Walks in winter can prevent flu by boosting immune system

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It’s not just a flu shot which can help prevent you from getting sick in the winter.

According to a new study, a brisk walk on a cold day can boost your immune system and reduce the chance of you catching a cold by up to 30 per cent.

However, that comes with a warning – don’t overdo it.

British researchers found that prolonged strenuous activity, such as running a marathon, makes you between two to six times more likely to contract an upper respiratory illness, such as a cold, flu or sinusitis.

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