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27 August 12:00 AM

Physical exercise helps old people to keep their immune system young

Scientists urged old people to do a lot of exercise to keep their immune system working well.

Doing lots of exercise in older age can prevent the immune system from declining and protect people against infections, scientists say.

They followed 125 long-distance cyclists, some now in their 80s, and found they had the immune systems of 20-year-olds, the BBC reported.

Prof Norman Lazarus, 82, of King's College London, who took part in and co-authored the research, said: "If exercise was a pill, everyone would be taking it."

"It has wide-ranging benefits for the body, the mind, for our muscles and our immune system."

 The research was published in the journal Aging Cell. 

Prof Janet Lord, director of the Institute of Inflammation and Ageing, at the University of Birmingham, and co-author of the research, said: "The immune system declines by about 2-3% a year from our 20s, which is why older people are more susceptible to infections, conditions like rheumatoid arthritis and, potentially, cancer.

"Because the cyclists have the immune system of a 20-year-old rather than a 70- or 80-year-old, it means they have added protection against all these issues."

The researchers looked at markers in the blood for T-cells, which help the immune system respond to new infections.

These are produced in the thymus, a gland in the chest, which normally shrinks in size in adulthood.

 

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