Flu shots boosted by exercise

April 23, 2013

(Medical Xpress)—Exercising at the time of having a flu shot may increase the success of vaccination according to a University of Sydney researcher.

While having a is considered a great way to lessen your odds of catching the disease, they don't work for everyone but Dr Kate Edwards from the Faculty of Health Science's and Sport Science unit believes exercise is the key to successful vaccination.

Being physically activity has been found to improve immunity in general, but specifically doing some exercise immediately before or after a vaccination can boost response in particular, says Dr Edwards.

In a commentary published in this month's Human Vaccines and Immunotherapeutics and co-authored by vaccine guru Professor Robert Booy, Dr Edwards advises that a bout of exercise can bring about profound changes in the immune system, such as increasing circulating cell numbers, with specific increases in certain subsets, and the release of immune messenger proteins by working themselves.

With vaccine success rates sitting around 50 to 70 percent, a large number of those vaccinated are receiving minimal benefit, which is often mentioned as a reason not to get the jab. People also avoid flu shots because of like headaches and soreness.

But physical activity after a shot might not only make the vaccine work better, it might protect them from some side effects as well. "We are almost certain that exercise can help vaccine response by activating parts of the immune system that means it's ready to respond when the vaccine is administered," says Dr Edwards.

Dr Edwards cites a study conducted by scientists at the Iowa State University in the USA that showed mice who ran leisurely for about half an hour after vaccination showed maximum resistance to any side effects of the . Conversely the mice who were sedentary and the ones who indulged in extreme exercises succumbed to the side effects.

Dr Edwards acknowledges that our bodies react in different ways and advises people not to overdo physical activity after a flu shot but engage in moderate activities such as cycling, or resistance exercise and avoid dehydration by drinking plenty of fluids.

More information: www.landesbioscience.com/journals/vaccines/

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