Marathon Training Plan

Running 42.195 km for the first time is as much a nutrition challenge as a training one. Get the calories wrong and you bonk at kilometre 32; get your weight wrong and every extra kilogram costs roughly two minutes per marathon. Here is how to use data — not guesswork — to cross your first finish line feeling strong.

Step 1: Know Your Starting Point with BMI

Before you ramp up mileage, establish a baseline. Use Bmi to calculate your Body Mass Index. A BMI in the 20–24 range is generally optimal for distance running — lean enough for efficient movement, heavy enough to absorb training load. If your BMI is above 27, losing even 2–3 kg before race day can meaningfully reduce joint stress and improve your pace per kilometre.

Your BMI also helps you set a realistic race-weight target. Don't aim to lose weight aggressively during peak training weeks; instead, use the number now to plan a gradual 8–10 week deficit during your base-building phase.

Step 2: Calculate Your Training Calories

Marathon training burns 400–700 extra calories per long run day, and cumulative weekly mileage adds up fast. Use Calorie to find your Total Daily Energy Expenditure (TDEE) for both rest days and heavy training days separately.

A common rookie mistake is eating at maintenance on easy days and forgetting to refuel on 25 km+ long-run days. This leads to chronic under-recovery, which manifests as fatigue, elevated resting heart rate, and a plateau in your pace improvements.

A practical split: - Rest days: TDEE at sedentary activity level - Easy run days (8–14 km): TDEE × 1.4 - Long run days (20 km+): TDEE × 1.6–1.8, with a 60–90 g carbohydrate intake during the run itself

Focus carbohydrates around your runs — oats or rice 2 hours before, gels or dates every 45 minutes during runs over 75 minutes, and a recovery meal with a 3:1 carbohydrate-to-protein ratio within 30 minutes of finishing.

Step 3: Track Your Progress as a Percentage

Goals feel abstract until you break them down into percentages. Use Percentage to measure weekly mileage increases (the standard rule is no more than 10% per week), monitor training adherence, and track pace improvements.

For example: if your goal pace is 6:00 min/km and your current comfortable pace is 6:45 min/km, you need a 11.1% pace improvement. That is achievable in 16 weeks — roughly 0.7% per week — through a structured speed-work programme of one tempo run and one interval session per week.

Putting It All Together

The taper phase — the final two weeks — is where many runners panic and over-eat. Trust the process: reduce your mileage by 40–50% but hold your calorie intake only slightly above maintenance to store glycogen for race day. A well-fuelled taper can add 5–10 minutes to your finish time through improved muscle glycogen and fresh legs.

Carbohydrate loading in the 3 days before the race (10–12 g of carbs per kg of body weight) combined with adequate hydration is your final performance lever. Stick to foods you have tested in training — race day is not the time to experiment.