After rehearsals, some of the singers provided a saliva sample to researchers examining whether singing affected their health and mood — and it did, positively. The “Sing With Us” study, which enrolled Hardy and 192 others, is part of a growing body of research that points to the physical and mental health benefits of singing with others. Sing With Us linked singing in the choir to reduced stress hormones and increased cytokines, proteins that can boost the body’s ability to fight serious illness. (View Highlight)