Key result
Isometric resistance training significantly reduced 24-h ambulatory systolic blood pressure by 6 mmHg, an effect that was maintained after an 8-week detraining period in young normotensives.
Why the study?
Data were lacking regarding how long the blood pressure-lowering effects of isometric resistance training are maintained after cessation of training.
Does 8 weeks of isometric resistance training followed by 8 weeks of detraining improve ambulatory blood pressure and morning blood pressure surge in young normotensive individuals?
RCT (n=25)
Online random numbers generator
No
Does 8 weeks of isometric resistance training followed by 8 weeks of detraining improve ambulatory blood pressure and morning blood pressure surge in young normotensive individuals?
Isometric resistance training induces significant reductions in ambulatory blood pressure and morning blood pressure surge that are sustained for at least 8 weeks after training cessation in young normotensives.
Answers are grounded in this paper and cite their sources.
May support isometric training for BP management in young adults; extends evidence on post-detraining durability of ambulatory reductions.
Isometric resistance training (IRT) has been shown to reduce resting and ambulatory blood pressure (BP), as well as BP variability and morning BP surge (MBPS). However, there are no data available regarding how long after cessation of IRT these effects are maintained. Therefore, the purpose of this study was to determine the effects of 8 weeks of detraining on resting BP, ambulatory BP and MBPS following 8 weeks of IRT in a population of young normotensive individuals and to further substantiate previously reported reductions in MBPS following IRT. Twenty-five apparently healthy participants with resting BP within the normal range (16 men, age = 23 ± 6 years; 9 women, age = 22 ± 4 years, resting BP: 123 ± 5/69 ± 7 mmHg) were randomly assigned to a training-detraining (TRA-DT, n = 13) or control (CON, n = 12) group. Resting BP, ambulatory BP and MBPS were measured prior to, after 8 weeks of bilateral leg IRT using an isokinetic dynamometer (4 × 2-min contractions at 20% MVC with 2-min rest periods, 3 days/week) and following an 8-week detraining period. There were significant reductions in 24-h ambulatory systolic BP (SBP) and calculated SBP average real variability (ARV) following IRT that were maintained after detraining (pre-to-post detraining, −6 ± 4 mmHg, p = 0.008, −2 ± 1.5 mmHg, p = 0.001). Similarly, the training-induced decreases in daytime SBP and daytime SBP ARV (pre-to-post detraining, −5 ± 6 mmHg, p = 0.001; −2 ± 1.2 mmHg, p = 0.001, respectively), MBPS (pre-to-post detraining, −6 ± 9 mmHg, p = 0.046) and resting SBP (pre-to-post detraining, −4 ± 6 mmHg, p = 0.044) were preserved. There were no changes in night-time or night-time SBP ARV across all time points (pre-to-post detraining, −1 ± 8 mmHg, p = 1.00, −0.7 ± 2.9 mmHg, p = 1.00). These results confirm that IRT causes significant reductions in resting BP, ambulatory BP, ambulatory ARV and MBPS. Importantly, the changes remained significantly lower than baseline for 8 weeks after cessation of training, suggesting a sustained effect of IRT.
No takes yet. Share an insight, caveat, or question.
Baross et al. (2022) conducted an RCT in Normotension (n=25). Isometric resistance training (IRT) vs. Control (maintained normal physical activity) was evaluated on Change in 24-h ambulatory systolic blood pressure from baseline to post-detraining (p=0.008). Isometric resistance training significantly reduced 24-h ambulatory systolic blood pressure by 6 mmHg, an effect that was maintained after an 8-week detraining period in young normotensives.
Synapse has enriched 10 related papers. Consider them for comparative context: