Planning Weekly Vertical Gain (D+) Training Volume for Trail Running

Why D+ Matters More Than Mileage

There’s a saying in trail running: “Mileage determines 60%, vertical gain determines 40%.” A runner who logs 60K per week with 0m of climbing cannot handle a 50K/D+2500m race. The principle of training specificity tells us: if you want to climb mountains, you have to train on climbs.

Recommended Weekly D+ by Target Race

18-Week Training Template (Using 50K as an Example)

Base Phase (Weeks 1-6)

• Weekly D+: 1500-2000m
• One long hike-run per week (600-800m of climbing)
• No speed work; build endurance and muscular adaptation

Build Phase (Weeks 7-12)

• Weekly D+: 2500-3500m
• Add uphill intervals (5×3 minutes on steep terrain)
• One 4-5 hour trail LSD per week

Peak Phase (Weeks 13-16)

• Weekly D+: 3500-4000m
• Race-day simulation: full pack + nutrition + gear
• Two consecutive days with cumulative climbing of 2500m (back-to-back)

Taper Phase (Weeks 17-18)

• Cut weekly D+ down to 1500m
• Maintain rhythm; no new stimuli

How Can City Runners Accumulate D+?

For runners without access to mountains:

1. Stair running: 30 flights ≈ 90m of climbing; repeat 10 times = 900m
2. Bridge running: One round trip across a large bridge is about 30-50m
3. Hill repeats: Find a long slope with 5-8% grade and run up and down repeatedly
4. Treadmill incline: Walking/jogging at 8-12% incline for 60 minutes can accumulate 600-900m
5. VertClub concept: Take a weekend ride to suburban trails and bank 1500m in one session

Recovery Cost of Climbing Training

Downhills cause significant eccentric contraction damage; recovery time after climbing training is 1.5-2 times that of flat running. Scheduling principles:

• Schedule 1-2 days of complete rest or cross-training after a big climbing day
• Only schedule consecutive climbing days (back-to-back) once every 3 weeks
• Monthly total D+ increases should not exceed 10-15% (same as the 10% rule)

Monitoring Metrics

Conclusion

In the training prescription for trail running, D+ is the main ingredient; mileage is the supplement. Writing weekly D+ into your training log predicts your trail performance better than weekly mileage.

Related Reading

• Trail Training Log and Vertical Gain D+: Don’t Just Look at Distance
• 6-Month Trail Race Plan: A Complete Cycle from Mileage Base to Specific Training
• Trail Running Vertical Gain Training: Periodizing Vert into Your Legs
• Ultramarathon Training Load: Recommendations for Weekly Mileage, Vertical Gain, and Long Run Distance