Poor sleep has been linked to all kinds of heart problems, including high blood pressure, atherosclerosis, heart attack, and stroke. Just a single bad night can cause a person with hypertension to have elevated blood pressure throughout the next day. Knutson says part of the problem seems to be that lack of sleep not only reduces activity of the parasympathetic nervous system but increases that of the sympathetic nervous system – the one we associate with fight or flight.
Credit: Lynn Koenig / Getty Images
Powered By ZergNet
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.
Gear of the Year
103 Must-Have Gadgets, Tools & Toys
Plus: The Plan to Save Africa's Rhinos
ON NEWSSTANDS NOW