Respiratory

The respiratory system moves air and exchanges oxygen and carbon dioxide between the lungs and blood. Lung and cardiorespiratory function are strong markers of overall fitness and longevity.

Respiratory health determines exercise capacity and is closely tied to cardiovascular fitness (VO₂ max), one of the strongest predictors of longevity. Not smoking is the single most important protective step.

1. 1

   FoundationExerciseThe cornerstone hub on how activity improves nearly every health outcome.
2. 2

   ConditionRespiratory InfectionsColds and flu — and the antibiotics that do nothing for either
3. 3

   BiomarkerBlood Eosinophil CountThe test that decides who gets a steroid inhaler
4. 4

   Signal RecordInhaled CorticosteroidsThe preventer inhaler — the one that saves lives, and the one people skip
5. 5

   Body SystemCardiovascular

1. Understand the system
2. Know the key biomarkers
3. Learn the common conditions
4. Apply evidence-based interventions

An orientation to how this topic is typically approached — not medical advice.