Metrics overview

Everything Driftline reads, in one page.

The same physics-based model runs across every sport — only the data going in changes. This is the brief list of metrics that come out the other side.

Foundation · same model, every sport

Three numbers describe any athlete.

Endurance, top end, and heart-rate ceiling are the canonical Driftline triple. Every other metric on this page derives from them plus the athlete's live signal.

Endurance (E)
Sustainable fraction of the athlete's ceiling, 0 to 1. The single number that separates a Sprinter from a Diesel.
Vmax / Pmax
True top speed or top power, extracted from submaximal efforts — no all-out test required.
HR Max
Heart-rate ceiling, extracted submaximally the same way.
Confidence
Model certainty, weighted across every prior session for the same athlete.

Running

Race predictions, training zones, drift.

Time Machine
Predicted race times at any distance — 1 km to ultra — refreshed every session.
Pace + HR zones
Five training zones anchored to the athlete's own physiology, not population averages.
Aerobic & lactate thresholds
Pace and HR at the aerobic threshold (AeT) and lactate threshold (LT) — the two key training boundaries.
Aerobic / glycolytic split
Second-by-second partition of where the energy is coming from — TrueZone's core read.
Effort & HR drift
Fatigue accrual across the run; quantifies how much the athlete is paying for late-session intensity.
VO2max
Estimated from any submaximal session — no treadmill, no max test.

Cycling

Power profile without the 20-minute test.

FTP / Pmax
Functional threshold and peak power, extracted submaximally — no all-out efforts needed.
Power-duration curve
Sustainable watts at any duration, from a 5-second sprint to a four-hour ride.
Power + HR zones
Seven training zones anchored to the rider's own physiology.
Aerobic & lactate thresholds
Watts and HR at the aerobic threshold (AeT) and lactate threshold (LT). LT lands at the FTP-equivalent.
Aerobic / glycolytic split
The same metabolic partition the running model produces, applied to power.
Effort & drift
Cardiovascular drift across a ride — fatigue, pacing quality, and recovery between intervals.

Football & team sports

Live match-day physiology, no strap required.

On top of the team-sports-specific outputs below, every metric from the Running section is also produced for football players — Time Machine predictions, training zones, thresholds, and drift all derive from the same per-player fit.

Per-player profile
E, Vmax, and HRmax fit from a single training session — valid for every match the player runs after.
Live HR (no strap)
Heart rate during matches, predicted from GPS speed alone using the player's training-fit profile.
Runway
Projected match-pace minutes remaining — the player's physiological budget in real time.
Freshness %
Real-time fuel-tank level, expressed as a single percentage for broadcast and bench.
HSR & Sprint reserves
Projected continuous high-speed-running and sprint time left in the tank.
Player-specific zones
FIFA Z4 / Z5 thresholds shift with each athlete — 23 km/h is comfortable for one player, near-max for another.
Archetype
Sprinter, Diesel, Balanced, or Battery — placed on the quadrant from two numbers.

Walking & metabolic health

The same model, scaled to everyday movement.

Metabolic load
True energetic cost of walking, derived from speed and the walker's own E.
VO2max
Estimated from a single brisk walk — no treadmill, no max test.
Aerobic / glycolytic split
Daily activity read through the same metabolic lens we use for elite athletes.
Recovery quality
Autonomic recovery score from rest periods and low-intensity activity.
Daily aerobic stimulus
Whole-day metabolic load — how much real aerobic work the body actually did across waking hours.

f(E, V, P) → every metric

See it running on real data.

Our football showcase walks through the full stack end to end — a training-session HR fit, then match-day Freshness and Runway from GPS alone.

Football showcaseValidation