As the COVID vaccine becomes more widely available and more people are getting vaccinated (hooray!), some folks are experiencing mild side effects from the vaccine. The CDC notes that these side effects usually subside within a few days, but they can be annoying. One of the more common side effects is soreness in the shoulder of the arm that received the injection. The CDC recommends light exercise as a way to help reduce any pain and discomfort experienced after this vaccination. Here are a few gentle exercises that may help.