Given that my understanding is that most people, even those who are vaccinated, will at some point in the coming months be infected with Omicron (this is relatively fine, because the vaccines make the effects much milder):
If you are not currently in the habit of doing aerobic exercise (e.g. running), I suspect that doing so in the coming months would be a good idea. Covid is known to affect the lungs, so your aerobic capacities will be negatively influenced by the virus, and doing aerobic exercise (both prior to and after infection) will ensure that this function (which affects both your mental stamina as well as general quality of life) will continue to be high-quality even after getting covid.
Given that my understanding is that most people, even those who are vaccinated, will at some point in the coming months be infected with Omicron (this is relatively fine, because the vaccines make the effects much milder):
If you are not currently in the habit of doing aerobic exercise (e.g. running), I suspect that doing so in the coming months would be a good idea. Covid is known to affect the lungs, so your aerobic capacities will be negatively influenced by the virus, and doing aerobic exercise (both prior to and after infection) will ensure that this function (which affects both your mental stamina as well as general quality of life) will continue to be high-quality even after getting covid.