HYBRA — Hybrid Athlete Performance Index: Score your strength, endurance and athleticism

DEFINED BY PERFORMANCE AND MATH.
ARE YOU A REAL HYBRID?
CALCULATE YOUR SCORE
↓ ENTER THE SYSTEM

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NUMBERS

How Partial Scores Work
01 Blank fields are excluded, not zeroed — skipping a lift doesn't punish your score. A partial entry is a valid score with full tier, pillars, and radar.
02 You'll also see a Ceiling Score — your projected score across all 19 exercises. The fewer you've logged, the more it shows you what's possible if your missing events matched your current level. For more details click here.
ATHLETE PROFILE
Name, sex, age, height, weight
GYM
5 exercises · Deadlift, Squat, Bench, Row, Press
5 exercises
Enter your 1-Rep Maximum (1RM) for each lift — the heaviest single rep you can complete with good form.
ATHLETICS
7 exercises · Jumps, Sprint, Pull-ups, Push-ups, Dips, L-Sit
7 exercises
For bodyweight exercises, enter your maximum reps (unbroken set, strict form). For jumps & sprint, enter your best single attempt.
Power & Explosiveness
Bodyweight Strength
ENDURANCE
7 exercises · 1K–Half Marathon runs, 100m–1500m swims
7 exercises
Running
Swimming

One number from 0–100. Strength, power, endurance — each pillar scored against the same standard, adjusted for bodyweight and age. A 65 kg runner and a 95 kg powerlifter land on the same scale. Every formula is documented below, nothing omitted.

WHY BODYWEIGHT IS IN EVERY FORMULA

A 100 kg athlete who deadlifts 200 kg has lifted 2× bodyweight. A 60 kg athlete who deadlifts 180 kg has lifted 3×. Relatively, the 60 kg athlete is stronger. A raw leaderboard rewards mass, not output. Hybra corrects for that.

Every formula divides your raw number by a bodyweight factor before scoring. This is allometric scaling — the same method used by Concept2 rowing rankings and World Masters Athletics. The mathematics of fair comparison.

HOW THE THREE PILLARS COMBINE
Apex Score = ( Gym Pillar + Athletics Pillar + Endurance Pillar ) ÷ 3

Each pillar is the average of its scored exercises, multiplied by a coverage factor (0.90–1.00). Logging all exercises in a pillar gives full value. Logging just one gives 90% — a small discount that discourages cherry-picking your single best lift.

Athletics uses count-weighted sub-pillars. Power and Bodyweight Strength are averaged by how many exercises you logged in each — not a flat 50/50. Log 3 power exercises and 1 bodyweight: power carries 3× the weight in the sub-pillar average.

All three pillars are required for a ranked tier. A partial profile (missing one or more pillars) is scored but capped at Baseline — HYBRA is a hybrid system and tiers reflect hybrid output. Individual scores are capped at 100 before any averaging. The Confidence indicator reflects how many of 19 exercises are documented.

Age is applied with three separate tracks. Strength and bodyweight exercises, explosive power (sprint/jumps), and endurance each follow a different physiological decline curve. A 50-year-old powerlifter and a 50-year-old sprinter age differently — the system reflects that. Full tables are in the Adjustments tab.

Score 100 = 90th percentile of specialist competitors per domain (~99th percentile of hybrid athletes). Score 50 = 50th percentile of competitive recreational hybrid athletes with 18+ months of structured training. The standard is calibrated, not arbitrary.
WHERE YOU STAND
World Class
~0%
Elite
~0%
Advanced
~0%
Intermediate
~0%
Novice
~0%
Baseline
~0%

Distribution among competitive recreational hybrid athletes (18+ months structured training). The untrained adult population sits below Novice — most people score below 30.

WHAT WORLD CLASS LOOKS LIKE

Two athletes whose publicly documented competition results place them in estimated World Class range. Neither has completed all 19 exercises within this system — these are estimates derived from competition records only.

