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There is growing evidence that regular
exercise boosts people's moods and may even fight
clinical depression.
The investigators found that a
bout of aerobic activity appears to elevate the body's levels
of phenylethylamine, a natural chemical linked
to energy, mood and attention. When they had 20 healthy young
men run on a treadmill for 30 minutes, the average concentration
of phenylethylamine in the participants' urine increased 77%.
Because the chemical is similar in some
ways to amphetamines, the researchers speculate that phenylethylamine
may play a role in the "runner's high."
In addition, the report indicates, research
in patients with depression and bipolar disorder has shown
they have lower-than-normal levels of the chemical in their
urine.
British
Journal of Sports Medicine 2001;35:342-343
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