Help To Improve My 2.4k: Getting Started When Unfit

I need help to improve my run. I'm UNFIT and ran the 2.4k, walking, running and barely made it. It took 18 mins to finish.

Is it because I'm overweight too? I weigh 125 kgs.

– Mo

Answer by Dom:
Hi Mo, thanks for writing in — and I want to say straight away that the fact you finished the 2.4k is the starting point, not a failure. Running 18 minutes with a mix of walking and running at 125kg is a real effort. Now let's talk about how to improve it. Yes, your weight is a factor — I'll address that honestly in a moment — but the biggest factor right now is your training approach. Here's what I'd do:

1. Start with run/walk — not running
2. Build progressively over three months
3. The weight question — honest and encouraging

Start with Run/Walk — Not Running

The single most useful thing you can do right now is adopt a structured run/walk approach. This isn't a workaround for "real" running — it's the smart entry point when your body isn't yet conditioned for continuous running. It protects your joints, keeps injury risk low, and allows your cardiovascular system to adapt without overwhelming it.

Here's a session to start with: run for 30 seconds, walk for 2 minutes, and repeat that cycle for 25 minutes. That's roughly 10 running intervals in a session. Do this three times a week, with at least one rest day between sessions. Your body needs recovery time to adapt, especially at the beginning.

Run on soft surfaces as much as possible — grass, a running track, or a treadmill. Tarmac is hard on the joints even for lighter runners; at 125kg it significantly increases your risk of shin splints and knee pain. The Beginner Running Program 3 on this site uses exactly this kind of progressive run/walk structure and is worth reading for more detail. The Beginner Running section has more context on getting started safely.

Make sure you have proper running shoes. Not fashion trainers, not old gym shoes — actual cushioned running shoes fitted by someone who knows what they're doing. At your weight, the right footwear is not optional; it makes a real difference to both comfort and joint protection.

Build Progressively — What the Next Three Months Looks Like

The original answer I want to give you is simple: be patient and progressive. Here's what that looks like month by month.

Weeks 1–4: The run/walk sessions I described above. Your goal in this phase is simply to get three sessions done per week, consistently. Don't worry about pace. Don't worry about distance. Consistency is the only metric that matters right now. By the end of week four, try to extend your running intervals from 30 seconds to 1 minute, with 90 seconds walking in between.

Weeks 5–8: Extend the running intervals. Go from 1 minute of running to 2 minutes, then 3 minutes, with shorter walking breaks. By week eight, aim to run for 5 minutes continuously before walking. Five minutes of continuous running might feel a long way away right now. It isn't. You'll be surprised how quickly this moves once your body starts adapting.

Weeks 9–12: Work toward running the full 2.4k without stopping. By now your walking breaks should be short (30 seconds) and infrequent. When you can run 2.4k without stopping — even slowly — you have the base to start working on the time. Once you can do that, build up to running a 5-miler. When you can run 5 miles easily, running a fast 1.5 miles or 2.4k becomes a very different proposition. That's the long game, Mo, and it works.

The Weight Question — Honest and Encouraging

Yes, Mo — the extra weight does make running harder. Every extra kilogram you carry over 2.4 kilometres adds effort. That's just physics and there's no point pretending otherwise. But here's the important part: running is one of the best tools available for losing weight, which means the very thing you're doing to improve your time will also address the thing making it harder. That's a positive loop, not a vicious one.

Don't wait until you've lost weight to run. Start running to lose the weight. Even modest weight loss — 5–10kg over three months of consistent training — will make a noticeable difference to how running feels and how fast you go. Combine the training with straightforward eating habits: reduce processed food, cut alcohol, eat proper meals with protein. You don't need a complicated diet plan — just consistent, sensible food choices alongside consistent, sensible training.

What I want you to take away from this, Mo, is that 18 minutes at 125kg is the starting point, not the ceiling. Keep at it and that time will come down faster than you expect.

Best of luck.
Kind regards,
Dom

Frequently Asked Questions

How long will it take to significantly improve my 2.4k time?

With consistent training three to four times a week, most beginners notice meaningful improvement within six to eight weeks. Going from 18 minutes to under 14 minutes realistically takes three to four months of progressive run/walk training. Be patient — the improvements feel slow at first, then they accelerate.

Should I run every day or take rest days?

Take rest days. At the beginning, running three days a week with rest days in between is plenty. Your body needs time to adapt and recover, especially when starting from a low base. Running every day as a beginner dramatically increases your injury risk.

Is it safe to run at 125kg?

Yes, but with sensible precautions. Run on soft surfaces — grass, a running track, or a treadmill — rather than tarmac, to reduce joint impact. Start with short intervals of running rather than continuous running. Make sure your shoes have good cushioning. If you feel knee or shin pain that doesn't go away, take a few days off and consider seeing a physio.

What kind of shoes should I wear?

Go to a specialist running shop and ask to be fitted properly. At 125kg, you need a shoe with good cushioning and support. Don't run in old trainers or fashion shoes — the right footwear makes a significant difference both in comfort and in reducing injury risk.

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