Have you ever wondered why running shoes have extra holes at the top? How many of you people use those? Well, I don't. It's one of those little mysteries that most of us have in our lives. No, it's not a not a design flaw. And of course, it's not for ventilation.

Turns out those eyelets serve an important purpose.

Source: Youtube

The trick is to create 'heel lock' or 'lace lock' with those extra holes which creates extra friction between the laces at your ankle.

Check out the video to know how it's done:

Source: Youtube

This actually ensures the shoelaces stay tied together, making the shoes fit better and thus preventing blisters. And that's how you can run in a safer and a more relaxed way!

via GIPHY

Wish I'd known this earlier!

Feature Image Source: 1st Elite

Masthead Image Source: Business Insider