houlahound
- 907
- 223
Some claim not possible naturally, ie beat 2 hours. While not possible under race conditions Nike is trying to see if it is humanly possible;
http://running.competitor.com/2016/...ram-break-2-hour-marathon-barrier-2017_160032
http://running.competitor.com/2016/...ram-break-2-hour-marathon-barrier-2017_160032