# 100K Running Form Coach

> Publication clarification — 22 September 2026: Session durations, progression percentages, downhill doses and the traffic-light thresholds below are practical planning examples, not validated injury-prevention rules or an individualized prescription. Adapt them to prior training and recovery; none is a target every runner must reach. Carbohydrate amounts are rehearsal examples rather than a minimum or a requirement to maximize intake. Clinical symptoms override the training plan.

**Version:** 1.2  
**Synced with:** `100K_Training_Protocol.md` and `100K_Training_Action_Plan.md` version 1.2  
**Effective date:** 28 August 2026  
**Purpose:** simple, repeatable running-form cues for efficient 100K training and race execution.

This is a self-coaching guide, not a claim that one ideal running form exists. Preserve natural movement unless a specific cue clearly improves comfort, control or efficiency. Never use a technique cue to run through worsening pain.

## 1. Coaching rules

1. Use **one cue at a time**.
2. Apply it for **20–60 seconds**, then run naturally and reassess.
3. Keep deliberate form work to **6–10 minutes total** inside an easy run.
4. Judge a cue by comfort, quietness, stability, breathing and RPE—not appearance alone.
5. Keep a cue only when it feels equal or easier at the same pace and does not create symptoms.
6. Do not force a foot strike, universal cadence, exaggerated forward lean or artificial knee lift.
7. Stop cueing when coordination declines. Fatigued rehearsal can be useful; practising poor movement is not.

## 2. The five-part form scan

Run through this scan in order. If the first cue fixes the issue, stop there.

### 1. Relax

**Cue:** “Soft face, low shoulders, loose hands.”

- Unclench jaw and fingers.
- Let the shoulders hang away from the ears.
- Keep breathing unforced; do not impose a breathing pattern as a running-form goal.

### 2. Stack

**Cue:** “Head over ribs, ribs over hips.”

- Look ahead rather than down at the feet.
- Stay tall without arching the lower back.
- Allow a small whole-body lean from the ankles when speed or gradient demands it; do not bend from the waist.

### 3. Swing

**Cue:** “Elbows back, hands pass the hips.”

- Let the arms move mainly forward and back.
- Keep the swing compact and matched to the legs.
- Avoid forcing the elbows or rotating rigidly; the goal is relaxed rhythm.

### 4. Land

**Cue:** “Short, quiet step under the moving body.”

- Do not reach the lower leg forward to find the ground.
- Let contact happen naturally beneath the body’s forward movement.
- Do not deliberately switch to forefoot striking. Quiet contact and reduced braking matter more than strike label.

### 5. Flow

**Cue:** “Quick enough, smooth enough.”

- Let cadence rise naturally with speed and hills.
- Do not chase 180 steps/min.
- If clear overstriding or braking persists, trial only about a **5% cadence increase** for a short easy segment, then reassess comfort and symptoms.

## 3. Default coaching sequence for an easy run

### Warm-up: first 10–15 minutes

- Run naturally at RPE 2–3.
- Notice breathing, contact sound, symmetry and any focal discomfort.
- Do not correct every sensation.

### Form block: 6–10 minutes total

Complete two rounds:

1. 30–45 s “soft face, low shoulders.”
2. 60–90 s natural running.
3. 30–45 s “head over ribs, ribs over hips.”
4. 60–90 s natural running.
5. 30–45 s “short, quiet step.”
6. 60–90 s natural running.

Use only the cue that produces a clear improvement during the remainder of the run.

### Optional strides

- 6–8 x 10–20 s relaxed acceleration after an easy warm-up.
- Cue: “Tall, loose, quick—not hard.”
- Walk or jog until breathing and coordination are fully reset.

## 4. Terrain-specific cues

### Flat easy running

- “Easy breath, quiet feet.”
- “Let the ground come to you.”
- Keep pace subordinate to RPE and terrain.

### Uphill running

- “Shorten, quicken, stay tall.”
- Lean slightly from the ankles, not the waist.
- Drive elbows back gently; do not force a long push-off.
- Hike before running becomes strained. Cue: “Fast feet, strong arms, no urgency.”

### Downhill running

- “Short, quick, controlled.”
- Keep gaze several steps ahead and the trunk stable.
- Avoid leaning backward and braking every step.
- Let speed come from rhythm only while control remains high.
- Slow down when contact becomes loud, the feet reach forward, or the quadriceps lose control.

### Technical trail

- “Eyes ahead, feet adapt.”
- Scan the intended line rather than staring at the current footfall.
- Shorten stride and widen it slightly when stability requires it.
- Prioritize safe placement over cadence, pace or symmetry.

### Power hiking

- “Tall hips, purposeful arms.”
- Use short, economical steps matched to gradient.
- If using poles, plant them close enough to support forward movement without excessive reaching.

