Metrics & methodology
How Ergon computes zones, training load, and the rest of its numbers.
Ergon shows its work. These articles explain how the numbers are computed — what anchors them, what the edge cases are, and where the honest limits sit.
- Training load — How Load is computed, which signal drives it, and where it stops being precise.
- Training zones — How heart-rate and power zones are derived, and how to customize them.
Reviewed July 2026 · Questions? support@ergon.training