The dates mean Kirdyapkin remains eligible to defend his men's 50-kilometer title at the 2016 Olympics. Valery Borchin, an Olympic gold medalist in 2008, was banned for eight years from October 2012 for a second doping offense, while Vladimir Kanaykin was banned for life for a repeat offense.

The bans do not affect any Olympic medals, although five world championship gold medals and a silver medal from 2009 and 2011 may be re-awarded.

The world championship results affected are Kaniskina's 20K wins from 2009 and 2011, Borchin's 20K wins in 2009 and 2011, and Kirdyapkin's win in the 50K in 2009. In addition, Kanaykin could lose his 20K silver medal from 2011.

Further sanctions could still apply for Bakulin and Kirdyapkin after photos posted online appeared to show them competing at a Russian meet last month, when they were suspended pending the ruling.

The IAAF has said it is investigating both of them, and further sanctions could rule the pair out of next year's Olympics.

Kaniskina has retired and moved into coaching as head of Russia's training center, which appears to be in violation of her ban.

All five athletes' bans are based on the findings from their biological passports, which track anomalous blood values over long periods of time.

As well as their bans from late 2012, each of them has had results annulled for select periods of preceding years.

Those periods do not include the 2012 Olympics for any of the five athletes except for Borchin, who did not finish his only race at the London Games, the men's 20K.

In the case of Kirdyapkin, who won the men's 50K, his ban is written to allow his 2012 results from June 12 to Oct. 14 to stand, in between periods in which other results have been annulled.

Latest News from Sports News Desk