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The 360° metabolic profile

A test gives you numbers.
INSCYD gives you a 360° profile you can read, interact with and customize.

One test opens the whole athlete: every physiological benchmark ranked against a peer group you choose, every metric plotted across the full intensity range, and every change tracked from one test to the next. Explore it on screen, configure it for your sport, and hand your athlete something they actually understand.

Book a demoSee what is inside
Metabolic fingerprint
VO₂max Threshold FatMax Economy Body comp VLamax
Limiter · VLamax
Body composition
Fat versus fat-free mass
Body Mass71.4 kg
Body Height181.0 cm
Body Mass Index21.8 kg/m²
Projected BSA1.912 m²
Body Fat8.0 % · 5.7 kg
Fat Free92.0 % · 65.7 kg
Marco Rossimale Test ID#88214 DateMar 12, 2026 TypeLactate SportTriathlon · Cycling ⇆ Change Test
VO₂max
60.2ml/min/kg
VLamax
0.52mmol/l/s
FatMax
355kcal/h
CarbMax
187g/h
Glycogen
486g
LT1
196W
Anaerobic threshold
281W
Economy
12.8ml/min/W
Fat & carbohydrate combustionfatFatMax zonecarbohydrate
watt
Power: 232 wattfat: 355.0 kcal/hcarbohydrate: 289.4 kcal/h
Lactate: recovery & accumulationlactate recoveryla-accumulation
watt
Power: 454 wattlactate recovery: 0.00 mmol/l/minla-accumulation: 8.3 mmol/l/min
Physiology-based training zones
Zone Target Physiological Conditions
ATEnergy aerobicEnergy anaerobic
Fat oxidation 186 AT66[%] aerobic98[%] anaerobic2[%]
Tempo 226 AT80[%] aerobic95[%] anaerobic5[%]
Anaerobic Threshold 281 — aerobic92.1[%] anaerobic7.9[%]
25% Anaerobic 3' 318 AT113[%] aerobic75[%] anaerobic25[%]
25% Anaerobic 90" 352 AT125[%] aerobic68[%] anaerobic32[%]
25% Anaerobic SS 391 AT139[%] aerobic61[%] anaerobic39[%]

Trusted by the best in sport, and far beyond it

From Olympic federations and WorldTour teams to remote coaches, HYROX studios, longevity clinics and human performance labs worldwide.

So what does a metabolic profile actually look like?

Think about a digital twin of the physiology of your athlete! All physiological performance relevant metrics in one place: from body composition to maximum capacity of each bioenergetic system, from steady state characteristics to training zones which can mimic specific effort duration or training distances.

app.inscyd.com · Tests · Analyze
non H2O30 %H2O18 %passive lactate23 %active muscle28 %body fat8 %
Fat 8%Fat free 92%Fat 8%Fat free 92%
Body Mass71.4 kg
Body Height181.0 cm
Body Mass Index21.8 kg/m²
Projected BSA1.912 m²
Body Fat8.0 % · 5.7 kg
Fat Free92.0 % · 65.7 kg
Metabolic Fingerprint
VO₂maxAnaerobicthresholdVLamaxFatMaxCarbMaxLT1AvailableglycogenEconomyVO₂maxAnaerobicthresholdVLamaxFatMaxCarbMaxLT1AvailableglycogenEconomy
from 14-10-2025 to 12-03-2026VO2max (Relative)Anaerobic Threshold (MLSS)VLamax57585960ml/min/kg260270280watt0.520.540.560.580.60mmol/l/s14-10-202509-12-202527-01-202612-03-2026from 14-10-2025 to 12-03-2026VO2max (Relative)Anaerobic Threshold (MLSS)VLamax57585960ml/min/kg260270280watt0.520.540.560.580.60mmol/l/s14-10-202509-12-202527-01-202612-03-2026
VO₂max

Absolute : 4298 ml/min

Relative : 60.2 ml/min/kg

VLamax

VLamax : 0.52 mmol/l/s

Anaerobic Threshold (MLSS)

Absolute : 281 watt

Relative : 3.94 watt/kg

Fatmax

MFO Absolute : 355 kcal/h

MFO Relative : 4.97 kcal/h/kg

Carbmax

Carbmax : 187 g/h

LT1

Absolute : 196 watt

Relative : 2.75 watt/kg

Available Glycogen

Absolute : 486 g

Relative : 6.81 g/kg

Economy

Economy : 12.8 ml/min/W

VLamaxVO2maxAnaerobic Threshold (MLSS)FatmaxCarbmaxLT1
Metabolic demand & VO₂
oxygen uptake (VO₂)oxygen demand
30456075902002.802503.503004.203504.904005.60ml/min/kgwattwatt/kg

