Japanese woman sets W60 world record with 2:52 marathon in Osaka

Mariko Yugeta took four minutes off her previous age group record to finish in the top 50 at Sunday’s race

Jenny Hitchings’ 2:50:36 at NYC Marathon was a W55 world record

The California runner now has an age group world record to add to her five American age group records

81-year-old makes the cutoff at 1,000K race in South Africa

Don Winkley of Corpus Christi, Texas has held two age-group world records in ultrarunning