Men · Estimated ~90–93
Mat Fraser
5× CrossFit Games Champion (2016–2020) · 88 kg · 170 cm
Deadlift~220 kg
Pull-ups30+ reps
5K Run~17:00
~91HYBRA EST.
Estimated from public competition records · Mat Fraser
Women · Estimated ~88–92
Tia-Clair Toomey
6× CrossFit Games Champion (2017–2022) · 58 kg · 158 cm
Deadlift~142 kg
Pull-ups15+ reps
5K Run~18:30
~90HYBRA EST.
Estimated from public competition records · Tia-Clair Toomey

Estimates only. A full Hybra Score requires all 19 exercises logged within the system.

DATA SOURCES
58,154
Drug-tested raw powerlifters. Sets Legendary constants for all 5 Gym exercises at the 90th percentile of specialists.
175,000+
Pro division race results worldwide. Validates all running and swim Endurance constants — 5K anchor at 16:00 for men.
Games Level
Pull-up, push-up, and bodyweight constants derived from Games-level functional fitness standards.
Normative
Broad jump and sprint constants from NFL Combine data. Age factors from World Masters Athletics official tables.
Pillar 1 · 5 exercises
Gym
Deadlift · Squat · Bench Press · Barbell Row · Military Press
THE DSS MODEL

DSS = Derivative Strength-Scaling. An exponential curve mapping how lifting ability grows with bodyweight. The key insight: bigger athletes don't get proportionally stronger — a person twice as heavy can't lift twice as much. Inspired by IPF formula research, independently calibrated to hybrid athletes.

FORMULA
Step 1 — Bodyweight-adjusted coefficient
GL_Coef = Load_kg ÷ ( A − B × exp(−k × BW_kg) )
Load_kg
The weight you lifted. E.g. 180 kg deadlift → Load_kg = 180.
BW_kg
Your bodyweight in kg — the variable that makes comparison fair.
A
Theoretical max lift at infinite bodyweight (the asymptote). Men: 1199.7 kg · Women: 610.3 kg. Derived from real competition data.
B
Drop-off factor — how much weaker a very light athlete is vs a heavy one. Men: 1025.18 · Women: 1045.59.
k
Steepness of the bodyweight curve. Men: 0.00921 · Women: 0.03048. Higher k = bodyweight matters more. Women's is higher because female strength scales more steeply in competition data.
GL_Coef
The result: your bodyweight-adjusted strength number. Two athletes with the same GL_Coef are equally strong relative to their body.
Step 2 — Score against the Legendary level
Score = ( GL_Coef ÷ Legendary_Const ) × 100
Why the 90th percentile? Powerlifters specialise exclusively in lifting. A hybrid athlete who also trains endurance and power cannot reasonably match the top 1% of pure lifters. The Legendary threshold is set at the 90th percentile of powerlifters — equivalent to approximately the 99th percentile of hybrid athletes.
LEGENDARY CONSTANTS

Source: 58,154 drug-tested raw powerlifters, OpenPowerlifting 2025.

ExerciseMenWomenScores 100 when…
Deadlift0.3990.398Men: 288 kg at 83 kg BW · Women: 182 kg at 63 kg BW
Squat0.3670.354Men: 265 kg at 83 kg BW
Bench Press0.2350.197Men: 170 kg at 83 kg BW
Barbell Row0.3120.311Est. 78% of deadlift constant — pending direct data
Military Press0.1580.131Est. 67% of bench constant — pending direct data
WORKED EXAMPLE
Men's Deadlift · 80 kg athlete · 200 kg lift
1
Denominator: 1199.728 − 1025.182 × exp(−0.00921 × 80)
= 1199.728 − 1025.182 × 0.4788 = 708.83
708.83
2
GL_Coef: 200 ÷ 708.83
0.2822
3
Score: (0.2822 ÷ 0.399) × 100
70.7
200 kg deadlift at 80 kg BW = 70.7 — solidly Advanced.
70.7

Gym Pillar Score = average of logged gym exercises × coverage factor (0.90 at 1 exercise, 1.00 at all 5).

