Usain Bolt is being failed by Jamaican athletics chiefs, according to US Anti-doping Association boss Travis Tygart.

Jamaican athletics has recently come under global pressure to revamp its under-fire drugs testing regime following a number of high-profile cases.

And USADA chief executive Tygart believes the Jamaica Athletics Administrative Association’s lack of action only serves to condemn stars like Bolt to doubts and scrutiny of his stunning sprint record.

Tygart has long since been lobbying the JAAA for change and warned Bolt will continue to suffer unfounded rumours and accusations until a robust testing policy is in place.

“Absolutely it lets him down,” said Tygart of Jamaica’s lacklustre anti-doping policy.

“It’s really unfair to question athletes’ performances just because of an inspiration story or whatever it may be, there’s a legal process for that.

“That said, it happens unfortunately, and I think it’s really unfair to those athletes that it does happen.”

Sprint supremo Bolt’s 9.58seconds world-record time over 100 metres and his 19.19s 200m landmark set him apart for intense scrutiny around the world.

Tygart said athletes should not have to spend their entire careers batting away unsubstantiated accusations simply because of supreme performance.

And that is where he has called for first-class anti-doping regulations to end such arguments once and for all.

Tygart criticised Jamaican athletics bosses for failing to give Bolt and his team-mates the means with which to dispel question marks over outstanding performances.

“Those athletes ought to be able to stand up, and in addition to being able to say they are clean, also have people believe that.

“Furthermore they ought to be able to say ‘I am held to the highest standard, so there’s some credibility and cooperation behind my statement that I am clean’.

“And that’s where athletes are being let down by the Jamaican authorities.”