That starting pistol crack still echoes, the sharp sound splitting the cool Edinburgh morning, my heart already racing before I’d even moved. When I looked up at the crowd ahead and realised I was running alongside thousands of others, we were all bound by the same quiet commitment: run the distance, not the drama.

The opening kilometre came easy, my feet settling into the rhythm I’d built over months of long training runs. But as the distance grew, something inside kept asking, “Is this pace right, or am I pushing too hard?”

Developing a pacing philosophy

The “marathon is a 10k with a 20-mile warm-up”

That line struck me as clever wordplay at first, break the race into two parts: a 10 km effort followed by a sustained, slower push. The logic works because it divides the race into two zones you already know well:

• First 10 km: an easy, aerobic effort where breathing stays controlled and you could hold a conversation
• Next 20+ km: a steady warm-up phase where you’re moving, but far from all-out

Research in exercise physiology confirms that steady heart-rate zones through the opening miles reduce early glycogen loss and help you avoid the wall (Bickham et al., 2018). Starting 5–10% slower, a negative split approach, shows up repeatedly in the data as a predictor of faster overall times, whether you’re running professionally or for the first time (Knechtle et al., 2020).

Practical self-coaching steps

Getting your pacing right starts with numbers, but it has to translate to feel:

1. Start with your goal pace. Look at recent long runs and build backwards from there. Want a sub-4-hour marathon? That’s roughly 9:07 per mile, or about 5.6 minutes per kilometre.
2. Set up your pace zones in your watch or training app. Create three bands, easy, steady, marathon, so you can see at a glance where you are. This keeps you honest without having to think too hard mid-race.
3. The opening 10 kilometres should feel almost sluggish. Run at 10% below your goal pace. This builds mental confidence and keeps your heartbeat manageable.
4. Let your pace drift gradually upward between miles 10 and 15, using your watch to stay honest. Real-time feedback beats gut feel when your legs are tired.
5. Save something for the end. If you’re still feeling strong after mile 20, ease up your pace over the final 6 km, maybe down to 8:50–8:55 per mile if you’re chasing that sub-4 goal.

Modern pacing apps give you exactly what you need at the moment you need it, zone guidance, split data, adaptive coaching. The real value isn’t the shiny interface; it’s the information they hand you when fatigue makes decision-making fuzzy.

Closing & next workout

The journey of running is a long one, and the more you learn to read your own body, the more you’ll discover what works. Try the “Marathon Pace Warm-up” workout to put this learning into practice:

• Warm-up: 2 km easy (5:30 min/km)
• Main set: 10 km at 10 % slower than goal marathon pace (e.g., 10:00 min/mile for a 9:07 goal)
• Progression: 5 km at target marathon pace
• Cool-down: 3 km easy

Pick a flat course, watch your splits carefully, and observe what happens when you hold back early, how much stronger you feel later. Your next marathon can read like a story you’ve written the ending for, with every stride on your terms.

References

• Marathon Pacing: 6 Lessons Learned from a PR Near Miss - Strength Running (Blog)
• Last-minute pacing tips for your next half marathon (Blog)
• Q+A: How should I tackle my first marathon? (Blog)
• Ask The Experts: Marathon Training with Paul Evans (Blog)
• Choosing a Marathon Pacing Strategy | TrainingPeaks (Blog)
• Finding Your Perfect Half Marathon Pace (Blog)

Workout - Negative Split Practice Run

• 2.0km @ 6'15''/km
• 10.0km @ 6'15''/km
• 5.0km @ 5'40''/km
• 3.0km @ 6'45''/km

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