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Mile 18 of a marathon. Kilometre 7 of a 10K when you’ve gone out too fast. The final stretch of a tempo run when your legs are screaming and your brain is compiling a very convincing list of reasons to stop. Every runner knows this moment. It’s not a sign you’re weak or undertrained — it’s just what running feels like when you’re pushing your limits.
The question isn’t whether it will get hard. It will. The question is what you do when it does. And unlike some of the more glamorous aspects of running — your shoes, your watch, your training plan — your mental toolkit is free, always available, and genuinely trainable. You don’t need to be an elite to use these strategies. They work for someone chasing a sub-30 minute 5K just as well as they work for someone targeting a sub-4 marathon.
This isn’t about forcing yourself to think positively or pretend it doesn’t hurt. It’s about having actual techniques ready so that when things get ugly, you’re not making up a plan on the fly.
Why your brain is the first thing to quit
Your body has more in reserve than your mind believes. Research from Samuele Marcora at the University of Kent suggests that fatigue during exercise is largely a perception — a signal your brain generates to protect you from harm, not an accurate readout of your physical limit. In other words, when you feel like you have to stop, you often have more left than you think.
This is useful information, but it’s also humbling. It means that when you bail on a hard session or slow dramatically in a race, the limiting factor is often mental before it’s physical. The good news: that’s something you can work on directly.
Chunk it down — stop thinking about the whole thing
One of the most effective and straightforward strategies is to stop running the full distance in your head. If you’re at mile 8 of a half marathon and thinking about the 5.1 miles still to go, you’re loading unnecessary weight onto every step.
Instead, shrink your goal to the next landmark: the next kilometre marker, the next lamppost, the crest of the next hill, the next road junction. Give yourself permission to only care about getting there. When you arrive, pick the next one.
This isn’t self-deception — it’s cognitive load management. Big goals feel overwhelming mid-run. Small, achievable checkpoints feel manageable. Stack enough manageable moments together and you’ve finished the race.
A practical version: on a long run, break it into thirds in your head. The first third is finding your rhythm. The middle third is where you settle. The final third is where you run. Adjust your self-talk based on which third you’re in, not on the total distance remaining.
Use a mantra — but make it yours
Mantras get eye-rolls from some runners, and usually because they’ve tried “you’ve got this!” and found it hollow. That’s fair. The key is finding something that actually resonates with you, not something you read on a motivational poster.
Effective mantras tend to be short, rhythmically matched to your stride, and specific enough to feel true. Some examples:
- “Strong and smooth” — two syllables each, matches a left-right cadence, focuses on form rather than suffering
- “Stay in this” — useful when you’re spiralling ahead to miles you haven’t run yet
- “Pace, not panic” — helpful when discomfort is tempting you to back off or surge
- “You’ve done the work” — only effective if you actually have; but if you’ve followed your training plan, this one is true and grounding
Test mantras in training, not on race day. A mantra you’ve never used before mid-race is just noise. Use it on your harder training sessions — tempo runs, long runs over 16km — so it becomes a reliable anchor.
Focus on form when effort feels unbearable
When running gets hard, thinking about how you’re running gives your brain something purposeful to do instead of cataloguing the pain. It also genuinely helps, because fatigue causes form to deteriorate, and poor form makes every step harder than it needs to be.
Run through a quick mental checklist:
- Hands: Are you clenching? Shake them out briefly. Tension in your hands travels up to your shoulders.
- Shoulders: Are they up around your ears? Drop them deliberately.
- Lean: A slight forward lean from the ankles (not the waist) helps propel you forward efficiently.
- Cadence: If you’re shuffling and heavy-footed, try to shorten your stride slightly and increase turnover. Aiming for 170–180 steps per minute is a useful benchmark.
- Breathing: Slow it down and control the exhale. Research published by the British Journal of Sports Medicine has consistently linked breathing control to reduced perceived effort.
You can’t fix everything at once, but picking one thing to focus on for 60–90 seconds pulls your attention away from the discomfort and gives you something productive to do with it.
Disassociation vs. association — know when to use which
Sports psychologists distinguish between two broad mental strategies during hard effort:
| Strategy | What it is | Best used when |
|---|---|---|
| Association | Tuning into your body — monitoring breathing, form, effort, sensations | Racing, tempo runs, or when pacing is critical |
| Disassociation | Tuning out — music, podcasts, counting, scenery | Long easy runs, early miles before it gets hard, training runs where pace doesn’t matter |
| Chunking | Breaking the distance into small goals | Late miles of any hard effort — race or training |
| Mantra/self-talk | Verbal cues to maintain focus and confidence | Any point where motivation dips sharply |
| Form focus | Redirecting attention to technique | When pain is distracting and pace needs protecting |
Most runners default to disassociation — plugging in headphones and zoning out. That works fine until it doesn’t: when you’re racing, you need to be connected enough to pace yourself accurately and respond to how your body is performing. Training yourself to associate — to run without music sometimes, to check in deliberately — makes you a better-calibrated racer.
For a 20-mile long run in marathon training, a sensible approach might be: disassociate for the first 10 miles (listen to something, keep it easy), then switch off the podcast and associate for the final 10, practising the mental engagement you’ll need on race day.
Reframe discomfort — it’s not the same as danger
This is subtle but important. There’s a difference between hard and harmful. The burning in your legs on a tough climb, the heaviness in your chest at threshold pace, the general desire to be literally anywhere else at mile 19 — these are discomfort. They are normal. They are not a reason to stop.
Pain that is sharp, sudden, localised — a knee that suddenly worsens, an ankle that buckles, a stabbing sensation — is a different category entirely. That’s your body flagging something that deserves attention.
Training yourself to consciously categorise what you’re feeling changes how you respond to it. When you can say, “this is hard effort discomfort, not injury pain,” you give yourself permission to continue with more confidence. When it’s the latter, stop — and if you’re managing something ongoing, it’s worth reading up on how to identify the difference between normal running soreness and injury warning signs.
Build mental toughness in training — not just races
Mental resilience isn’t something you find on race day. You build it in the sessions you didn’t particularly want to do, the runs you completed when it was cold and dark and your warm sofa was a real option.
A few practical ways to build it deliberately:
- Run without music once a week. Force yourself to sit with the effort and your own thoughts.
- Do your hard sessions tired. Not exhausted — but occasionally doing a tempo run when you’re a little fatigued teaches you to push through resistance rather than always waiting for a perfect day.
- Set process goals, not just outcome goals. Instead of “I’ll run 10K in under 55 minutes,” try “I’ll maintain effort in the last 2K regardless of how I feel.” Process goals build the habit of finishing through difficulty, not just when it goes well.
If you’re following a structured plan — whether that’s a 16-week marathon training plan or a 12-week half marathon plan for beginners — the mental challenge of staying consistent over weeks matters just as much as any single session. Showing up on a bad day is its own form of mental training.
The honest takeaway
- Chunk it. Stop running the full distance in your head. Pick a near landmark, get there, pick the next one. This alone can get you through the hardest miles.
- Prepare your mantra before you need it. Test it in training so it’s a familiar anchor, not a last-minute invention. Two syllables per stride tends to work best.
- Form focus is a dual tool. It genuinely improves your running economy and gives your brain something to do other than process how much it hurts. Use it.
- Know the difference between hard and harmful. Discomfort during effort is normal and expected. Sharp, localised pain is not. Train yourself to make that distinction in the moment.
- Mental toughness is built in training, not summoned on race day. The runs you complete when you didn’t want to start are the ones that pay off at mile 20.
Next read: How to bounce back after a bad run