Latest articles


Why cutting running shoes in half is key to measuring midsole softness

Why cutting running shoes in half is key to measuring midsole softness

Disclaimer: For ease of understanding in the context of reviewing running shoes, we use the term "softness" instead of "hardness." In the RunRepeat lab, we ensure precise midsole softness measurements by first cutting the shoe in half. This approach enables us to apply the durometer directly onto the actual foam for getting accurate results. It's a costly process, especially as we purchase all our shoes without accepting any from brands, and that’s probably why every run[…]


The role of heel counters in running shoes

The role of heel counters in running shoes

The heel counter in running shoes is a semi-rigid, U-shaped piece, that snugly wraps around the heel. It stretches over the shoe's upper heel portion and typically includes two sidewall parts that extend forward beneath the medial and lateral malleoli. This component is crucial for stability because it locks down the rearfoot, and its design greatly improves the fit and comfort around the heel area, effectively preventing heel slippage even during uphill running. It also[…]


A runner's guide to choosing the right toebox

A runner's guide to choosing the right toebox

While the toebox might not be the most prominently featured aspect in the marketing of running shoes, it plays an essential role in determining the quality and comfort of your run. It's not just a matter of fit; the toebox can influence everything from the mechanics of your stride to the level of support and space your feet receive. In this guide, we will explore the subtle yet important details that establish the toebox as a crucial component of running shoes. You'll ga[…]


The definitive guide to running shoe breathability

The definitive guide to running shoe breathability

Breathability in running shoes it's a crucial feature that's often overlooked by both consumers and critics alike. At RunRepeat, we're convinced of the essential role of airflow—a view that is supported by this study as well. To provide you with the most accurate and comprehensive insights, we employ cutting-edge smoke tests for each pair of shoes that undergoes our lab tests. Additionally, we utilise a microscope and a powerful light to delve deeper into the structural[…]


All you need to know about rockered running shoes

All you need to know about rockered running shoes

Only a short while ago, running shoes had a simple design: mostly flat with a modest upward tilt at the toe. But then brands like MBT and Hoka, among others, revolutionised the scene with their unique maximalist rocker style. More and more shoe brands today are integrating the rocker design into their lineup. It’s evident that this isn't just a fashion trend—it's a design that genuinely works. Step into this guide with us as we dissect everything about rockered shoes, en[…]


How brands' heel-to-toe drop measurements differ from reality in running shoes

How brands' heel-to-toe drop measurements differ from reality in running shoes

Ever laced up a fresh pair of running shoes, taken your first strides, and felt that the promised heel-to-toe drop simply doesn't match reality? If you've ever found yourself in this situation, you're not alone. It's a scenario all too familiar for many runners and one that stems from a surprising fact: brands fail to accurately state the heel-to-toe drop of their running shoes. Sometimes, these discrepancies aren't minor—they can be as substantial as a whopping 168% dev[…]


Understanding the differences in men's and women's running shoes

Understanding the differences in men's and women's running shoes

Men's and women's shoes have different features. Though each aims to offer foot comfort and protection during runs, significant design and fit adaptations have been made over time to cater to the anatomical differences across genders. By understanding these variations, ranging from sizing nuances to alterations in width and shape, you can make informed decisions when choosing running shoes built to your unique requirements. Decision chart: How to make the right choice Ok[…]


In-depth insights into running shoe outsoles (road & trail)

In-depth insights into running shoe outsoles (road & trail)

The outsole, a vital part of any running shoe, forms your crucial link with the ground during your run. Not only does it help prevent slips and falls, but it also ensures a firm grip, offering the traction necessary for a safe and effective run. However, the importance of the outsole is often overshadowed by the advancements in midsole foams and cushioning technology. And it should not be overlooked, as the outsole plays a critical role in the success of a running shoe.[…]


The ultimate guide to running shoe foams

The ultimate guide to running shoe foams

Disclaimer: Due to the vast variety of running shoe foams currently available, some may be excluded (Chinese brands, entry-level or old EVA foams, etc). Please note that some foams may be released after the publication/updates of this guide and may not be included. Additionally, we will exclude non-foam cushioning systems, such as Air from Nike or GEL from ASICS. Running shoe companies aren't as transparent as we'd love, making it difficult for both casual and advanced r[…]


How much does the weight vary across different running shoe sizes?

How much does the weight vary across different running shoe sizes?

This guide would not have been possible without the help Running Warehouse Europe (and US). While we have hundreds of shoes in our lab at RunRepeat, obtaining the complete set of numbers for each shoe is a different story altogether. That's why we reached RW, as they were the clear choice to help us gather this crucial data. Thank you so much Running Warehouse! This guide delves into the world of running shoe weight differences, a factor often overlooked. While many migh[…]