Olsson: Swansea are 'working much harder on the pitch' under Carvalhal

Mail Online -

Mail Online—The application levels of some Swansea players were questioned towards the end of Clement’s reign and during Britton’s interim tenure and Olsson admits Carvalhal has increased the demands.

Pharmaceuticals and other contaminants force fish to work much harder to survive. Pharmaceuticals and other man-made contaminants are forcing fish that live downstream from a typical sewage treatment plant to work at least 30 per cent harder just to survive, McMaster researchers have found.