As if we need another reason to exercise, scientists have found that exercise boosts the immune systems of mice and helps them fight off the flu. Mice that were exercising regularly didn’t get as sick as non-exercising mice when they were all exposed to a flu virus.
In addition, mice that started exercising right before they were exposed to the virus also didn’t get as sick. In other words, it’s never too late to start exercising. It’s good for your health all around.