How MyThreshold's numbers work
Every number MyThreshold shows you comes from a published, checkable formula — never a vague impression. Pick a family below to see the plain-English meaning, a worked example with real numbers, and the exact formula, provenance, and citation behind it.
Fitness & fatigue
3 metricsCTL/ATL/TSB, ACWR, and 80/20 polarization — the Banister/Coggan load model your plan adjusts from.
Competitive load
3 metricsPower/run/HR/subjective TSS, TRIMP, and WHO intensity minutes — the paywalled load numbers, reimplemented from the published formulas.
Performance thresholds
3 metricsCP/W’, FTP, critical speed/D’, and VDOT — the modeled anchors fit from your own recorded best efforts.
Aerobic efficiency
2 metricsEfficiency Factor and aerobic decoupling — how much output your heart rate is buying you, and whether that holds up over an effort.
Race prediction
3 metricsTwo INDEPENDENT published race-time models over one best effort, plus the honest spread between them — never a single black-box number.
What-if fitness projection
1 metricForward-project CTL/ATL/TSB from a planned future training schedule — the same EWMA recursion, run forward instead of backward.
Recovery & readiness
3 metricsMyThreshold’s readiness composite, Garmin’s ingested readiness score, and rolling HRV status — surfaced side by side, never conflated.
Performance curves
2 metricsMean-maximal power/speed curves and best-effort splits — real observed peaks from your own recorded data, the same numbers Strava/Garmin paywall.