A new study suggests that choir singers not only manage to synchronize their voice with others in the group but also synchronize their heartbeats.

The researchers found that the heartbeats of the members increased and decreased at the same rate when they sang in a synchronized manner.
“When you are singing, the heartbeat for the whole group is going up and down simultaneously. It gives you pretty much the same effect as yoga breathing. It helps you relax, and there are indications that it does provide a heart benefit. We already know that choral singing synchronises the singers’ muscular movements and neural activities in large parts of the body. Now we also know that this applies to the heart, to a large extent”, lead researcher Dr Bjorn Vickhoff said.
Source-Medindia