Power: 340 watt   demand: 68.86 ml/min/kg, VO₂ uptake: 53.37 ml/min/kg

Lactate: recovery & accumulation
lactate recoveryla-accumulation
00.511.521502.102002.802503.503004.20mmol/l/minwattwatt/kg

Power: 320 watt   recovery: 0 mmol/l/min, accumulation: 0.92 mmol/l/min

Clone and Edit
ZoneLowerTargetUpperPhysiological Conditions
Recovery120watt136watt148wattTotal energy526kcal/hFat75%Carbohydrates31g/h
Base177watt190watt202wattTotal energy728kcal/hFat63%Carbohydrates64g/h
Medio225watt239watt253wattVO₂max74%Carbohydrates128g/hAnaerobic threshold85%
FatMax172watt185watt198wattTotal energy710kcal/hFat65%Carbohydrates60g/h
Anaerobic Threshold262watt281watt301wattVO₂max82%Carbohydrates233g/hAnaerobic threshold100%

Every metric ranked against comparison data of your choice

Each physiological performance benchmark is ranked against a comparison value. This allows you to immediately interpret the value at one glance to understand which metric offers potential room for improvement.

INSCYD comes with three built in, sport and gender specific comparison groups: recreational, amateur and professional. You can add up to six categories of your own, built around age, event or training level, goals, race demand – whatever your need is.

Three categories out of the boxUp to six categories of your ownMale and female ranges per sport
Same athlete. Same numbers. Different question.
VO₂max60.2ml/min/kg 
Anaerobic threshold281W 
VLamax0.52mmol/l/s 
FatMax355kcal/h 
CarbMax187g/h 
LT1196W 
Available glycogen486g 
Economy12.8ml/min/W 

The strength and limitations profile

Every key performance metric can be ranked to comparison data and visualized in the metabolic fingerprint of the athlete.

This chart allows you to understand at one glance which areas allow room for improvement and should be tackled by specific training interventions.

Metabolic Fingerprint

The metabolic fingerprint compares physiological benchmarks with a chosen comparison group.

Metabolic Fingerprint
VO₂maxAnaerobicthresholdVLamaxFatMaxCarbMaxLT1AvailableglycogenEconomy
Customize Metabolic Fingerprint
AthleteMarco RossiAthlete comparison group

Choose which datapoints appear on the graph.

Muscular Energy Metabolism in action – steady state curves of key performance metrics

Load characteristics show how each physiological metric behaves as a function of power or speed. From aerobic to glycolytic energy supply, oxygen cost to oxygen uptake, substrate utilization, lactate clearance and accumulation rate… all relevant metrics in one dashboard. We call it the heart and soul of metabolic profiling, because it is the center dashboard because it looks inside the athlete at every intensity.

Zoom and pan in synchronised graphs

All graphs are interactive – you can zoom and move around areas of interest.

Customization

Add up to two x-axes to show different units of interest – such as pace in min:sec/km and km/h in running, min:sec/100m in swimming, or Watt/kg in cycling.

Precision

Hover with the mouse on the graph to see the exact values below the graph.

The dark blue line indicates the total metabolic cost (energy cost) as a function of power or speed.

Instead of expressing it in energy (kcal or kJ), it is shown in oxygen equivalents.

The light blue line represents oxygen uptake (VO2).

The difference between these curves indicates how much energy is covered aerobically, while the gap represents anaerobic contribution.

This graph shows lactate production rate (red curve) and maximum lactate oxidation rate (blue curve) as a function of intensity.

The intersection point marks the maximum lactate steady state (MLSS), where production equals oxidation.

Above MLSS, lactate accumulates continuously as production exceeds oxidation.

Below MLSS, lactate can be reused or fat can be used as fuel.

This graph illustrates the net lactate accumulation rate (purple curve) above MLSS.

The grey curve shows the rate at which accumulated lactate can be cleared or oxidized.

This graph shows fat combustion rate (green curve) and carbohydrate combustion rate (red curve) across exercise intensity.

Values are displayed in kcal/h and additionally carbohydrates in g/h.

The green area highlights maximum fat oxidation (MFO ±5%).

The orange area indicates carbohydrate usage between 60–90 g/h.

This graph shows the fractional contribution of aerobic (blue) and anaerobic (red) metabolism.

It represents steady-state conditions, where anaerobic contribution comes from glycolysis only.

This graph shows the proportion of energy derived from fats (green) and carbohydrates (red).

It illustrates how fuel usage shifts with exercise intensity.

Metabolic demand & VO₂

oxygen uptake (VO₂)oxygen demand

Lactate – production & max. oxidation

la.-productionmax. aerobic la.-comb.

Lactate: recovery & accumulation

lactate recoveryla-accumulation

Fat & carbohydrate combustion

fatFatMax zonecarbohydratemax. carb. intake

% Aerobic & Anaerobic

anaerobicaerobic

% Fat & Carbohydrate

%fatcarbohydrate

Drag a range to zoom. Hover to read the values.

