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Alexa's Thunder Run 1/2 Marathon pacing + fueling

Pacing rules, common mistakes, and fueling rehearsal guidance for Alexa's Thunder Run 1/2 Marathon.

Last updated/Mar 20, 2026, 11:57 PM
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Pacing: the simplest rule that wins

Start conservatively, settle into rhythm, and protect the last 10K. If conditions change (heat, hills, wind), pace by effort and let splits drift.

Fueling: practice, don’t guess

  • Start fueling early (many failures are “first hour” failures).

  • Pick a schedule you can repeat under fatigue.

  • Practice on long runs so race day is automatic.

Fueling baseline (adjust for you)

  • Carbs: many runners land around 60–90g carbs/hour when gut-trained; start lower if you’re new to fueling.

  • Fluids: a common starting point in mild conditions is ~300–600 ml/hour; adjust up in heat and down in cold.

  • Sodium: sweat rates vary; use the fueling planner to keep it consistent and practice in training.

Tools

Back to the athlete guide.

Training guardrails

  • Keep easy runs truly easy so workouts stay high quality.
  • Progress one variable at a time (volume first, then intensity).
  • Use cutback weeks every 3–4 weeks to absorb training.
  • If pain changes your gait, scale back and get assessed.

How to use this guide

Treat this page as a decision checklist:

  1. Confirm the race date and official logistics.
  2. Choose a realistic training plan length (16–24 weeks is common).
  3. Practice fueling and pacing in long runs.
  4. Keep race week simple: tested shoes, tested gels, conservative start.

Verification reminder

Race details change between editions (dates move, routes get rerouted, and registration rules update). Use this page as a starting point, then confirm time-sensitive details on the official site close to race day.

Training guardrails

  • Keep easy runs truly easy so workouts stay high quality.
  • Progress one variable at a time (volume first, then intensity).
  • Use cutback weeks every 3–4 weeks to absorb training.
  • If pain changes your gait, scale back and get assessed.

How to use this guide

Treat this page as a decision checklist:

  1. Confirm the race date and official logistics.
  2. Choose a realistic training plan length (16–24 weeks is common).
  3. Practice fueling and pacing in long runs.
  4. Keep race week simple: tested shoes, tested gels, conservative start.

Put this into action

Open the plan and tool that match this guide

Checklist

Do this, not that

Pacing + fueling checklist

  • Pick a conservative first 10K effort cue (not a split).
  • Decide what ‘too hard’ feels like early and avoid it.
  • Start fueling within the first 30–45 minutes.
  • Rehearse your gel schedule on long runs (same timing).
  • If it’s hot, reduce intensity early and fuel/hydrate more consistently.
  • If it’s hilly, keep effort even; don’t chase splits uphill.
  • Treat the halfway point as a check-in, not a green light.
  • If you feel great at 30K, earn acceleration gradually.

iOS app

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Keep going

Sources