity work follows: Heart & circulation; Strength & structure; Metabolism & blood; Sleep, stress & mind. Measured once a year, watched all year.
Read the glossaryHRV
Heart-rate variability: beat-to-beat variation in heart rhythm, read each morning as a trend against your own baseline; an input to the readiness score.
Read the glossaryLimiter
A priority identified from the assessment that guides the next training block.
Read the glossaryPerformance Twin
Sainath’s model of your measurements and training history, used to support coaching decisions and explain their inputs.
Read the glossaryReadiness score
One number each morning from HRV, sleep, yesterday’s load and their trend: push, maintain or repair, with the reason stated.
Read the glossaryRe-test
The same battery twelve weeks later under the same conditions, read side by side.
Read the glossaryS0 (non-approved substances)
The first section of WADA’s Prohibited List: any pharmacological substance with no current approval from a government health authority for human use is prohibited at all times, named or not.
Read the glossaryM1 (manipulation of blood and blood components)
The section of WADA’s Prohibited List covering blood doping: transfusions, red-blood-cell products and artificially raising oxygen uptake, transport or delivery.
Read the glossarySix pillars
The performance half of the assessment: Speed; Strength & power; Endurance; Body composition; Recovery; Mobility & resilience. Each measured and trainable; any one can be the limiter.
Read the glossaryVO₂max
The highest rate of oxygen use measured during a graded exercise test; one measure of cardiorespiratory fitness.
Read the glossaryRepetitions in reserve (RIR)
How many more repetitions were possible when a set stopped; most sets here finish one to three short of failure.
Read the glossaryTherapeutic use exemption (TUE)
Permission from the relevant anti-doping organisation to use a prohibited medicine for a documented medical condition, under its criteria.
Read the glossaryStrict liability
An athlete is responsible for prohibited substances found in their sample, regardless of intent. Supplement certification cannot remove all contamination risk.
Read the glossaryEnergy availability
The energy left for normal function after training: intake minus exercise expenditure, per kilogram of lean mass. Too low for too long costs hormones, bone, immunity and performance.
Read the glossaryMinimal detectable change
A threshold used to distinguish measured change from expected measurement error.
Read the glossaryMonitoring Program (WADA)
Substances WADA watches without prohibiting them: caffeine in competition and the GLP-1 medicines semaglutide and tirzepatide, among others. Monitored is not banned.
Read the glossaryVelocity-based training
Setting strength work by bar speed rather than a fixed percentage of a one-repetition maximum; a set ends when speed drops by an agreed amount.
Read the glossary