Major sportswear brands including Nike, Adidas and Asics have been accused of taking insufficient action in recent years to improve wages and working conditions at their suppliers' factories.

Despite "making positive statements at the time of the 2008 Olympics about cleaning up an industry rife with worker rights violations", worker rights group the Clean Clothes Campaign (CCC) says it has seen almost no change.

Now, as the 2010 Winter Olympics approach, the CCC and other labour rights organisations have launched a new website called Clearing The Hurdles to rate the commitments companies have made to improving the welfare of sportswear workers.

"We've taken stock of what companies like Nike, Adidas, Asics and others have done to deal with issues like poverty wages and repression of the right to unionise and it's clear that almost no steps forward have been made since Beijing 2008," said Jeroen Merk of the CCC International Secretariat.

"Responsible corporate behaviour means implementing a living wage for workers and ensuring that they can safely speak out when they have workplace grievances. So far, we're still waiting."

An online advertising campaign has also been unveiled to draw attention to what is seen as the failure of the sportswear industry to address ongoing labour problems in the production of their merchandise.