Acute effects of breaking up sitting time with isometric wall squat exercise on vascular function and blood pressure in sedentary adults: Randomized crossover trial
Journal article
Silva, J, K.,T,F., Meneses, A.L., Silva, G.O., O'Driscoll, J., Ritti-Dias, R.M., Correia, M.A. and Farah, B.Q 2023. Acute effects of breaking up sitting time with isometric wall squat exercise on vascular function and blood pressure in sedentary adults: Randomized crossover trial. Journal of Cardiopulmonary Rehabilitation and Prevention.
Authors | Silva, J, K.,T,F., Meneses, A.L., Silva, G.O., O'Driscoll, J., Ritti-Dias, R.M., Correia, M.A. and Farah, B.Q |
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Abstract | Purpose: The World Health Organization has recommended breaking up sitting time to improve cardiovascular health. However, whether isometric exercise can be effectively used as a strategy to break up sitting time remains unclear. Thus, the aim of this study was to analyze the acute effects of breaking up prolonged sitting with isometric wall squat exercise on vascular function and blood pressure in sedentary adults. Methods: This randomized crossover trial included 17 adults (52.9% men, 26±6 yrs, 22.4±3.6 kg/m2) with high sedentary behavior (≥ 6h per day). The participants completed two experimental sessions in a randomized order, both sharing a common sitting period of 180 minutes: Breaks (two-minute breaks were incorporated into the isometric wall squat exercise, with participants maintaining their knees at the angle determined by the incremental test, which occurred every 30 minutes) and Control (sitting for 180 minutes continuously). Popliteal artery flow-mediated dilation (FMD) and brachial blood pressure were measured before, at 10 and 30 minutes after the experimental sessions. Results: The results did not indicate significant session vs. time interaction effects on popliteal FMD and brachial blood pressure (p>0.05). A sub-analysis including only participants with popliteal FMD reduction after the Control session (n=11), revealed that Breaks enhanced popliteal FMD after 10 minutes (1.38±6.45 % vs. -4.87±2.95 %, p=.002) and 30 minutes (-0.43±2.48 % vs. -2.11±5.22 %, p=.047). Conclusion: breaking up prolonged sitting with isometric wall squat exercise mitigates impaired vascular function resulting from prolonged sitting but has no effect on blood pressure in sedentary adults. |
Keywords | Cardiovascular system; Exercise; Isometry; Sitting time; Vascular function |
Year | 2023 |
Journal | Journal of Cardiopulmonary Rehabilitation and Prevention |
Publisher | Lippincott, Williams and Wilkins |
ISSN | 1932-7501 |
1932-751X | |
Publication process dates | |
Accepted | 12 Mar 2024 |
Deposited | 14 Mar 2024 |
Accepted author manuscript | File Access Level Restricted |
Output status | In press |
https://repository.canterbury.ac.uk/item/975w1/acute-effects-of-breaking-up-sitting-time-with-isometric-wall-squat-exercise-on-vascular-function-and-blood-pressure-in-sedentary-adults-randomized-crossover-trial
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