When you laugh, your body releases good hormones (endorphins), decreases stress hormones (cortisol), and increases blood circulations.
Thus, laughter lowers blood pressure. Try to laugh at least 20 minutes each day to lower your blood pressure. “Laughter is the best medicine” because it relaxes your mind and body. Sitcoms or movies that make you laugh would be ideal to help lower your blood pressure.
Also, see the following on YoUTUBE
Laughter is the Best Medicine | David Cruz | TEDxTemecula
Why we laugh | Sophie Scott
The Skill of Humor | Andrew Tarvin | TEDxTAMU