Nigerian sprinter Blessing Okagbare has been banned for a total of 10 years for multiple breaches of anti-doping rules, the Athletics Integrity Unit (AIU) said Friday. The 33-year-old Okagbare, who has an Olympic silver medal in long jump from the 2008 Beijing Games, was provisionally suspended before the 100 metre semi-finals at the Tokyo Olympics last year. An AIU statement said the sole arbitrator adjudicating the case concluded that Okagbare’s “use of multiple prohibited substances” was “part of an organised doping regimen in the lead up to the Tokyo Olympic Games.” This “egregious conduct…