The first challenge was to step
down from a 19 cm (7.5 inch) platform and maintain a single-leg
stance for 10 seconds. After that challenge was evaluated, the
participants were asked to perform the same step while responding to
a cognitive challenge called an auditory Stroop test. They were
required to respond to the tone of voice regardless of the actual
words. The primary outcome measure was postural stability, with other
outcomes also measured.
There was a significant difference
in the measures between the two groups. The authors said, "…
the auditory Stroop test showed that Tai Chi practitioners achieved
not only significantly less error rate in single-task, but also
significantly faster reaction time in dual-task, when compared with
healthy controls similar in age and other relevant demographics.
Similarly, the stepping-down task showed that Tai Chi practitioners
not only displayed significantly less COP sway area in single-task,
but also significantly less COP sway path than healthy controls in
dual-task. These results showed that Tai Chi practitioners achieved
better postural stability after stepping down as well as better
performance in auditory response task than healthy controls. The
improved performance that was magnified by dual motor-cognitive task
performance may point to the benefits of Tai Chi being a
mind-and-body exercise."
The study was published in: Eur J
Appl Physiol. 2013 Mar 14. By Lu X, Siu KC, Fu SN, et al. from Dept
of Rehabilitation Sciences, The Hong Kong Polytechnic University,
Hong Kong, China.
© 2014 by Eric Borreson
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