The exact Coggan band definitions the Hub uses when an athlete is set to the Coggan system.
If you have set an athlete's bike zone system to Coggan 7-zone (see Choosing a bike zone system), this is the band table the Hub renders.
All bands are anchor-relative: percentage of the bike power anchor, which is Critical Power (CP) if a CP test has been logged or FTP otherwise. See Zone anchor methodology.
| Zone | Name | % of anchor | Typical use |
|---|---|---|---|
| Z1 | Active recovery | up to 55% | Easy spinning, post-effort recovery |
| Z2 | Endurance | 56 to 75% | Aerobic base, long rides |
| Z3 | Tempo | 76 to 90% | Sub-threshold endurance, long-course race pace |
| Z4 | Lactate threshold | 91 to 105% | LT / "one hour max" efforts |
| Z5 | VO₂max | 106 to 120% | 3 to 8 minute intervals |
| Z6 | Anaerobic capacity | 121 to 150% | 30 sec to 3 min |
| Z7 | Neuromuscular | above 150% | Sprint, under 30 seconds |
In the Yousuli system the upper bands (5, 6, 7) need W' to place precisely; without W' they show "Need W' data". The Coggan system anchors upper bands to fixed percentages of the anchor, so all seven render whether the athlete has done a CP test or only an FTP test.
The trade-off: Coggan's percent-based upper bands are an approximation that ignores individual W' (anaerobic capacity) variation. Athletes with very high W' or very low W' have upper bands that do not match their actual physiology as well as a W'-anchored model would.
If you want both: run a CP test (so you have W') and the Yousuli system can use it. Or stay on Coggan and accept the approximation.
Picking Coggan does not change underlying physiology or training load:
Only the named band display changes.
A rough translation between the two systems:
| Coggan | Yousuli |
|---|---|
| Z1 Active recovery | Zone 1 Easy / recovery |
| Z2 Endurance (lower) | Zone 2 Endurance |
| Z2 Endurance (upper) and Z3 Tempo (lower) | Zone 3a Mid endurance |
| Z3 Tempo (upper, sweet spot) | Zone 3b Sweet spot |
| Z4 LT | Zone 4 Threshold and Zone 5 Suprathreshold |
| Z5 VO2max | Zone 6 VO2max |
| Z6 + Z7 | Zone 7 Anaerobic |
The boundaries are not identical (the two systems use slightly different percentages) but the conceptual mapping is close enough that experienced coaches can translate prescriptions in their head.
See also: Choosing a bike zone system, Yousuli zones explained.
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