mountain-endurance-coach

name	mountain-endurance-coach
description	Knowledge base synthesized from Training for the Uphill Athlete, Ultrarunning Training Essentials, and mtnath.com essays. Use when applying mountain-endurance frameworks for periodization, thresholds, strength progression, load management, fueling, terrain specificity, and race execution.
allowed-tools	["Read","Grep"]
argument-hint	["topic","framework name","chapter number","or race demand"]

Mountain Endurance Coach

Sources: Training for the Uphill Athlete (House, Jornet, Johnston), Ultrarunning Training Essentials (Koop), and a structured mtnath.com synthesis | Generated: 2026-05-25 | Chapters: 12 thematic files

How to Use This Skill

• Without arguments — load the core frameworks below for a practical coaching lens.
• With a topic — ask about AeT, muscular endurance, gut training, heat acclimation, downhill prep, or another indexed term; read the most relevant chapter file.
• With a chapter — ask for ch05 or a chapter title when you want the deeper playbook.
• With a race demand — ask about a bottleneck such as long hot runnable 100K, technical steep 50K, or winter skimo crossover; use the event-demand lens first, then the relevant chapter.

When a topic is not fully covered by the Core section, read the linked chapter file and then the supporting files (glossary, patterns, cheatsheet) before answering.

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Core Frameworks & Mental Models

Start with demand, not workouts

Use Demands of the Event (DoE) before designing training. Map the race or project in four passes:

• external load: distance, vertical, grade, terrain, technicality, climate, aid spacing;
• internal stress: cardiovascular, metabolic, thermoregulatory, neuromuscular, GI, cognitive;
• likely bottleneck: what actually breaks the athlete first;
• monitoring metric: the signal that tells you whether the bottleneck is improving.

This keeps the plan specific. A steep technical sky race, a runnable hot 100 miler, and a snow-covered skimo event are not the same sport wearing different hats.

Build the engine before sharpening it

Use the aerobic-base-first model unless the athlete already has a small AeT–LT gap and strong load tolerance. Time on feet, consistent low-intensity work, and repeatable weeks create the mitochondria, capillary density, substrate flexibility, and durability that make later quality work useful instead of expensive.

Prefer this order:

1. establish consistent volume;
2. progress vertical and terrain specificity;
3. add threshold work once the base is stable;
4. add higher-intensity work only when it supports the event.

Guardrail: weekly time usually rises no more than about $7$–$10%$ unless returning from a recovery week to a previously tolerated level.

Use thresholds as decision tools, not as decorations

Use a dual-threshold model:

• AeT sets the top of durable aerobic work and usually the cap for Z2 HR.
• LT defines the top of controlled steady/tempo work and the lower edge of interval-heavy work.

Use the AeT–LT gap to decide emphasis:

• >20%: major aerobic deficiency; bias almost entirely toward Z1–Z2.
• 10–20%: still base-limited; add only small neuromuscular touches.
• <10%: good platform; threshold work can become a productive tool.

Heart rate, pace, grade-adjusted pace, and RPE should agree more often than they disagree. When they diverge, investigate fatigue, terrain, heat, or bad zones before forcing the session.

Periodize with intent

Use the macrocycle in four blocks:

• Transition — restore, rebuild routine, reintroduce general strength.
• Base — grow aerobic volume, durability, and specific movement capacity.
• Specific — make the work look more like the event: terrain, grade, fueling, and pacing demands.
• Taper — lower fatigue while preserving sharpness and movement feel.

The goal is not to stay “fit everywhere” year-round. The goal is to arrive at the right time with the right qualities emphasized.

Treat trail performance as four disciplines

Use Koop’s four disciplines as a planning checklist:

• climbing,
• flat/runnable terrain,
• technical terrain,
• descending.

Mountain athletes often undertrain at least one of these. Strong climbers may lose time on runnable terrain. Durable flat runners may not tolerate steep hiking or technical descents. Downhill skill is not just quad strength; it is vision, line choice, foot placement, trunk control, and eccentric tolerance.

Progress strength from general to specific

Use the strength ladder:

• General Strength to fix basic weakness and coordination;
• Max Strength to raise ceiling force with low reps and high quality;
• Muscular Endurance (ME) to convert force into event-specific repeatability, especially uphill.

Foot/ankle, hips, trunk, and posture matter because they preserve economy under fatigue. Power hiking also deserves direct practice in steep races; do not assume it appears automatically.

