Doping: Marathon organizers invest heavily in 'intelligent' testing

Jemima Sumgong of Kenya celebrates as she crosses the finish line to win the Women Marathon race in the 2016 Rio Olympics in Brazil [Reuters]

The organizers of six of the world’s most prestigious marathon races are spending a six-figure sum on an “intelligent”, targeted anti-doping program in an attempt to root out cheats.

The Abbott World Marathon Majors, which groups six of the world’s best-known races, says the lucrative rewards on offer in road racing make it especially vulnerable to doping.