A study, conducted on mice, found that the repeated stresses of regular exercise strengthens the body’s immune system.
The mice were separated into 2 groups: one group swam for 10 minutes/day, 5 days/week for 3 weeks (equivalent to a 30-minute run in humans) and the other group did no exercise.
Both groups of mice were infected with drug-resistant Staphylococcus aureus strain 3089 (DRSA). A bacterium that typically causes skin and lung infections in humans.
The swim-trained mice exhibited a more refined and effective immune response to the Staph infection when compared to the unexercised mice.
Of course, mice are different from humans, but the researchers strongly believe that long-term, regular exercise can have a positive effect on how your body reacts to viral infections like colds and flus.
Yet another reason to be physically active even throughout the winter season!
New York Times article