// KNOWLEDGE_BASE

HEALTH & LONGEVITY GLOSSARY

Evidence-based definitions for fitness metrics, biomarkers, and training concepts.

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Longevity & Aging

1 terms

Cells that have stopped dividing but remain metabolically active, secreting inflammatory factors that contribute to aging.

2 terms

The percentage of time spent actually sleeping versus total time in bed, a key indicator of sleep quality.

The time it takes to transition from full wakefulness to sleep after getting into bed with the intention to sleep.

2 terms

A measure of how well sleep restores and recovers the body, beyond simple sleep duration.

The training principle where fitness improves above baseline during recovery from training stress.

1 terms

The amount of blood pumped by the left ventricle with each heartbeat.