There’s
an old Zen saying that has something very profound to say about stress and
meditation. It goes something like this. ‘You should sit in meditation for twenty
minutes a day, unless you’re too busy, in which case you should sit for an
hour.’ Well, new research shows that even short sessions of mindfulness
meditation are effective at reducing mental stress.
Researchers
at Carnegie Mellon University have found that engaging in mindfulness
meditation for twenty-five minutes for just three days can significantly lower
stress and boost the ability to endure stress.
‘More
and more people report using meditation practices for stress reduction, but we
know very little about how much you need to do for stress reduction and health
benefits,’ said lead author Dr J David Creswell (pictured left), associate professor of psychology in
the Dietrich College of Humanities and Social Sciences, in a press release.
We have known for many years
that the so-called ‘stress cascade’ is governed by the brain's hypothalamus,
which communicates with the pituitary and adrenal glands, which in turn secrete
stress hormones like cortisol. Too much cortisol in the bloodstream is
not a good thing at all. Finding effective ways of preventing or blocking the
body’s stress reaction from occurring is the name of the game.
The
Carnegie Mellon University study was conducted on 66 healthy participants aged
between 18 and 30. They were told to take part in a 3-day experiment where some
participants underwent mindfulness meditation training programs for 25 minutes
for three consecutive days. Others were told to learn breathing exercises that
could help monitor their breath and pay attention to their present moment
experiences. The researchers also included a matched control group where
participants were told to improve their problem-solving skills through poetry
analysis.
Following
their programs, participants were given tasks to complete stressful speech and
math in front of ‘stern’ researchers who recorded their stress levels by
measuring cortisol levels in saliva samples.
The
study findings showed that people in the mindfulness meditation group were less
stressed when performing speech and math tasks. However, these participants
also showed greater cortisol reactivity in saliva samples.
‘When
you initially learn mindfulness mediation practices, you have to cognitively
work at it -- especially during a stressful task,’ said Dr Creswell. ‘And, these
active cognitive efforts may result in the task feeling less stressful, but
they may also have physiological costs with higher cortisol production.’
The
findings have been published in the journal Psychoneuroendocrinology.
Journal article: Creswell
J D, Pacilio L E, Lindsay E K, and Brown K W, ‘Brief mindfulness meditation training alters psychological and neuroendocrine responses to social evaluative stress.’ Psychoneuroendocrinology. Vol 44, June
2014, 1-12.
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