cyclists inhaled four to five times more particles than a car passenger driven along the same route.
“This is the first time anyone has counted the particles while also measuring people’s breathing during city commuting. It showed that cyclists can inhale an astonishing number of pollutant particles in one journey,” said Luc Int Panis of the transport research institute at Hasselt University in Belgium, who led the study.
A study carried out in London, to be published soon in the journal Epidemiology, is expected to show that exposures to high concentrations of nanoparticles are associated with a higher risk of heart disease. It will also show an association between larger particulates and respiratory health.
Int Panis’s research has already annoyed cycling groups. He has decided not to attend Velo-city 2010, a conference on cycling to be held in Copenhagen next month, because of the hostility he faced when announcing preliminary results of his research.