Chapter 25 — Metrics That Matter

Metrics can help or harm. Harmful metrics are vanity metrics: numbers that stroke identity without changing behavior. Useful metrics are behavioral: attendance, sleep, technical focus completion, composure under a known stimulus.

Pick three metrics for twelve weeks: one input (hours slept), one process (sessions completed as planned), one quality (breath steady in a defined drill). Review weekly. If a metric makes you lie, delete it.

Advanced practitioners should watch comparison metrics carefully. Sometimes the best metric is internal consistency: did I keep shape when tired? That does not Instagram well, which is exactly why it is valuable.

◆ ◆ ◆