How do we perform regression testing in manual testing?

Regression testing is nothing but testing the application for an existing functionality. When ever a release for a software is made, some new functioanlity is introduced. In our normal test cycle we would test the application against the new functionality. But there should be some testing done to ensure that because of these new functionalities, our old functionalities are not affected. This testing is known as Regression Testing

While performing regression testing we do not need careate new Test case and all.