Pillar 2 · 7 exercises · 2 sub-pillars
Athletics
Power: Broad Jump · Box Jump · 100m Sprint  ·  Bodyweight: Pull-ups · Push-ups · Dips · L-Sit

Two separate sub-pillars, combined by count-weighted average. Power & Explosiveness (jumps, sprint) and Bodyweight Strength (pull-ups, push-ups, dips, L-sit) are scored independently. Each sub-pillar is weighted by the number of exercises logged in it — a specialist strong in one and weak in the other cannot inflate the combined score.

Athletics Pillar = ( Power × n_power + BW Strength × n_bwstr ) ÷ ( n_power + n_bwstr )
SUB-PILLAR 1 — BODYWEIGHT STRENGTH
Rep-based (pull-ups, push-ups, dips)
Score = ( Reps ÷ BW_kg^0.67 ) ÷ Legendary_Const × 100
BW_kg^0.67
Bodyweight to the power of 0.67. At 80 kg → ≈19.9. Why 0.67? A.V. Hill (1950): muscle force scales with cross-sectional area, which scales at roughly mass^0.67. A heavier athlete gets credit for extra muscle — but not fully, because they're also lifting that extra mass.
Reps ÷ BW^0.67
Your rep-adjusted coefficient. Same value = equally capable relative to body size regardless of weight.
L-Sit hold (time-based)
Score = ( Seconds ÷ BW_kg^0.50 ) ÷ Legendary_Const × 100

Uses BW^0.50 — a middle-ground exponent — because a static hold requires active force production against gravity, scaling closer to strength (BW^0.67) than pure geometry (BW^0.33).

SUB-PILLAR 2 — POWER & EXPLOSIVENESS
Jumps (broad jump, box jump)
Score = ( Distance_cm ÷ BW_kg^0.33 ) ÷ Legendary_Const × 100

Broad jump uses BW^0.33 — projectile physics, where mass meaningfully affects horizontal distance. Box jump uses BW^0.20 — height is less mass-dependent; larger athletes can produce more absolute force, so the body weight penalty is smaller.

100m sprint (lower time = better)
Score = Legendary_Const ÷ ( Time_sec × BW_kg^0.111 ) × 100

Smallest exponent in the system: 0.111. Sprint speed has the weakest link to bodyweight of any exercise. The formula is also inverted — lower time sits in the denominator so faster athletes score higher.

LEGENDARY CONSTANTS
ExerciseMenWomenScores 100 when…
Pull-ups1.4860.915Men: 28 reps at 80 kg · Women: 15 reps at 65 kg
Push-ups3.1852.120Men: 60 reps at 80 kg
Dips2.6541.800Men: 50 reps at 80 kg
L-Sit Hold6.716.08Men: 60 sec at 80 kg · Women: 49 sec at 65 kg
Broad Jump65.9456.26Men: 280 cm at 80 kg (NFL Combine 95th pct)
Box Jump33.328.2Men: 80 cm at 80 kg · Women: 65 cm at 65 kg
100m Sprint18.2220.38Men: 11.2 sec at 80 kg · Women: 12.3 sec at 65 kg

Sources: CrossFit Games competitor data · NFL Combine normative data · calisthenics competition standards.

