Key result
Low-intensity resistance exercise with blood flow restriction lowers blood pressure ~14 mmHg and increases vagal modulation.
Why the study?
The acute effects of resistance exercise sessions with different partial blood flow restrictions on hemodynamic parameters and cardiac autonomic modulation in older women with metabolic syndrome were unknown.
Does low-intensity resistance exercise with partial blood flow restriction improve hemodynamic parameters and cardiac autonomic modulation in older women with metabolic syndrome?
RCT (n=39)
Does low-intensity resistance exercise with partial blood flow restriction improve hemodynamic parameters and cardiac autonomic modulation in older women with metabolic syndrome?
Low-intensity resistance exercise with 60% or 80% blood flow restriction acutely reduces blood pressure and improves heart rate variability in older women with metabolic syndrome.
Answers are grounded in this paper and cite their sources.
Hypothesis-generating for BFR-augmented exercise in metabolic syndrome; leaves open durability, safety, and outcomes in larger trials.
AIM: To compare the acute effects of two resistance exercise sessions with different partial blood flow restrictions (BFR) on hemodynamic parameters and cardiac autonomic modulation in older women with metabolic syndrome. METHODS: Thirty-nine older women (64.4 ± 4.5 years) were allocated into three groups: BFR0 = resistance exercise (20%, 1 maximum repetition [MR]) + 0% BFR; BFR60 = 20% 1 MR resistance exercise + 60% BFR; and BFR80 = 20% 1MR resistance exercise + 80% BFR. RESULTS: A reduction of 14 mmHg (BFR60 group) and 13 mmHg (BRF80 group) was observed 48 hr after the first exercise session, while vagal modulation was increased in the BRF60 group after 24 and 48 hr. CONCLUSION: A low-intensity resistance exercise session with 60% and 80% of BFR resulted in blood pressure (systolic, diastolic, and mean) reduction and positive changes on heart rate variability after 24 h of a RE session.
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Maciel et al. (2020) conducted an RCT in Metabolic syndrome (n=39). Resistance exercise with blood flow restriction vs. Resistance exercise with 0% blood flow restriction was evaluated on Hemodynamic parameters and cardiac autonomic modulation. Low-intensity resistance exercise with 60% and 80% blood flow restriction reduced blood pressure by 14 mmHg and 13 mmHg, respectively, and increased vagal modulation at 48 hours.
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