Laughter

Laughter helps open up the inner lining of blood vessels, called the endothelium, improving arterial blood flow. A well-functioning endothelium is your first defense against hardening of the arteries and cardiovascular disease.
According to researchers, a hearty laugh — the equivalent of watching a 15-minute comedy clip — can boost blood vessel function for an hour. Other research has found that these levels remain elevated up to 24 hours later.
Making time for laughter at least once a day may help keep your cardiovascular health in tip-top shape.