How is exercising while sheltering in place helping to keep us safe from the corona virus?

I was asked by a client to awnswer this question.

How is exercising while sheltering in place helping to keep us safe from the corona virus? Eating well, sleeping plenty, taking supplements if we choose - all of that builds up our immunity, I understand. Specifically, what is exercising doing for our immunity? Or is it just keeping us strong so that if we do get sick, we have a better starting place from which to fight?

1. Exercise helps decrease your chances of developing heart disease. It also keeps your bones healthy and strong.

2. Physical activity may help flush bacteria out of the lungs and airways. This may reduce your chance of getting a cold, flu, or other illness.

3. Exercise slows down the release of stress hormones. Some stress increases the chance of illness. Lower stress hormones may protect against illness.

4. Exercise is good for you, but, you should not overdo it. People who already exercise should not exercise more just to increase their immunity. Prolonged bouts of strenuous exercise have been shown to result in short term depression of white blood cell functions and can create an “open window” of decreased host protection, during which viruses and bacteria can increase the risk of developing an infection. (See J-shaped curve)