The effects of isometric exercise training on resting blood pressure with specific reference to selected cardiovascular, neuromuscular, and metabolic variables

Devereux, G. (2010) The effects of isometric exercise training on resting blood pressure with specific reference to selected cardiovascular, neuromuscular, and metabolic variables. Ph.D. thesis, Canterbury Christ Church University.

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Abstract

There were two purposes to the work of this thesis (a) to identify the role of isometric
training intensity in the training-induced reductions in resting blood pressure, and (b) to
identify whether the mechanism for the reduced resting blood pressure is best reflected
in what can be broadly termed cardiovascular, neuromuscular or metabolic markers of
that training. Firstly, in a cross-sectional study, the only strong correlation was found
between heart rate variability (a cardiovascular marker) and resting blood pressure.
Secondly, this cardiovascular marker was also significantly affected by a single session
of isometric exercise, an effect that persisted for at least 4 hours after exercise. However,
thirdly, this marker and other cardiovascular markers (such as cardiac output and stroke
volume) did not correlate with reductions in blood pressure seen after 4 weeks of
isometric training. Instead, the training-induced reductions in blood pressure correlated
strongly with neuromuscular and metabolic markers of isometric training. The extent to
which local muscle fatigue was induced during isometric training correlated with the
reductions in resting blood pressure. Therefore (a) isometric training intensity appears to
be of utmost importance in the reductions in resting blood pressure (when bilateral-leg
exercise is performed in 2 minute bouts), and (b) the mechanism whereby the
adaptations in resting blood pressure occur is best reflected in neuromuscular and
metabolic markers of local muscle fatigue during that training. These findings are
discussed with a particular focus on the possible role of muscle metaboreceptor
stimulation, during isometric training in the mechanism of training-induced reduction in
resting blood pressure.

Item Type: Thesis (Doctoral)
Uncontrolled Keywords: Electromyography; heart rate; leg extension
Subjects: Q Science > QP Physiology
Divisions: pre Nov-2014 > Faculty of Social and Applied Sciences > Sport Science, Tourism and Leisure
Depositing User: Users 2 not found.
Date Deposited: 09 May 2011 10:47
Last Modified: 21 Sep 2016 10:31
URI: https://create.canterbury.ac.uk/id/eprint/6974

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Last edited: 29/06/2016 12:23:00