The women's 800m world record, held by Jarmila Kratochvilova since 1983, has not been broken in 43 years. Despite advancements in shoe technology and nutrition, the record remains intact.

Great Britain's Keely Hodgkinson, one of the top middle-distance runners, is competing at the European Athletics Championships. Her time of 1:54.87 is the sixth-fastest in history, but still far from Kratochvilova's record. Read more racing coverage.

Innovations in sports science have improved athletes' performance, but the 800m record remains elusive. Experts suggest better shoe technology and understanding of nutrition have contributed to faster times. Related: Hodgkinson Second Favorite for 800m Gold in Birmingham.

This original Runner World brief is based on reporting from BBC Sport Athletics. Visit the source for its complete reporting, context and any later corrections.