### Late-run fatigue

Use this reset in order:

1. Exhale and relax face, shoulders and hands.
2. Re-stack head, ribs and hips.
3. Shorten the step slightly.
4. Let the arms restore rhythm.
5. Reduce pace or hike if quiet, controlled contact does not return.

## 5. Cue selector

| What you notice | Try this cue | Test | Abandon the cue if… |
| --- | --- | --- | --- |
| Loud contact | “Quiet feet” | 30–60 s at unchanged easy pace | Calves tighten or RPE rises |
| Foot reaching/braking | “Short step under me” | 30–60 s, then run naturally | It becomes a shuffle or creates hip/calf tension |
| Clear overstriding | Approximately 5% quicker rhythm | 2–3 x 1 min easy with natural running between | Comfort worsens or effort rises |
| Slumped posture | “Head over ribs, ribs over hips” | 30–60 s | Lower back becomes rigid or breathing feels restricted |
| Shoulder tension | “Loose hands, elbows back” | 30–60 s | Arm swing becomes forced |
| Uphill strain | “Shorten, quicken—or hike” | Until effort returns to target | Effort remains above target |
| Downhill braking | “Short, quick, controlled” | 20–40 s on a gentle descent | Control declines or pain appears |
| Late-race shuffle | “Relax, stack, short step” | One minute | Gait remains altered—slow or walk instead |

## 6. Form-focused sessions

Use at most one of these in a week; they complement rather than add to the training load.

### Easy technique session

- 15 min easy.
- Two rounds of the short form block from section 3.
- 6 x 15 s relaxed strides with full easy recovery.
- Easy running to finish.

### Short hill session for form

- 15–20 min easy warm-up.
- 4–6 x 10–15 s gentle hill acceleration.
- Cue: “Tall, quick, powerful but relaxed.”
- Walk down fully; stop before speed or posture deteriorates.

### Downhill-control session

- Include 6–10 accumulated minutes of gentle descending in an easy run.
- Cue only “short, quick, controlled.”
- Increase accumulated descending by about 5 minutes every 1–2 weeks only when soreness resolves within 24–48 hours.

## 7. Video self-check

Video is a comparison tool, not a beauty contest.

- Record 10–15 s from the side, front and rear at a normal easy pace.
- Repeat at the same pace and surface when reasonably fresh; optionally compare with a short clip late in a long run.
- Look for large, repeatable patterns: reaching foot, excessive crossover, marked asymmetry, collapsing posture or loss of downhill control.
- Change only one variable, then reassess comfort and RPE before reviewing appearance.
- Do not diagnose injury risk from one video or a single wearable metric.

## 8. Race-day cue card

### Opening third

**“Easy breath. Tall and loose. Protect the legs.”**

- Hold back even when pace feels effortless.
- Keep steps quiet and begin fueling early.

### Middle third

**“Smooth rhythm. Hike early. Fuel on schedule.”**

- Use terrain rather than ego to choose running or hiking.
- Reset shoulder and hand tension at every aid station.

### Final third

**“Relax, stack, short step—forward.”**

- Fix relaxation and step length before trying to increase cadence.
- If controlled form does not return, reduce pace or hike.
- Safety flags always override performance cues.

## 9. Stop signs

Stop technique work and reduce or end the session when there is:

- Altered or progressively asymmetric gait.
- Focal worsening pain.
- Loss of downhill control.
- New numbness, weakness or instability.
- Chest symptoms, fainting, illness or severe/unusual fatigue.

Do not interpret “mental toughness,” quiet feet or a cadence target as permission to continue through these signs.

## 10. Weekly coaching log

| Date/session | Terrain and fatigue | Cue tested | Immediate effect on comfort/RPE | Symptoms during/after | Keep, modify or discard |
| --- | --- | --- | --- | --- | --- |
|  |  |  |  |  |  |
|  |  |  |  |  |  |
|  |  |  |  |  |  |

Keep a cue only after it works repeatedly across comparable sessions. A cue that helps on a climb may be wrong on a descent or late in a long run.

## Sync rule

When evidence or athlete data justifies a running-technique change, update this coach in the same review as `100K_Training_Protocol.md` and `100K_Training_Action_Plan.md`. Use the same version number, preserve safety flags, and translate the evidence into a specific cue, test and rejection rule. If no change is justified, do not modify this file.

## Changelog

### 28 August 2026 — version 1.2

- Removed nasal breathing as a coaching consideration and synchronized with the evidence-only intensity framework in the protocol and action plan.

### 28 August 2026 — version 1.1

- Synchronized the version with the recovery update in the full protocol and action plan; running-form cues and safety rules are unchanged.

### 28 August 2026 — version 1.0

- Created the running-form coaching companion.
- Added the five-part Relax–Stack–Swing–Land–Flow scan, terrain cues, form sessions, video self-check, race cue card and stop signs.
- Preserved conditional cadence guidance and avoided forced foot-strike or universal-form prescriptions.