Transport for London (TfL) commissioned the study across eight lines to examine the levels of pollution. Across the lines, elevated particulate matter concentrations were reported.
EXCLUSIVE: Millions of Londoners could be exposing themselves to potentially harmful levels of carcinogenic particles - with readings at one underground station higher than a brick factory
More research points to the benefits of plyometrics for performance, calling out hopping on two feet for five minutes a day as a way to boost running economy.