Hard exercise reduces flu risk - but gentle exercise makes little difference
Doing at least 2.5 hours a week of activity that leads to sweating or hard breathing reduces flu or flu-like illness by around 10%
Taking part in vigorous exercise - such as running, fast cycling or rugby - cuts the risk of catching flu by around 10%, research suggests.
Doing at least 2.5 hours a week of activity that leads to sweating or hard breathing reduces flu or flu-like illness, the analysis found.
More gentle pursuits, such as walking or light jogging, were found to have little effect.
Experts at the London School of Hygiene and Tropical Medicine examined data from its online flu study, Flusurvey.
They found overall flu levels across the UK appear to be down on last year, with the flu season apparently curbed by a lack of illness among children and young people.