Realistic Improvement: for Next 10k

I've recently completed my first 10k race, which I ran in just under 1 hour and 13 minutes. I took some time off running after the race, but now want to get back into shape and train for another 10k. I'd like to try and improve my time for the next race, so my question is - what's a realistic new time to aim for?

Answer by Dom:
Hi there, thanks for your question.

First of all, congratulations on finishing your first 10K! That's a massive achievement, and it's brilliant that you're already thinking about your next race and how to improve.

Your question about realistic improvement is one I get asked all the time — and the honest answer is that it depends on a few factors: how much structured training you did before, how much you'll commit to this time, and how long you have until your next race. But here's the encouraging part — as a first-time improver, you have enormous potential when you train with purpose.

I'll break this down as follows:

1. Understanding realistic improvement percentages for your current level
2. The key training changes that'll make you faster
3. How to predict your goal time using training paces and time trials
4. Timeline expectations between races

1. Understanding Realistic Improvement Percentages for Your Current Level

Running 73 minutes for your first 10K puts you in a brilliant position for improvement. Working with runners at your stage is something I genuinely enjoy — because the gains, when you get the training right, can be very rewarding.

For someone at your pace, a 5–10% improvement is very achievable with consistent training over 12–16 weeks. That would put you somewhere between 65 and 69 minutes for your next 10K.

If you commit to structured training and can increase your weekly mileage meaningfully, improvements of 15–20% are possible for first-time improvers. That could get you down to around 58–62 minutes. I've seen runners go from 72 minutes to 58 minutes over a focused 16-week build — it absolutely happens when everything comes together.

But here's the key: these percentages assume you didn't do much structured training before your first race. If you already followed a proper 10K programme last time, your gains will be smaller — probably 3–7%.

The beauty of being relatively new to running is that your body responds quickly to training. You're not grinding for seconds like many sub-40 minute 10K runners are.

2. The Key Training Changes That'll Make You Faster

Your improvement will come down to how much more training you can realistically handle — so be honest with yourself about what you actually did last time versus what you're planning this time.

If you ran three times per week before, can you build to four sessions? If you were averaging 15 miles per week, could you progress to 25–30 miles? Your body will adapt to higher volume if you build gradually — the key word being gradually.

Your long run is crucial here. For a first 10K with the aim of finishing, your long run may have been around 5 miles. But when you're training for improvement, you'll want to eventually build up to runs that go well beyond the race distance — ideally 8–10 miles. This builds the aerobic base that makes 10K pace feel more sustainable on race day.

Once you've established that base over 6–8 weeks, you'll want to introduce some quality work. At your current pace, tempo running will give you the biggest return. Start with cruise intervals — 3 x 6 minutes at a comfortably hard effort with 2-minute recoveries. That's a solid place to begin.

I'd hold off on shorter, faster intervals until later in the training cycle. Intervals do sharpen your pace and can give you a better finish kick — but it's the easy runs and tempo work that make you structurally faster. Your 10K is currently run at what most people would call tempo pace, so that's where you need to get comfortable first.

3. How to Predict Your Goal Time Using Training Paces and Time Trials

About 2–3 weeks before your race, I'd recommend doing a 5K time trial or finding a local parkrun. Your 5K time is a solid predictor of your 10K potential — and you can plug it straight into my race conversion calculator to work out a realistic target.

You can also use your training paces as a gauge. Pay attention to what feels "comfortably hard" during your tempo sessions — that effort is very close to your 10K race pace. If your tempo pace is sitting around 10:30 per mile during training, you're probably capable of racing somewhere around 10:15–10:20 per mile — tempo pace is normally 10-15 seconds per mile slower than 10K race pace, not faster — which translates to roughly 64 minutes for the 10K.

In the final 4–6 weeks of your training block, it's worth doing some goal pace sessions as well. Try 3–4 x 1 mile at your target 10K pace with 2–3 minute recoveries. If that feels manageable, your goal is becoming realistic rather than just hopeful.

4. Timeline Expectations Between Races

You're eager to race again — which is great — but this is where patience really pays off. Give yourself a proper 12–16 week build-up. Anything shorter and you're leaving improvement on the table.

The first 4–6 weeks should focus purely on building your aerobic base: easy running, gradually increasing mileage, and letting your body adapt to more volume. From weeks 6–12, add tempo work and longer runs. This is the phase where you'll start feeling noticeably fitter.

The final 3–4 weeks are about sharpening — some goal pace work, a gradual taper, and race preparation.

If you've only got 8–10 weeks until your next race, you can still improve, but I'd temper expectations to perhaps 3–5% rather than the bigger gains mentioned earlier. Too many runners rush back into racing and run disappointing times simply because the training didn't have time to take effect.

Be honest about where your fitness is right now versus where it was before your break. If you've lost some conditioning during your time off, factor that into your planning. Since you're still building your running foundation, the beginner running tips guide is worth a look as you plan your approach.

With dedicated training and honest goal setting, you've got real scope to bring that 10K time down significantly. Best of luck with your preparations!

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