Taper Percentage Calculator

Frequently Asked Questions

• What is a taper in running?

  A taper is a planned reduction in training volume (mileage) in the weeks before a race. It allows the body to recover from training stress, repair micro-damage, and arrive at race day fresh and ready to perform.

• How much should I reduce mileage during taper?

  Typical taper: 20–30% reduction per week. Marathon 3-week taper: Week 1 = 80% of peak, Week 2 = 60%, Race week = 40%. Half marathon 2-week taper: Week 1 = 75%, Race week = 50%.

• How long should my taper be?

  Marathon: 2–3 weeks. Half marathon: 1–2 weeks. 10K: 1 week. 5K: 3–5 days. Longer races need longer tapers to recover from higher training loads.

• Should I reduce intensity during taper?

  Maintain some intensity (2 quality sessions per week) but reduce volume. Intensity maintains race-specific fitness. Just reduce easy mileage. Race-pace work can continue in taper.

• What is taper madness?

  A common phenomenon where runners feel sluggish, anxious, or ill during taper. It's normal — your body is adjusting to reduced load. Trust the process. Most symptoms resolve by race day.

• Can I taper too much?

  Yes. Excessive taper (>40% reduction per week for >3 weeks) can cause detraining. Keep intensity up even as volume drops. Minimum 2 quality runs per week throughout taper.

• What should race week training look like?

  Race week: 40–50% of peak mileage. 1 short tune-up race-pace workout (2–3 days before race). Easy runs only otherwise. Rest 1–2 days before race.

• Does taper work the same for all distances?

  Shorter races (5K, 10K) need minimal taper. Longer races (marathon, ultra) require more aggressive volume reduction. The longer the race, the more recovery is needed pre-race.

• Should I change my diet during taper?

  Maintain carbohydrate intake despite lower mileage. Many runners increase carbs in final 2–3 days (carbo-loading). Avoid new foods. Stay hydrated.

• When should peak week be relative to race day?

  Peak mileage should occur 3–4 weeks before marathon, 2–3 weeks before half marathon. This gives enough time to taper without losing fitness.

• What if my race is postponed during taper?

  If postponed 1–2 weeks, return to moderate training volume (70–80% of peak), then taper again. If postponed 4+ weeks, build back up toward peak before retapering.

• Does taper improve race performance?

  Research consistently shows 2–3% performance improvement from proper taper (Mujika & Padilla, 2003). Adequate taper is one of the most evidence-backed performance enhancers available.