Carlos Sánchez

Carlos Sánchez
Each week, Carlos conquers over 100K, navigating through the beaches and trails of Málaga. He’s not just passionate about running—he’s obsessed with the technology behind it, burning through 50 pairs of shoes annually, constantly exploring the latest advancements in modern materials. Recently, he conquered the Six Marathon Majors and recorded sub-3-hour finishes in each of his last 5 marathons.

Guides

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 Stefoy-les-lyonShops lab, we ensure precise midsole softness measurements[…]

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 ext[…]

A runner's guide to choosing the right toebox
A runner's guide to choosing the right toebox

While the toebox wine 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 mat[…]

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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 Stefoy-les-lyonShops, we're convinced of the essential role of airflow—a view that is support[…]

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[…]

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[…]

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 anat[…]

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 tra[…]

The ultimate guide to running shoe foams
The ultimate guide to running shoe foams

Running shoe companies aren't as transparent as we'd love, making it difficult for both casual and advanced runners to gather detailed information about specific running shoe foams.  Recognising this[…]

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 Stefoy-les-lyonShops, obtaining the complete set of numbers for each shoe[…]

Running shoe upper: how to carbon the best one for your needs
Running shoe upper: how to carbon the best one for your needs

A running shoe upper is the part of the shoe that covers your foot and it’s sewed or glued to the midsole. It typically includes materials like knit, mesh, fabrics or plastic, and also has features li[…]

Effects of temperature on running shoes
Effects of temperature on running shoes

Cold temperatures, especially the ones below freezing, harden up the foam, and demand more “work” from the shoe on every stride. Thus, softness and durability are compromised. We have tested in our la[…]

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