Singing in a choir boosts the immune system of people affected by cancer, according to a new study.
The research carried out by the cancer charity Tenovus and the Royal College of Music found it can help reduce stress and improve your mood.
The charity says it opens up possibilities to help put people in the best position to receive treatment and support cancer patients.
Watch the report by Kathryn Tresilian:
The study tested 193 members of five different choirs with results showing that singing for an hour was associated with reductions in stress hormones.
And increases in the quantities of proteins of the immune system which can boost the body's ability to fight serious illness.
Choir members were tested by giving their samples of saliva before an hour of singing, and then again just after.
The samples were analysed to see what changes occurred in a number of hormones and immune proteins.
Tenovus Cancer Care is now launching a two year study looking in more depth at the long term effects of choir singing over several months.
It will look at mental health, wellbeing, social support and a persons ability to cope with cancer.