Blood pressure and cardiac autonomic adaptations to isometric exercise training: A randomized sham-controlled study
Journal article
De Caux, A., Edwards, J., Swift, H., Hurst, P., Wiles, J. and O'Driscoll, J. 2022. Blood pressure and cardiac autonomic adaptations to isometric exercise training: A randomized sham-controlled study. Physiological Reports. 10 (2), p. e15112.
Authors | De Caux, A., Edwards, J., Swift, H., Hurst, P., Wiles, J. and O'Driscoll, J. |
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Abstract | Isometric exercise training (IET) is increasingly cited for its role in reducing resting blood pressure (BP). Despite this, few studies have investigated a potential sham effect attributing to the success of IET, thus dictating the aim of the present study. Thirty physically inactive males (n=15) and females (n=15) were randomly assigned into 3 groups. The IET group completed a wall-squat intervention at 95% peak heart rate (HR) using a prescribed knee joint angle. The sham group performed a parallel intervention, but at an intensity (<75% peak HR) previously identified to be inefficacious over a 4-week training period. No-intervention controls maintained their normal daily activities. Pre- and post-measures were taken for resting and continuous blood pressure and cardiac autonomic modulation. Resting clinic and continuous beat to beat systolic (-15.2±9.2 and -7.3±5.6 mmHg), diastolic (-4.6±5 and -4.5±5.1) and mean (-7±4.2 and -7.5±5.3) BP, respectively, all significantly decreased in the IET group compared to sham and no-intervention control. The IET group observed a significant decrease in low frequency normalised units of heart rate variability concurrent with a significant increase in high frequency normalised units of heart rate variability compared to both the sham and no-intervention control groups. The findings of the present study reject a non-specific effect and further support the role of IET as an effective anti-hypertensive intervention. |
Keywords | Isometric exercise training (IET); Hypertension; Blood pressure |
Year | 2022 |
Journal | Physiological Reports |
Journal citation | 10 (2), p. e15112 |
Publisher | Wiley |
ISSN | 2051-817X |
Official URL | https://physoc.onlinelibrary.wiley.com/doi/full/10.14814/phy2.15112 |
Publication dates | |
Online | 27 Jan 2022 |
Publication process dates | |
Accepted | 27 Oct 2021 |
Deposited | 11 Nov 2021 |
Publisher's version | License |
Output status | Published |
https://repository.canterbury.ac.uk/item/8z841/blood-pressure-and-cardiac-autonomic-adaptations-to-isometric-exercise-training-a-randomized-sham-controlled-study
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