Post by Laoupdate on Jan 31, 2005 2:01:50 GMT -5
Morning Coffee Can Stress You All Day
ສຳລັບທ່ານທີ່ມັກດຶ່ມກາເຟ ເປັນຊີວິດຈິດໃຈ ເມື່ອທ່ານອ່ານຂ່າວນີ້ແລ້ວ ທ່ານອາດ
ດື່ມກາເຟຫນ້ອຍລົງ ດັງບົດລາຍງານຂອງບັນດາທ່ານໝໍ ດັ່ງຕໍ່ໄປນີ້
Its effects can last until bedtime.
Morning caffeine consumption can lead to increases in blood pressure, feelings of stress, and elevated stress hormone levels throughout the day and into the evening hours, according to researchers at Duke University.
The doctors studied 47 healthy, nonsmoking persons who were habitual coffee drinkers. For the study, participants were given a pill containing 500 mg of caffeine (equivalent to approximately four cups of coffee) or a placebo tablet at the beginning of a work day. On a separate workday, those who initially received the caffeine were given placebo, and vice versa. The subjects never knew whether they had received caffeine or placebo on a given day.
Researchers measured blood pressure and heart rate throughout the work day. In the evening, urinary levels of stress-related hormones such as cortisol and epinephrine were measured.
The study results, published in the July/August 2002 issue of Psychosomatic Medicine, revealed that those persons who consumed caffeine had a slight but significant increase in their blood pressure throughout the work day and a 32% increase in the level of excreted free epinephrine during the day and evening. Caffeine also potentiated the increases in blood pressure and heart rate that were associated with high levels of self-reported stress during the workday. The effects of caffeine persisted into the evening hours until bedtime.
These findings indicate that the effects of morning coffee consumption can exaggerate the body's stress responses and increase stress hormone levels all day long and into the evening, even when no further caffeine is consumed in the afternoon. Persons who suffer from stress-related diseases or conditions worsened by stress, such as cardiovascular disease and psychological conditions such as anxiety disorders, could be adversely affected by caffeine intake.
What can you do if you consume too much caffeine?
If you think caffeine consumption may be causing stress or aggravating your medical condition, remember that experts advise against sudden discontinuation of caffeine intake. Rather, you should decrease the amount of caffeine each day over a period of days and determine if your symptoms and mood improve.
ແລ້ວທ່ານເດ ມື້ຫນຶ່ງໆ ດື່ມກາເຟຈັກຈອກ ?
Photo: simongurney.co.uk/asia/laos/laos.htm
laoupdate.com ;D