Mariam Kareem Leads Into the World U20 400m Hurdles Semis

An 18-year-old from the UAE just clocked the fastest time in the world to reach a global semi-final. Emirati athlete Mariam Kareem qualified quickest for the women's 400m hurdles semi-finals at the 2026 World Athletics U20 Championships in Eugene, Oregon, winning her heat in 57.87 seconds — just 0.02 ahead of Germany's Rebekka Feirle. If you have ever run a hard lap of the track and wondered what it takes to run a fast 400, her race is a perfect window into it.

What she did

At Hayward Field — one of the sport's most storied tracks — Mariam Kareem won her heat in 57.87 seconds to lead all qualifiers into the semi-finals of the women's 400m hurdles. She edged Germany's Rebekka Feirle by two hundredths of a second. Kareem is already a decorated junior, having been named the Best Asian Under-18 Female Athlete for 2025, and UAE Athletics praised her hurdle technique and the way she distributed her effort across the race.

Why the 400m hurdles is so brutal — and so instructive

The 400m hurdles is often called the hardest event in athletics: a near-full-speed 400m run with ten barriers in the way, each one demanding rhythm and a precise stride pattern while your legs fill with fatigue. It combines raw speed, endurance, mobility and nerve. You do not need to race hurdles to borrow from how these athletes train — the same ingredients build anyone's engine: intervals, sprint mechanics, hip mobility and strong, springy legs.

How to train like a 400m runner, at any level

The good news for everyday runners is that the recipe scales down cleanly. Short, hard efforts with full recovery build the anaerobic engine a fast 400 relies on. Drills from an exercise library sharpen your sprint mechanics and hip mobility, a personal trainer can structure your intervals so you get faster without getting hurt, and if you are a student chasing your own times, a student membership keeps serious training affordable.

Ready to find your top gear?

You will not run 57 seconds this week, and you do not need to — the point is the process. If Mariam Kareem's race has you itching to move faster, try a HIIT class at GymNation and put your own engine to work. Sprint-style intervals are one of the quickest ways to feel fitter, whatever your starting line.

Sources:
worldathletics.org
alkhaleej.ae

The opinions shared in the GymNation blog articles are solely those of the respective authors and may not represent the perspectives of GymNation or any member of the GymNation team.