The writer says a week before the event, begin increasing your carbohydrate intake gradually.

WITH the Comrades Marathon taking place on Sunday, thousands of runners from around South Africa and around the world will once again test their physical and mental limits in what is widely regarded as the world's greatest ultramarathon.

Whether you are a first time participant aiming to finish within the strict 12 hour cut off, an experienced runner chasing a personal best, or a seasoned veteran targeting a medal, your preparation during the final week can significantly influence your race day performance.

As a personal trainer and fitness professional who has personally overcome a hip replacement and three ankle surgeries, I understand that endurance events are not only about physical fitness. They are about preparation, discipline, resilience and respecting your body's capabilities.

The Comrades Marathon is an incredible challenge, but it is not for everyone. Participants should have a solid running foundation, appropriate training experience and medical clearance if they have any underlying health conditions.