How to choose running shoes for a marathon based on your weight and pace
Choosing the right shoes for a marathon isn't just about brand or feel; it's a decision that can make the difference between finishing strong and suffering from mile 18. And while cushioning, stability, and carbon plates are always discussed, two factors that directly affect performance and often go unnoticed are your weight and your running pace.
Not all runners need the same type of shoe. In fact, a poor choice can lead to discomfort, overuse injuries, loss of efficiency, or even more serious injuries. So, if you're preparing for a marathon and want to choose the right footwear for long distances, here's the ultimate guide to getting it right the first time.
Why does your weight matter when choosing marathon shoes?
When we talk about weight, what's important is not the exact number but the impact your joints bear and how midsole compression is affected. A heavier runner needs a foam with greater consistency, more rebound, and more support to prevent the shoe from sinking. Conversely, a lighter runner can opt for softer, more flexible, and pace-oriented shoes.
Lightweight runners (<70 kg)
They tend to adapt better to soft and compressible foams; and can better leverage the responsiveness and efficiency of shoes with carbon plates. Additionally, they have more room to choose lighter models or those with higher profiles without sacrificing stability.
Medium-weight runners (70 – 85 kg)
They need a balance between cushioning and support. Foams that are too soft can fatigue quickly, especially at medium paces, and plated shoes do work but must have heel stability.
Heavier runners (>85 kg)
They require models with firmer and more stable cushioning. The foams must maintain their structure even after 30 km, and if the model has a wide base and consistent chassis, it is the safest option for a marathon.
How to choose shoes for the marathon based on your pace
Another key factor is your target race pace, because running at 4:00/km is not the same as running at 6:00/km.
Fast paces (3:20 – 4:15/km)
- This is where carbon plate shoes and PEBA or ZoomX foam excel, boosting your stride.
- Lightweight models, with good responsiveness, designed to maximize efficiency.
- Perfect for experienced runners who want to improve their time.
Medium paces (4:30 – 5:30/km)
- They need a balance: moderate responsiveness and consistent cushioning.
- Hybrid shoes or premium training shoes are perfect.
- When using a carbon plate, it's best to buy stable and easy-to-wear models.
Slow paces (5:40 – 6:30/km)
- The priority is comfort and protection.
- Denser foams and stable chassis to prevent muscle fatigue.
- Training shoes with high profiles and good cushioning.
Combining weight and pace: which shoes to choose?
If you combine these two factors, weight and pace, very clear profiles begin to emerge. For example, a runner over 80 kg who wants to finish the marathon at a steady pace between 5:00 and 5:30 min/km will need a stable, well-cushioned shoe with a durable foam and no "excessive" stiffness. Something comfortable, reliable, and designed to withstand the impact of long distances without compromising technique. On the other hand, a lightweight runner looking to break 3 hours will be able to take advantage of the efficiency of a carbon plate and more radical geometries that favor a quick transition.
There is also an intermediate case: medium-weight runners (65–75 kg) who run at paces between 4:30 and 5:00. Here the choice is more flexible, and models that combine good cushioning with a bit more responsiveness usually work well. This group has the most variety, which is why it can sometimes be difficult to choose.
An important point is that marathon shoes are not chosen just by thinking about "race day." Ideally, you should test them on long runs, verify that your foot fits well in the upper, that stability is not compromised when you start to fatigue, and that the cushioning holds up after 20 km. A very common mistake is to choose overly soft or too reactive models without checking how they respond at your actual race pace.
