ギャロウェイ式ラン/ウォーク計算機 — レースプラン作成

ラン/ウォークプランナーの仕組み

プランナーはジェフ・ギャロウェイの方法に基づいた完全なレース戦略を計算します。目標フィニッシュタイム、レース距離、ラン/ウォーク比率、ウォークペースを入力します。計算機は逆算して、ウォーク距離、トランジションタイム（切り替えごとに約5秒）、総インターバルを考慮した正確なランペースを決定します。結果にはレース当日に印刷可能なセグメントごとのプランが含まれます。

ラン/ウォークインターバルの背後にある科学

短いウォークブレイクは疲労の蓄積を中断し、ランナーをレースのより大きな割合で換気閾値以下に保ちます。ギャロウェイの200,000人以上のマラソン完走者のデータは、怪我が大幅に減少し、フィニッシュタイムもしばしば速くなることを示しています。心理的なメリットも同様に強力です — ウォークブレイクが常に数分先にあるとわかっていることで、持久走のメンタル的な負担が軽減されます。

ラン/ウォーク比率の選び方

4:1：ランニング時間の約80%、経験豊富なランナー向け。3:1：中級ランナー向けのバランスの取れたオプション。2:1：初心者や暑い条件での頻繁な回復 — 栄養摂取にも最適。1:1：最も控えめ、初マラソンランナーに最適。迷ったら、より控えめな比率を選びましょう。

レース当日のラン/ウォークプランの実行

タイマー：GPSウォッチにリピートインターバルをプログラム。マナー：歩く時は右側に移動し、手を上げてシグナル。栄養：ウォークブレイクを給食ウィンドウとして活用 — 歩きながらジェルを摂取すると胃腸トラブルが減少。最終マイル：連続して走り続けたい誘惑に抵抗。プランに忠実に従えば、最終キロメーターでペースが落ちたランナーを追い抜くことができます。

Setting Up Run/Walk Intervals on Your Watch

The hardest part of the Galloway method isn't the running — it's remembering to switch. Let your watch handle transitions with a repeating interval timer that buzzes every time you should change, so you never have to watch the clock.

Apple Watch: The built-in Workout app supports custom intervals on watchOS 9 and later. Open the Workout app, choose Outdoor Run, and create a Custom workout with a repeating Work block (your run interval) and Recovery block (your walk interval). The watch vibrates at every switch. On older watchOS, a dedicated interval app such as Intervals or Seconds Pro does the same job.

Garmin: Most running models include a native Run/Walk alert — open the Run activity settings, enable Run/Walk, and enter your run and walk durations; the watch beeps and vibrates at each interval. You can also build a custom interval workout in Garmin Connect and sync it to the watch.

Coros, Suunto and Polar: Use the interval or custom-workout mode and program a run block followed by a walk block on repeat.

No GPS watch? A free phone interval-timer app (Intervals, Seconds Pro, or your running app's built-in interval mode) works just as well — set two alternating alerts and start it at the gun. Avoid timing intervals by feel: runners almost always stretch the run portion and skip the walk breaks.

The Jeff Galloway Method: Origins and Evolution

Jeff Galloway, a 1972 US Olympian (10,000 m), developed the run/walk/run method — known among UK runners as 'jeffing' — after observing that runners who took strategic walk breaks finished with faster times and fewer injuries than those who ran continuously. Since the 1970s, the method has helped over 300,000 runners complete marathons.

The core principle is simple: by inserting walk breaks before muscles fatigue, you maintain better running form, reduce impact forces by up to 30%, and use glycogen more efficiently. Galloway's research at his running camps showed that runners using a 4:1 run/walk ratio finished marathons an average of 7 minutes faster than when they ran the same distance without walk breaks.

The method works because walk breaks activate different muscle fibers, allowing the primary running muscles brief recovery periods. This is not a beginner-only strategy — elite ultramarathon runners routinely use structured walk breaks to optimize performance over long distances.

Run/Walk Ratio Guide by Experience Level

Choosing the right run/walk ratio is the most important decision in the Galloway method. Your ratio should match your current fitness level, not your target.

Beginners (less than 6 months of regular running or pace slower than 7:00/km): start with 30 seconds run / 30 seconds walk, or 1 minute run / 1 minute walk. This ratio reduces injury risk by 60% compared to continuous running.

Intermediate runners (6-18 months experience, pace 5:30-7:00/km): use 3-4 minutes run / 30-60 seconds walk. This is the sweet spot for most recreational marathon runners.

Advanced runners (18+ months, pace faster than 5:30/km): use 6-8 minutes run / 30 seconds walk. At this level, walk breaks serve primarily as mental resets and form corrections.

Important: always start your walk break BEFORE you feel tired. The purpose is prevention, not recovery. If you wait until fatigue sets in, you have already lost the biomechanical advantage. During your walk breaks, focus on: upright posture, relaxed shoulders, quick arm swing to maintain momentum, and deep belly breathing.

Galloway Run/Walk Ratio and Pace Chart

Use this chart to pick a starting ratio, then let the calculator above turn it into exact paces for your goal time. Match the ratio to your current fitness, not your target.

When in doubt, choose the more conservative ratio — it is far easier to tighten intervals late in a strong race than to recover from starting too hard.

5 Common Mistakes in Run/Walk Training

Mistake 1: Starting walk breaks too late. Many runners skip their scheduled walk break because they feel good. This defeats the purpose. Walk breaks work by preventing fatigue accumulation, not by recovering from it. Follow the timer strictly.

Mistake 2: Walking too slowly. Your walk break should be brisk — approximately 30-45 seconds per km slower than your run pace. A shuffling walk provides no mechanical benefit and actually increases ground contact time.

Mistake 3: Using the same ratio for training and racing. In races, the adrenaline and crowd energy mean you can sustain a more aggressive ratio than in training. If you train with 4:1, consider racing with 5:1 or 6:1.

Mistake 4: Not practicing transitions. The run-to-walk and walk-to-run transitions take practice. During training, count your steps during each transition — aim for no more than 3 deceleration steps and 3 acceleration steps.

Mistake 5: Abandoning the method mid-race. When the race gets hard (typically after km 30 in a marathon), the temptation is to either stop walking entirely or walk for much longer. Stick to your planned ratio. Consistency is the magic ingredient.