Aleksandr holds basically all the ultramarathon World Records from distance run in 6-hours all the way up to 24-hours, which include both the 100km and 100 mile World Records. He is a World Champion at the 24-Hour event, and won the historic Spartathlon. He began running later in life to lose weight and kick a drinking and smoking habit, and is now considered one of the greatest ultramarathon runners of all time.

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