From classroom to finish line: retired teacher to complete six world marathons

Marta Mixa is running the iconic TCS London Marathon for World Cancer Research Fund – earning all six stars from the original Abbot World Marathon Majors series (the world’s most prestigious long-distance running events).

Born in San Salvador and a US citizen for 40 years, Marta began her six-star journey back in 2019 with the New York City Marathon. After qualifying Boston and Chicago and running Berlin in the same year, Marta went on to complete three World Marathon Majors in 2022 alone.

In 2024, she crossed the finish line once more, completing the Tokyo Marathon and bringing herself one step closer to the iconic medal. Now more determined than ever to conquer the programme, Marta registered for the TCS London Marathon in a bid to earn her sixth and final star.

Fundraising for cancer prevention research is important to Marta after losing her aunt to breast cancer in 2024.

“She fought until the very end, but cancer stole her life, leaving three children, grandchildren, and her great grandchildren behind”, Marta shared. “It was really hard because she was the first family member that ever passed away from cancer.”

Marta’s sister-in-law, Sue, was also diagnosed with cancer in another devastating blow for the family.

“Sue was a vivacious, strong woman who loved the great outdoors and lit up every room. She fought for six long years and it was hard to see her go.”

Driven by her loss, Marta committed herself to not only support cancer research but to embracing a healthier lifestyle – which is proven by science to reduce risk of cancer along with many other conditions.

Marta’s love of running began in her late thirties, and over the past six years, she has completed 15 marathons. She credits her strength and endurance in her sixties to a balanced, nutrient-rich diet.

“The right protein is so important, together with carbohydrates. Carbs give you energy, and protein keeps you strong. I try to incorporate lots of fruit and vegetables into my diet, as well as lean protein such as salmon and chicken”, Marta explained.

World Cancer Research Fund’s UK Director, Steve Greenberg, commented:

“Marta is an unstoppable force, and her dedication to funding life-changing research is truly inspirational. Her active lifestyle and balanced diet echos our Cancer Prevention Recommendations, which help people live longer, healthier, and happier lives free from the devastating effects of cancer. She embodies everything that World Cancer Research Fund is about, and we are truly grateful for her support.”

For Marta, the journey has always been about more than medals.

“My motivation is letting others know they can do it too. Your age doesn’t matter”, she explained. “Stay strong, stay fit, stay healthy. Your body will thank you for it.”

You can show Marta your support by donating or sharing her story at the link below: