When I read the recent articles on short sleepers, who appear to also have higher metabolisms, I noticed that none of the articles considered that there might be negative effects. Since such a small percentage of people are short sleepers, it seems likely that there are negative aspect.
http://www.sciencedaily.com/releases/2011/04/110427091949.htm
ScienceDaily (Apr. 27, 2011) — A recent study accepted for publication in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism (JCEM) found that higher metabolic rates predict early natural mortality, indicating that higher energy turnover may accelerate aging in humans.
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"We found that higher endogenous metabolic rate, that is how much energy the body uses for normal body functions, is a risk factor for earlier mortality," said Reiner Jumpertz, MD, of the National Institute of Diabetes and Digestive and Kidney Diseases in Phoenix, Ariz., and lead author of the study. "This increased metabolic rate may lead to earlier organ damage (in effect accelerated aging) possibly by accumulation of toxic substances produced with the increase in energy turnover."
"It is important to note that these data do not apply to exercise-related energy expenditure," added Jumpertz. "This activity clearly has beneficial effects on human health."
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