running

Verified·Scanned 2/18/2026

Training principles, pacing strategy, injury prevention, and race preparation for runners.

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Training Fundamentals

  • 80/20 rule: 80% easy runs, 20% hard — most runners go too hard on easy days
  • Easy pace: can hold conversation, Zone 2 heart rate — feels too slow, but builds aerobic base
  • Weekly mileage increase: max 10% — exceeding causes injury, not faster adaptation
  • One quality session per week for beginners, two for experienced — more isn't better
  • Rest days are training days — adaptation happens during recovery, not during runs

Pacing Reality

  • Start slower than goal pace — first mile should feel easy, last mile is where race happens
  • Negative splits: second half faster than first — optimal race execution
  • Heart rate drifts upward in heat — same effort costs more, adjust pace down
  • Don't chase pace on hills — maintain effort, let pace vary with terrain
  • Race day adrenaline adds 10-15 seconds/mile perceived "free speed" — it's borrowed, you'll pay later

Workout Types

Easy run: 70-75% max HR, conversational — builds aerobic base, recovery Tempo: Comfortably hard, 20-40 minutes — lactate threshold improvement Intervals: 400m-1600m repeats with rest — VO2max, speed development Long run: 90+ minutes, easy effort — endurance, fat adaptation Strides: 20-30 second accelerations — form, leg turnover, not fitness

Injury Prevention

  • Most injuries from too much, too soon — not from running itself
  • Strength train 2x/week: glutes, hips, core — weakness causes compensation injuries
  • Replace shoes every 400-500 miles — cushioning degrades before visible wear
  • Foam rolling and stretching: after runs, not before — pre-run dynamic warmup only
  • Pain that worsens during run: stop — pain that fades after warmup: monitor

Common Form Errors

  • Overstriding: landing ahead of center of mass — causes braking force, knee stress
  • Cadence target: 170-180 steps/minute — shorter, quicker steps reduce impact
  • Arms crossing midline — wastes energy on rotation, keep forward-back
  • Heel striking isn't automatically bad — where you land relative to body matters more
  • Head position: look 30 feet ahead, not down — posture follows head

Race Preparation

  • Taper: reduce volume 40-60%, maintain intensity — 2 weeks for marathon, 1 week for half
  • Nothing new on race day: shoes, clothes, food, gels — tested in training only
  • Pre-race meal: 2-3 hours before, familiar foods, low fiber
  • Hydration: check urine is pale morning of — can't catch up race day
  • Arrive early: bathroom lines, warm-up time, corral positioning

Nutrition Timing

  • Pre-run (1-2 hours): carbs, low fat/fiber — 200-300 calories
  • During run (<60 min): water only — no fuel needed
  • During run (60-90 min): optional 30g carbs — test in training
  • During run (>90 min): 60g carbs/hour — gels, chews, sports drink
  • Post-run (within 30 min): protein + carbs — 15-25g protein, 50g+ carbs

Heart Rate Zones

Zone% Max HRFeelPurpose
150-60%Very easyRecovery
260-70%Easy, conversationalAerobic base
370-80%Moderate, focusedTempo
480-90%Hard, short phrasesThreshold
590-100%Maximum, unsustainableVO2max
  • Most runs should be Zone 2 — feels too easy but builds fitness without burnout

Training Block Structure

  • Base phase (4-8 weeks): build mileage, all easy — aerobic foundation
  • Build phase (4-6 weeks): add workouts, increase long run — specific fitness
  • Peak phase (2-3 weeks): highest intensity, maintain volume — sharpening
  • Taper phase (1-3 weeks): reduce volume, short intense efforts — freshness

Mental Strategies

  • Break race into segments — "just get to mile 6" beats thinking about full distance
  • Mantras: short, rhythmic phrases — "light and smooth", "I am strong"
  • Discomfort is temporary — the finish is coming whether you slow down or not
  • Run the mile you're in — don't borrow worry from future miles
  • Smile — physical cue that reduces perceived effort

Common Mistakes

  • Running every run at medium effort — too hard to recover, too easy to improve
  • Skipping easy weeks — deload every 4th week, reduce volume 30%
  • Ignoring warning signs — small aches become injuries if pushed through
  • All running, no strength — runners need glute and hip work especially
  • Racing too often — peak performance needs 2-3 week recovery between hard efforts