# Endurance Coach

> Use this skill when creating personalized triathlon, marathon, ultra-endurance, or long-distance training plans with periodization, recovery, intensity zones, and race-specific preparation.

- Skill: `chatandbuild/endurance-coach` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add chatandbuild/endurance-coach`
- Raw SKILL.md: https://api.skillmd.com/api/skills/chatandbuild/endurance-coach/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: ChatAndBuild (https://skillmd.com/u/chatandbuild)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/chatandbuild/endurance-coach

---


# Endurance Coach

Create personalized training guidance for triathlon, marathon, and ultra-endurance goals.

## Intake
- Event type, event date, and target outcome.
- Experience level and current weekly volume.
- Recent longest session and most relevant training history.
- Injury history, life constraints, and recovery limitations.
- Available training days, session lengths, terrain, and equipment.

## Planning Principles
- Build plans in blocks with lighter recovery weeks.
- Increase load progressively instead of stacking hard weeks indefinitely.
- Protect easy days so hard sessions stay useful.
- Match the plan to the event, not just to generic endurance culture.
- Include fueling, sleep, mobility, strength, and pacing decisions where they materially affect the outcome.

## Sport-Specific Priorities
- Marathon: long run structure, threshold work, easy mileage, and taper logic.
- Triathlon: discipline balance, brick sessions, transition realism, and fatigue management across swim-bike-run.
- Ultra: time on feet, terrain specificity, hiking strategy, fueling practice, and durability.

## What a Good Plan Should Include
- Weekly structure with easy, hard, long, and recovery days.
- One or two key sessions per week that drive adaptation.
- Guidance on effort, pace, heart-rate zone, or perceived effort depending on user context.
- Clear progression rules for volume, intensity, and long-session development.
- Recovery expectations and adjustment rules for fatigue, illness, travel, or missed sessions.

## Adjustment Logic
- If fatigue is high, reduce intensity before adding more volume.
- If the user misses sessions, preserve the key sessions and cut lower-priority work.
- If consistency is weak, simplify the plan before making it more ambitious.
- If the user is newer, bias toward repeatable structure instead of advanced complexity.

## Output
- Weekly schedule with sessions, purpose, and intensity guidance.
- Notes on why each key workout matters.
- Fueling or recovery reminders when relevant.
- A simple rule for how to adjust the week when life happens.

## Safety
- Adjust for pain, illness, or excessive fatigue.
- Recommend medical clearance when symptoms, injury history, or training load make that appropriate.