WORKED EXAMPLE
Men's Pull-ups · 80 kg athlete · 15 reps
1
BW^0.67: 80^0.67
= e^(0.67 × ln 80) = e^2.936
18.86
2
Coefficient: 15 ÷ 18.86
0.7952
3
Score: (0.7952 ÷ 1.486) × 100
53.5
15 pull-ups at 80 kg = 53.5 — comfortably Intermediate.
53.5
Pillar 3 · 7 exercises
Endurance
1K · 5K · 10K · Half Marathon  ·  100m · 500m · 1500m Swim
KLEIBER'S LAW
Kleiber's Law (1932): metabolic rate scales with mass^0.75. Di Prampero (1986) applied this to locomotion — the energy cost of running scales at approximately mass^0.222. Concept2 uses this same exponent for their bodyweight-adjusted rowing rankings. It is among the most validated adjustments in endurance sport.
FORMULA
RUNNING (1K · 5K · 10K · HALF MARATHON)
Score = Legendary_Const ÷ ( Time_sec × BW_kg^0.222 ) × 100
Time_sec
Your time in seconds. A 22:00 5K = 22 × 60 = 1320 seconds.
BW_kg^0.222
At 80 kg → ≈2.77. Running penalises body weight significantly — every extra kg must be propelled over ground. Di Prampero (1986): energy cost of running scales at mass^0.222.
Inverted
Lower time = better, so time sits in the denominator. Faster → smaller denominator → higher score.
SWIMMING (100m · 500m · 1500m)
Score = Legendary_Const ÷ ( Time_sec × BW_kg^0.111 ) × 100
BW_kg^0.111
At 80 kg → ≈1.63. Buoyancy partially offsets body mass in water — heavier athletes are not penalised as much as in running. The exponent is halved (0.222 → 0.111) to reflect this.
LEGENDARY CONSTANTS

Source: HYROX Pro division global race data (175,000+ athletes). All times at 80 kg (men) / 65 kg (women) reference.

RUNNING
EventMen (s)Women (s)Scores 100 when…
1K Run477531Men: 3:00 · Women: 3:30
5K Run25232604Men: 15:54 · Women: 17:11
10K Run52205390Men: 32:53 · Women: 35:34
Half Marathon1144011800Men: 1:12:05 · Women: 1:17:51
SWIMMING — uses BW^0.111
EventMen (s)Women (s)Scores 100 when…
100m Swim125141Men: 1:17 · Women: 1:29
500m Swim689774Men: 7:04 · Women: 8:07
1500m Swim18111894Men: 18:33 · Women: 19:52
WORKED EXAMPLE
Men's 5K Run · 80 kg athlete · 22:00
1
Convert: 22:00 = 22 × 60
1320 s
2
BW^0.222: 80^0.222
2.77
3
Denominator: 1320 × 2.77
3656.4
4
Score: 2523 ÷ 3656.4 × 100
69.0
22:00 5K at 80 kg = 69.0 — lower Intermediate, just below Advanced.
69.0
AGE FACTOR — THREE SEPARATE TRACKS

Different physiological systems age at different rates. A single age multiplier applied to all exercises is a scientific compromise — HYBRA uses three distinct tracks derived from WMA 2023 age grading data and published sports science.

STRENGTH — Gym lifts + Bodyweight exercises

Based on Masters powerlifting relative strength norms (809,986 competition entries, PubMed 2024). Peaks age 32–34. Moderate decline — technique and neural efficiency partly offset hormonal losses.

AgeMultiplier
≤ 34× 1.000
35–39× 0.974
40–44× 0.942
45–49× 0.902
50–54× 0.854
55–59× 0.797
60+× 0.730
POWER — 100m Sprint + Jumps

Fastest-declining track. Neuromuscular power peaks ~age 25 and drops steeply. Based on WMA 2023 sprint/jump factors and Pickering, Hicks & Kiely (2021) — Why Are Masters Sprinters Slower?

AgeMultiplier
≤ 28× 1.000
29–33× 0.970
34–38× 0.930
39–43× 0.882
44–48× 0.825
49–53× 0.757
54–58× 0.680
59+× 0.600
ENDURANCE — Running + Swimming

Based on WMA 2023 distance running factors. VO₂max declines ~1%/year from age 30–35. Economy losses add slightly more from age 50+.

AgeMultiplier
≤ 32× 1.000
33–37× 0.978
38–42× 0.950
43–47× 0.912
48–52× 0.865
53–57× 0.808
58+× 0.740
HEIGHT FACTOR — GYM ONLY

Range of motion is shorter for smaller athletes in barbell lifts. This confers a mechanical advantage. The correction is minor, capped at ±0.06, and applied only to the Gym pillar. It is not a meaningful enough factor to influence tier placement.

