High-Altitude Training: Physiological Adaptations and Training Adjustments Above 1500m

Impact of High Altitude on the Human Body

Changes in Atmospheric Pressure and Oxygen Partial Pressure

As altitude increases, atmospheric pressure decreases, leading to a drop in the partial pressure of inspired oxygen:

Altitude	Atmospheric Pressure (hPa)	Oxygen Partial Pressure vs. Sea Level	Decrease in Maximal Oxygen Uptake
0m (Sea Level)	1013	100%	0%
500m	955	94%	-2%
1000m	899	89%	-4%
1500m	846	83%	-7%
2000m	795	78%	-10%
2500m	747	74%	-14%
3000m	701	69%	-18%
3500m	657	65%	-22%

High-Altitude Training Hotspots in Taiwan

Location	Altitude	Route Characteristics	Suitable Training
Yangmingshan Little Oil Pit	800m	Short and steep	Uphill repeats
Northern Cross Baoling	700m	Gentle slope highway	Long distance
Alishan Park	2200m	Mostly gentle slopes	High-altitude endurance
Hualien Mountain Songxue Building	3150m	Mountain highway	Acclimatization training
Wuling	3275m	Short distance high intensity	Extreme challenge
Yushan Tatatga	2610m	Gentle forest road	Off-road training
Taiping Mountain Cuifeng Lake	1840m	Forest road loop	Mid-altitude long run

Understanding Acute Mountain Sickness (AMS)

Symptom Grading

Mild: Headache, slight dizziness, decreased appetite, difficulty falling asleep

Moderate: Severe headache, nausea and vomiting, significant decline in exercise capacity

Severe (Life-threatening):

• HACE (High Altitude Cerebral Edema): Confusion, unsteady gait, drowsiness
• HAPE (High Altitude Pulmonary Edema): Shortness of breath, coughing up pink frothy sputum

Altitude Threshold for Occurrence

• Above 2500m: 30-40% of runners experience mild symptoms
• Above 3000m: 50% of runners experience mild symptoms
• Above 3500m: 60% of runners experience moderate symptoms

High-Risk Individuals

• Direct ascent from low altitude (< 100m) to 2500m+
• Engaging in high-intensity exercise immediately after ascending
• Dehydration, cold
• History of AMS

4 High-Altitude Training Methods

1. Live High Train High (LHTH)

• Mode: Accommodation and training both at 2000-3000m
• Duration: 3-4 weeks
• Suitable: Elite runners for pre-race preparation
• Drawback: Decreased training quality (unable to achieve target pace)
• Taiwan Implementation: Accommodation at Hualien Mountain, Alishan

2. Live High Train Low (LHTL)

• Mode: Accommodation at 2000-2500m, training below 1000m after descending
• Duration: 3-4 weeks
• Suitable: Elite marathon runners
• Advantage: Maintains training intensity + red blood cell production
• Taiwan Implementation: More difficult (terrain not suitable)

3. Live Low Train High (LLTH)

• Mode: Accommodation at sea level, training at 1500m+ on weekends
• Duration: 1-2 times per week
• Suitable: Amateur runners
• Drawback: Limited red blood cell production effect (insufficient exposure time)
• Taiwan Implementation: Wuling, Hualien Mountain on weekends

4. Intermittent Hypoxic Training (IHT)

• Mode: Use of hypoxic tents or hypoxic masks
• Duration: 1-3 hours daily
• Suitable: Runners unable to reach high altitude
• Equipment: Hypoxic tents (expensive), hypoxic masks (limited effect)

Altitude Pace Adjustments

Jack Daniels VDOT Formula Adjustments

Taking a sea-level 5:00/km M pace as an example:

Training Altitude	E Pace	M Pace	T Pace	I Pace
0-500m	Baseline	Baseline	Baseline	Baseline
500-1000m	+3 seconds	+5 seconds	+7 seconds	+10 seconds
1000-1500m	+8 seconds	+10 seconds	+15 seconds	+20 seconds
1500-2000m	+15 seconds	+20 seconds	+25 seconds	+35 seconds
2000-2500m	+25 seconds	+30 seconds	+40 seconds	+50 seconds
2500-3000m	+40 seconds	+45 seconds	+60 seconds	+75 seconds
3000m+	+60 seconds	+70 seconds	+90 seconds	Not recommended

High-Altitude Acclimatization Protocol

Day 1-2: Acclimatization Period

• No training for the first 24-48 hours after arrival
• Walking only, altitude changes not exceeding 500m
• Hydration: 3000-4000 ml/day
• High-carbohydrate diet (65-70% carbohydrates)
• Monitor for AMS symptoms

