Here's How Poor Sleep May Hurt Your Heart

The study, conducted in mice, found that fragmented sleep alters the levels of a certain hormone, which in turn, increases production of inflammatory cells in the bone marrow. This inflammation plays a role in the development of atherosclerosis, or hardening of the arteries due to plaque buildup. The findings, published today (Feb. 13) in the journal Nature, suggest that proper sleep "protects against atherosclerosis" and, conversely, that disrupted sleep makes the condition worse, the res...

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