How marathon records have improved as Eliud Kipchoge runs distance in under two hours | Guinness World Records
Patrycja Bereznowska Sets 48-Hour World Record – iRunFar
Ultra runner Aleksandr Sorokin breaks world record 100 mile and twelve hours running - Triathlon Today
Numerous world records holder,... - Al Marmoom Ultramarathon | Facebook
Meet Aleksandr Sorokin, the man behind the new 24-hour world record - Canadian Running Magazine
Ultramarathon - Wikipedia
Kenya's Brigid Kosgei Breaks Marathon World Record - The New York Times
Ketema Negasa broke the men's 50km world record, running 31 miles in 2:42:07
Kenyan breaks 10K, 15K, 20K and half-marathon world records in same race - Canadian Running Magazine
Camille Herron to attempt overall U.S. 48-hour record this weekend - Canadian Running Magazine
Sania Sorokin Sets New World Record After Running 309.4KM In 24 Hours
72h World Record - race recap – Hold The Carbs
The Marathon WORLD RECORD PROGRESSION || The Road to 1:59! - YouTube
85-Year-Old Breaks Age Group World Record in 5K - FloTrack
Aleksandr Sorokin Smashes 24-Hour World Record With 198.6 Mile/319.6 Kilometer Run – iRunFar
How Ultrarunner Camille Herron Set Another World Record - The New York Times
American Women's 48-Hour Record - Marisa Lizak Sets the 48-Hour Record
How Aleksandr Sorokin Ran 100 Miles at a 6:31-Mile Pace - Outside Online
Marisa Lizak runs 391K in 48 hours, sets new American record - Canadian Running Magazine
IAU World Records (IAU WR) - IAU - International Association of Ultrarunners
24-hour run - Wikipedia
Half marathon world record progression - Wikipedia
72h World Record - race recap – Hold The Carbs
