Exercise/PA levels have been shown to modulate immune response in different ways.  

University of Michigan - Ann Arbor

- Exercise/PA and changes to immune system in relation to COVID-19
- Exercise/PA and metabolic changes in relation to COVID-19
- Exercise/PA and cardiovascular changes in relation to COVID-19
- Exercise/PA implications on ACE2 expression in relation to COVID-19

Exercise/PA benefits and relation to COVID-19 pathophysiology

Nieman DC, Wentz LM. The compelling link between physical activity and the body’s defense system. J. Sport Heal. Sci. 2019. doi:10.1016/j.jshs.2018.09.009.

The compelling link between physical activity and the body's defense system

- Protection against oxidative stress and damage (in relation to ARDS)

Exercise/PA and metabolic changes in relation to COVID-19

Exercise/PA and changes to immune system in relation to COVID-19

COVID-19 pathology often includes changes to cardiovascular physiology, exercise/PA has a dramatic effect on the cardiovascular system as well, the relationship between the two could help identify individuals at higher risk.

Exercise/PA and changes to cardiovascular system related to COVID-19

- randomized, double-blinded, placebo-controlled physical training intervention that lasted 4 weeks
- expression of ACE2 mRNA in skeletal muscle and ACE2 serum concentration in 21 healthy men were measured
- treatment with or without Vitamin C and E in addition to exercise
- results showed an overall increase in ACE2 mRNA expression in skeletal muscle, but a decrease in ACE2 serum concentration
- this implied that the ACE2 mRNA in skeletal muscle does not play a large role in ACE2 serum concentration
-  limitations of this study included a small sample and the inability to use ACE2 mRNA measurements to measure ACE2 protein levels
- future research should focus on more directly related COVID-19 tissue with a larger, more diverse cohort
- regardless, it may be beneficial for those who are able to exercise and are at higher risk to incorporate more physical activity in thier daily lives

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