Day 3-5: Low-Intensity Start

• E pace for 30-45 minutes
• Control heart rate by reducing 10-15 bpm
• Pause every 5 minutes to check body condition
• Stop immediately if abnormalities appear

Day 6-10: Moderate Intensity

• E pace for 60 minutes
• Include M pace short segments (5-10 minutes)
• Still avoid interval training

Day 11-21: Full Training

• M and T paces can be performed
• I pace: Small amount of trial
• Monitor morning SpO2 (blood oxygen)

Monitoring Indicators

Morning Blood Oxygen (SpO2)

Measure using a pulse oximeter:

Altitude	Normal SpO2	Warning SpO2
0-1000m	96-99%	< 94%
1500m	94-97%	< 92%
2000m	92-96%	< 90%
2500m	90-95%	< 88%
3000m	88-93%	< 85%

If warning values appear: Rest + assessment, may need to descend altitude.

Morning Heart Rate

An increase of 8-15 bpm above baseline is normal adaptation; an increase of more than 20 bpm requires alertness.

Subjective Symptoms

Daily morning self-assessment:

• Sleep quality (1-10)
• Appetite (1-10)
• Headache intensity (1-10)
• Training feeling (1-10)

If total score drops by more than 30% over 2 consecutive days → Pause training, consider descending altitude.

Red Blood Cell Response to High-Altitude Training

Red Blood Cell Production Timeline

• Day 1-3: EPO (Erythropoietin) rises 50-200%
• Day 4-7: New red blood cells begin to increase
• Day 14: Red blood cell volume increases 5-8%
• Day 21: Stable increase of 8-12%
• Day 28+: Diminishing returns

Conclusion: High-altitude training requires at least 3 weeks for complete red blood cell benefits.

Benefits Retained After Descent

• 7 days after descent: 80-90% benefits retained
• 14 days after descent: 60-70% benefits retained
• 21 days after descent: 30-40% benefits retained
• 28 days after descent: Benefits disappear

Race Strategy: Competing 7-21 days after high-altitude training yields the best results.

Hydration Strategy

Hydration

Daily basic needs at high altitude:

• Sea level: 30-40 ml/kg
• 1500m: 40-50 ml/kg
• 2500m: 50-60 ml/kg
• 3000m+: 60-70 ml/kg

A 70 kg runner at 2500m: 3500-4200 ml daily.

Iron Supplementation

Red blood cell production requires iron:

• Men: 18-20 mg daily
• Women: 25-30 mg daily
• Sources: Red meat, animal liver, dark leafy greens, iron supplements

Starting iron supplementation 4 weeks before ascent yields the best results.

Antioxidants

Increased oxidative stress at high altitude:

• Vitamin C: 500-1000 mg/day
• Vitamin E: 200-400 IU/day
• Sources: Berries, dark-colored fruits and vegetables, nuts

Practical Advice for Taiwanese Runners

Amateur Runners (Marathon sub 4)

• No need to specifically pursue high-altitude training
• Occasional day trips to Wuling or Hualien Shan are sufficient
• Focus on solid training volume at low altitude

Advanced Runners (Marathon sub 3:30)

• Schedule 1-2 high-altitude weekends 6-8 weeks before the race
• 2-3 day training camps at Alishan or Hualien Shan
• Experience high-altitude conditions and adapt breathing rhythm

Elite Runners (Marathon sub 3 or National Team)

• Conduct 2-3 weeks of high-altitude training camps 4-6 weeks before the race
• Accommodation at Hualien Shan plus training on surrounding routes
• Coordinate with monitoring (SpO2, HRV, blood tests)
• Race 10-14 days after descending

Conclusion: High Altitude is a Tool, Not a Panacea

High-altitude training can improve aerobic capacity by 1-3%, which is a key differentiator for elite runners, while for amateurs it is merely a fine-tuning adjustment.

More importantly: Taiwan’s mountains are beautiful, and running itself is a form of enjoyment. Even without PR improvements, running in the cloud sea of Hualien Shan or in the forests of Alishan is the best training motivation in itself.

Related Reading

• Cycling around Taiwan’s Hundred Peaks: Adjusting for High-Altitude Cold and Low Atmospheric Pressure
• Physiology of High-Altitude Cycling: Scientific Preparation for Taiwan’s Mountain Cycling
• Benefits of Altitude Training for Cyclists: Altitude’s Impact on Red Blood Cells
• High-Altitude Training Guide: How Flatlanders Can Leverage the Altitude Effect to Improve Performance