in all these "scientific" studies, never there is a clear idea about the performances that can be achieved by CLEAN athletes, and when somebody is able running faster than the IDEA of the limit (in the mind of the "believers" in doping), the same researchers are not able to explain WHY, so arrive to the wrong conclusion that are doped, not still caught.
I work on the ground, with the athletes, every day. There are coaches that I respect, not because are my friends, but because I know their passion, their knowledge and their ethic. For example, Patrick Sang and Brother Colm. These coaches are always in touch with their athletes, who are not "free dogs", but professional runners staying together in a well structured training camp, with full control and full assistance. The same happens now, and happened in the past, with the athletes I coached, helped in the past by Peter Matu (who for two years was the head coach of Kenya, too), and in the last two years by John Litei, all persons very strict, with big values, and passion for athletics (not for money).
Now, I want to give you a list of CLEAN athletes we coached, for every event.
800m (under 1:43.50)
1:40.91 David Rudisha London 09.08.2012 Brother Colm (WR)
1:43.03 Kennedy Kimwetich Stuttgart 19.07.1998 Renato Canova
1:43.12 Wycliffe Kinyamal London 22.07.2018 Patrick Sang
1:43.33 Joseph Mutua Zurich 16.08.2002 Renato Canova
1:43.40 Leonard Kosencha Monaco 20.07.2012 Renato Canova
1500m (under 3:30.50)
3:27.64 Silas Kiplagat Monaco 18.07.2014 Renato Canova
3:28.81 Ronald Kwemoi Monaco 18.07.2014 Renato Canova
3:29.47 Augustine Choge Berlin 14.06.2009 Brother Colm
3:29.50 Caleb Ndiku Monaco 19.07.2013 Renato Canova
3:29.77 Nixon Chepseba Monaco 20.07.2012 Patrick Sang
3:30.34 Collins Cheboi Monaco 17.07.2015 Renato Canova
Mile (under 3:50.00)
3:47.88 Silas Kiplagat Eugene 31.05.2014 Renato Canova
3:47.97 Daham Bashir (David Nyaga) Oslo 29.07.2005 Renato Canova
3:49.04 Ronald Kwemoi Eugene 27.05.2017 Renato Canova
3:49.56 Collins Cheboi Eugene 31.05.2014 Renato Canova
3:49.77 Caleb Ndiku Eugene 04.06.2011 Renato Canova
3000m (under 7:31.00)
7:27.55 Edwin Soi Doha 06.05.2011 Renato Canova
7:27.66 Eliud Kipchoge Doha 06.05.2011 Patrick Sang
7:28.28 James Kwalia Bruxelles 03.09.2004 Renato Canova
7:28.72 Isaac Songok Rieti 27.08.2006 Brother Colm
7:28.73 Ronald Kwemoi Doha 05.05.2017 Renato Canova
7:28.76 Augustin Choge Doha 06.05.2011 Brother Colm
7:30.09 Thomas Longosiwa Doha 08.05.2009 Renato Canova
7:30.15 Vincent Chepkok Doha 06.05.2011 Patrick Sang
7:30.76 Jamal Bilal Salem (Katui) Doha 13.05.2005 Renato Canova
7:30.99 Caleb Ndiku Stockholm 17.08.2012 Renato Canova