She d:ied in his sleep from doing this: I beg you, don't do it. It causes heart attacks and strokes

Nighttime is when the body shifts into maintenance mode. Heart rate slows, breathing changes, muscles relax and blood pressure drops. These natural changes are healthy, but they also mean that problems we ignore during the day can quietly become more serious at night.

Take circulation, for example. Many people, especially as they get older, experience poor blood flow to their feet and legs. Letting your feet hang out of the covers isn’t dangerous by itself, but constantly cold feet can be a sign that circulation isn’t ideal. When blood vessels narrow in the cold, tissues receive less oxygen. Over time, if circulation problems go unnoticed, they can be linked to heart and vascular disease.

Sleep posture matters too. An awkward position that slightly restricts breathing or strains the neck might only feel mildly uncomfortable when you first lie down. But over several hours, that same position can worsen snoring, trigger sleep apnea, or reduce oxygen levels. Many people who suffer serious nighttime cardiac or breathing events never felt “sick” before bed; their bodies simply struggled once fully at rest.

There’s also the issue of sensation. Some people,,,,,