Altitude Training Adaptation Calculator
Altitude training camps stimulate red blood cell production and increase haemoglobin mass, improving oxygen-carrying capacity and sea-level endurance performance. This calculator estimates the expected increase in haemoglobin mass and VO2max following a Live High Train Low camp, based on published exercise physiology research from the Australian Institute of Sport and published meta-analyses.
Altitude adaptation formulas
Effective altitude hours = weeks x days/week x hours/day (if altitude is above 2,000 m)
Hbmass increase (%) = 1.1 x (effective altitude hours / 100)
VO2max increase (%) = Hbmass increase x 0.7 (approx. 70% of Hbmass gain transfers to VO2max)
The 1.1% per 100 altitude-hours estimate is from the meta-analysis by Garvican-Lewis et al. (2016, British Journal of Sports Medicine). The 0.7 transfer coefficient from Hbmass to VO2max is from Wehrlin and Hallen (2006). Increases plateau after approximately 400 altitude-hours.
Altitude training key facts
- Minimum effective altitude: approximately 2,000 m. Below this, EPO stimulus is insufficient.
- Optimal duration: 3-4 weeks for meaningful Hbmass increase. Returns diminish after 6-8 weeks.
- Benefits decay: Hbmass returns to baseline within 3-4 weeks of returning to sea level.
- Peak performance window: 2-3 weeks after returning from altitude for most athletes.
- Individual variation is large: approximately 25-30 percent of athletes show minimal haematological response (non-responders).
Altitude training: frequently asked questions
How does altitude training improve performance?
Living at altitude (above 2,000 m) for 3-4 weeks stimulates erythropoietin (EPO) production, increasing red blood cell and haemoglobin mass. This enhances oxygen-carrying capacity and improves sea-level VO2max by approximately 1-3 percent per week of altitude exposure, up to a plateau. Training low preserves training quality by maintaining oxygen availability during sessions.
What is the Live High Train Low (LHTL) model?
LHTL is a training strategy where athletes live at altitude (2,000-2,500 m) to stimulate haematological adaptations while completing high-intensity training sessions at lower altitude (below 1,500 m) to maintain speed and power output. It was developed at the Australian Institute of Sport and validated in multiple studies including Chapman et al. (1998, Journal of Applied Physiology).
How much does altitude training increase haemoglobin mass?
A 4-week altitude camp at 2,000-2,500 m typically increases haemoglobin mass (Hbmass) by 3-5 percent. Prolonged exposure (6-8 weeks) may produce increases of 5-8 percent. The rate of increase averages approximately 1.1 percent per 100 hours of altitude exposure above 2,000 m, based on the meta-analysis by Garvican-Lewis et al. (2016).
When is the optimal time to compete after altitude training?
Optimal sea-level performance is typically achieved 2-3 weeks after returning from altitude, once immediate fatigue dissipates but before haematological benefits wane. Benefits persist for approximately 15-25 days post-altitude. Some athletes perform well immediately on return, but the 2-3 week window is supported by the majority of research.
What altitude is most effective for training camps?
2,000-2,500 m is the most widely used range for altitude camps. Below 2,000 m, EPO stimulus is insufficient for meaningful haematological adaptation. Above 2,500 m, training quality deteriorates significantly due to hypoxia. Altitude of exactly 2,200-2,400 m is the consensus sweet spot from the WADA-supported altitude research programme.
Official sources
- Garvican-Lewis LA et al. (2016). Altitude training and haemoglobin mass from the optimised carbon monoxide rebreathing method: a systematic review and meta-analysis. British Journal of Sports Medicine, 50(3), 173. PubMed 26758687.
- Chapman RF et al. (1998). Individual variation in response to altitude training. Journal of Applied Physiology, 85(4), 1448-1456. PubMed 9760340.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.