Characteristics of altitude ranges71
| Altitude | Definition |
|---|---|
| 0–500 m | ‘Near sea level’ |
| Above 500–2000 m | ‘Low altitude’: minor impairment of aerobic performance becomes detectable |
| Above 2000–3000 m | ‘Moderate altitude’: mountain sickness starts to occur and acclimatisation is increasingly important for performance |
| Above 3000–5500 m | ‘High altitude’: mountain sickness and acclimatisation become clinically relevant; performance is considerably impaired |
| Above 5500 m | ‘Extreme altitude’: prolonged exposure leads to progressive clinical deterioration |