500.701001.402002.803004.204005.605007.006008.406979.76020406080100ml/min/kgwattwatt/kg
500.701001.402002.803004.204005.605007.006008.406979.760123455.5mmol/l/minwattwatt/kg
500.701001.402002.803004.204005.604155.8100.511.522.533.5mmol/l/minwattwatt/kg
520.731001.401502.102002.802503.503004.203384.7303006009001200150001002003001673.04399.77kcal/hg/hwattwatt/kg
500.701001.402002.803004.204005.605007.006008.406979.76020406080100%wattwatt/kg
500.70600.84901.261201.681502.101802.522102.942343.28020406080100%wattwatt/kg

Body composition – the undervalued metric

INSCYD calculates a whole body composition – including water and muscle mass – from the fat measurement only.

Muscle mass is crucial to understand the available glycogen storage.

Water mass is undervalued because it affects the so-called lactate dilution space. Most people are familiar with lactate concentration in mmol per Liter. But without understanding the Liter in the equation this number is hard to interpret correctly. INSCYD solves this and thereby makes interpretation of lactate reading independent of body composition.

Body Composition

Overview of body composition and anthropometric data.

non H2O30 %H2O18 %passive lactate23 %active muscle28 %body fat8 %
Fat 8%Fat free 92%Fat 8%Fat free 92%
Body Mass71.4 kg
Body Height181.0 cm
Body Mass Index21.8 kg/m²
Projected BSA1.912 m²
Body Fat8.0 % · 5.7 kg
Fat Free92.0 % · 65.7 kg

Clarity on the capacity of each system

It can be difficult to really put physiological performance metrics into perspective. VO₂max is measured in ml/min/kg, VLamax in mmol/l/s and MLSS in power – that makes it hard, if not impossible to really compare the values. Also: a VLamax of 0.5 mmol/l/s in an 80kg athlete and in a 60kg athlete can mean something totally different.

INSCYD solves this for you: by converting all metrics to one and the same unit it becomes possible to finally compare all these metrics and clearly see how much stronger – or weaker – the glycolytic system is compared to the aerobic, at which percentage MLSS sits and much more.

Metabolic Power

Relative metabolic performance metrics from body composition data.

VLamaxVO2maxAnaerobic Threshold (MLSS)FatmaxCarbmaxLT1

Make the metrics you improve the metrics you track

Make a list of the physiological factors that actually determine performance: fat oxidation, carbohydrate use, economy, recovery, aerodynamics, and so on. Now make a second list: the metrics you actually track in training. If you can’t directly track the things you’re trying to improve, how do you know whether training is moving them in the right direction?

Beyond a single number

VO₂max, VLamax, FatMax, carbohydrate cost, recovery. Every driver of performance, not just FTP.

See the whole picture

Track multiple metrics on one chart, up to three axes side by side, and spot adaptations a single number misses.

Training block ROI

See exactly what six weeks of work changed, metric by metric.

Progress stories athletes trust

Clear, personalized visuals that show athletes their training paying off, in reports that carry your name.

Your chart, your story

Choose every metric and grouping. Up to three charts per sport, time-scaled or evenly spaced.

Any protocol

Field or lab, power based or lactate based. Same metrics, same chart.

Comparison of metabolic profiles

Compare the Metabolic Fingerprint, the metabolic power and of course the steady state characteristic of different tests. This can be either tests from the same athlete – for example before or after a training block. You can also compare different athletes to each other. Or you can compare the current test result against a virtual future self of the athlete – to quantify what performance becomes possible in the future.

Differences highlighted automatically
app.inscyd.com · Tests · Compare Tests
IDAthleteSportCoachTest TypeTest DateVO₂maxVLamaxWeight
88214Marco RossiCyclingAnna KellerLactateMar 12, 202660.20.5271.4
87102Marco RossiCyclingAnna KellerLactateJan 27, 202657.90.5772.6
Metabolic Fingerprint
Marco Rossi · Mar 12, 2026 · LactateMarco Rossi · Jan 27, 2026 · Lactate
VO₂maxVLamaxAnaerobicThreshold (MLSS)FatMaxCarbmaxLT1

Percentages for both tests use the amateur · Cycling benchmark.

Metabolic Power
Marco Rossi · Mar 12, 2026 · LactateMarco Rossi · Jan 27, 2026 · Lactate
VLamaxVO2maxAnaerobic ThresholdFatMaxCarbmax
Fat & carbohydrate combustion
fatcarbohydratesecond test
02505007501000100200300kcal/hwatt
Every metric that matters

One assessment. The complete picture of your athlete’s physiology.

VO₂max, VLamax, FatMax, thresholds, fuel use and training zones, from a single test in the lab, in the field or fully remote.

Contact usBook a demo