ConditionAdjustment
Per 10 cm from sex average (M: 175 cm, W: 162 cm)±0.02 — capped at ±0.06 total
Man at 195 cm−0.04 · penalty for range of motion advantage
Man at 165 cm+0.02 · bonus for mechanical disadvantage
ESTIMATED VO₂ MAX

When you log a run time, HYBRA displays an estimated VO₂ max using the Daniels-Gilbert formula (1979), one of the most validated performance-to-aerobic-capacity models in exercise science. This is a "functional VO₂ max" — it captures both aerobic capacity and running economy, unlike lab testing which measures oxygen uptake alone. Source: Daniels & Gilbert, Oxygen Power (1979). Formula: best available run (5K or 10K preferred).

VDOT = ( −4.60 + 0.182258×V + 0.000104×V² ) ÷ ( 0.8 + 0.1894393×e^(−0.012778×T) + 0.2989558×e^(−0.1932605×T) )

Where V = velocity in m/min, T = time in minutes. This is a display-only metric — it does not affect your HYBRA score. It is shown because a 16:00/5K athlete and an 18:30/5K athlete scoring the same HYBRA endurance sub-score might have meaningfully different aerobic ceilings.

BODY FAT % (OPTIONAL INPUT)

Entering your body fat % enables display of your Lean Body Mass (LBM) alongside your VO₂ max. LBM is shown as informational context — it does not currently modify your HYBRA score. Why not? The legendary constants were calibrated against total bodyweight competition data. Substituting LBM without recalibrating those constants would introduce systematic error. LBM-adjusted scoring is planned for a future update when sufficient body-composition-linked performance data is available.

HYBRA SCORE · CONFIRMED
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SIX TIERS.
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Your score places you in one of six tiers. Tiers are gates, not labels — each demands minimum output across all three pillars. A 95 kg lifter with no running score cannot hold Elite. The standard is fixed. Either you meet it or you don't.

Click any tier row → see exact benchmarks at your bodyweight
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HYBRA · TIER REFERENCE PROFILE
TIER
HYBRA SCORE
Pillar Scores
GYM
ATHLETICS
ENDURANCE
What this tier looks like
Ceiling Score

Your Ceiling Score is the answer to: "What would I score if I logged every exercise — and performed at the same relative level I already show?"

How it is calculated
01 Your logged exercises reveal your allometric coefficient — a bodyweight-adjusted efficiency number unique to you.
02 Each unlogged exercise in the same movement group is projected using that coefficient — applied against its own benchmark constant.
03 All projected + actual scores are averaged into a final ceiling. Because each exercise has a different benchmark, the projected scores land above or below your current average — never exactly the same.
Example

You deadlift at a coefficient of 0.32. Military press has a much smaller benchmark constant, so the same coefficient projects a higher score on press. That pulls your ceiling above your current score even if you have never touched a barbell overhead.

When all 19 exercises are logged, the ceiling equals your score — there is nothing left to estimate.
Est. VO₂ Max

Your VO₂ Max is a measure of your maximal aerobic capacity — how much oxygen your body can use per minute per kilogram of bodyweight. It is the gold standard for endurance fitness and a strong predictor of cardiovascular health.

How it is estimated
01 Your best available run time (5K or 10K preferred; 1K or half marathon as fallback) is fed into the Daniels-Gilbert VDOT formula.
02 The formula models the relationship between race pace and oxygen consumption. It returns a VO₂ max estimate validated against laboratory measurements across thousands of runners.
03 The classification (Good, Excellent, Superior…) uses ACSM norms (Åstrand & Rodahl) stratified by sex — the same reference used in clinical exercise testing.
Classification (Men)
Superior≥ 60 ml/kg/min Excellent52 – 59 Good43 – 51 Fair34 – 42 Low< 34
This is a validated estimate, not a lab result. A proper VO₂ max test requires a metabolic cart. Use this as a reliable training signal, not a clinical measurement.