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400m hurdles star Sydney McLaughlin-Levrone is far from done with her pet event as she focuses on 400m flat for world championships.

At 92, Emma Maria Mazzenga defies age, breaking track records and captivating scientists. Her muscles resemble those of a much younger person, boasting endurance fibers of a 20 - year - old. Researchers attribute her exceptional fitness to a blend of her genetics and a mostly active lifestyle she is living.