Why Do I Black out When I Stretch?

Coughing, urinating, and stretching can also get in the way of the flow of oxygen to the brain and may cause you to faint. If you faint once during one of these activities, it's probably not something to worry about.

Why do I get really dizzy when I stretch?

Simply standing from a lying or seated position (more often during exercise) makes blood rush and gather down in your legs and abdomen. This means less blood is circulating and getting back to your heart, causing the decrease in your blood pressure.

Why do I pass out when I stand up and stretch?

Some people have a problem with the way their body regulates their blood pressure, particularly when they move too quickly from a lying or sitting position to a standing position. This condition is called postural hypotension and may be severe enough to cause fainting.