Manage load with both metrics and signals

Use objective and subjective monitoring together:

• training log,
• CTL/ATL/TSB or equivalent load trend,
• resting HR and HR drift,
• session grade,
• sleep, soreness, stress, and motivation.

Think of metrics as dashboard lights, not commandments. A rising CTL with worsening sleep, low mood, and dead legs is not success; it is delayed paperwork.

Fuel the system you actually built

Use Jornet’s practical sequence:

1. build oxidative capacity;
2. build absorption tolerance;
3. raise substrate delivery.

That means a big carbohydrate target is useful only if the athlete can absorb it and the race requires it. Gut training belongs in the plan, not as a race-week panic ritual. Hydration and sodium are contextual tools, not magic charms.

Train psychology and environment like physiology

Use process goals, visualization with obstacles, self-talk, and pressure rehearsal because the brain regulates pacing, pain interpretation, and decision quality. Cognitive fatigue is real. Heat, altitude, cold, and sleep disruption are also trainable stressors, not background scenery.

Default to individuality and scope limits

No cookbook survives contact with a real athlete. Modify for:

• sex and menstrual-cycle context,
• energy availability and RED-S risk,
• age and history,
• terrain access,
• work and family load,
• injury profile,
• climate.

This skill supports training design, monitoring, and race preparation. It does not replace medical, psychological, or dietetic care when red flags appear.

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Chapter Index

#	Title	Key Frameworks
ch01	Physiology and Energy Systems	endurance tripod, lactate shuttle, endurance string theory
ch02	Intensity Zones and Thresholds	AeT/LT model, zone anchors, gap analysis
ch03	Periodization and Training Principles	overload/recovery, progression, macrocycle phases
ch04	Long-Range and Weekly Planning	A/B/C priorities, weekly template, capacity-opportunity-motivation
ch05	Strength, Muscular Endurance, and Durability	stage progression, max strength, ME conversion
ch06	Trail Specificity: Uphill, Downhill, Technical Terrain	four disciplines, trail grade, downhill skill
ch07	Load Monitoring, Recovery, and Red Flags	CTL/ATL/TSB, fatigue matrix, recovery hierarchy
ch08	Environmental Adaptation: Heat, Altitude, Cold	acclimation blocks, thermoregulation, cooling strategies
ch09	Fueling, Hydration, and Gut Training	substrate sequence, gut training, intake progression
ch10	Mental Skills, Pressure, and the Central Governor	RPE regulation, process goals, obstacle visualization
ch11	Female Athlete and Individual Context	individuality, cycle-aware adjustments, RED-S awareness
ch12	Race Strategy, Event Demands, and Failure Points	DoE audit, failure-point analysis, contingency protocols

Topic Index

• AeT → ch02, glossary.md, cheatsheet.md
• AeT–LT gap → ch02, patterns.md
• aerobic base → ch01, ch03
• aid stations → ch12
• A/B/C races → ch04
• ATL → ch07, glossary.md
• central governor → ch10
• CTL → ch07, glossary.md
• demands of the event → ch12, patterns.md
• downhill prep → ch06, ch05
• female athlete → ch11
• four disciplines → ch06
• general strength → ch05
• gut training → ch09, patterns.md
• heat acclimation → ch08
• HR drift → ch02, ch07
• hydration → ch09, ch08
• individuality → ch03, ch11
• lactate threshold → ch01, ch02
• macrocycle → ch03, ch04
• menstrual cycle → ch11
• mental skills → ch10
• muscular endurance → ch05
• NGP → ch02, glossary.md
• periodization → ch03, ch04
• power hiking → ch06
• race strategy → ch12
• recovery week → ch07, cheatsheet.md
• RED-S → ch11
• specificity → ch03, ch06
• strength progression → ch05, patterns.md
• taper → ch03, ch12
• technical terrain → ch06
• thermoregulation → ch08, ch12
• TSB → ch07, glossary.md
• uphill training → ch05, ch06
• vertical gain → ch04, ch06
• VO2max → ch01, ch02
• weekly template → ch04, cheatsheet.md
• zones → ch02, cheatsheet.md

Supporting Files

• glossary.md — key terms and concise definitions
• patterns.md — reusable coaching patterns and decision frameworks
• cheatsheet.md — quick-reference tables, formulas, and guardrails

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Scope & Limits

This skill synthesizes the three source documents into one coaching-oriented toolkit. It is best for planning and explaining trail, mountain, skimo-adjacent, and ultrarunning training. It is not a medical manual and should escalate to qualified professionals for injury diagnosis, systemic illness, persistent pain, suspected RED-S, endocrine issues, or mental-health emergencies.