Key result
Acute resistance exercise using weight machines elicited similar responses in young men and women, significantly increasing the augmentation index normalized at 75bpm from 7.7% to 15.5%.
Why the study?
Although acute resistance exercise alters measures of wave reflection and aortic arterial stiffness in young, healthy individuals, limited research has evaluated sex differences.
Does an acute bout of weight machine resistance exercise alter measures of aortic wave reflection and aortic arterial stiffness differently between sexes in young, healthy individuals?
RCT (n=21)
Randomized within-subjects cross-over
No
Does an acute bout of weight machine resistance exercise alter measures of aortic wave reflection and aortic arterial stiffness differently between sexes in young, healthy individuals?
Acute resistance exercise using weight machines transiently increases measures of aortic wave reflection and reduces myocardial perfusion similarly in both young men and women, without altering aortic arterial stiffness.
Answers are grounded in this paper and cite their sources.
Acute resistance exercise transiently raises wave reflection similarly in young adults; extends evidence on sex-independent acute vascular responses.
While it has been demonstrated that acute resistance exercise (RE) alters measures of wave reflection and aortic arterial stiffness in young, healthy individuals, limited research has evaluated sex differences. Accordingly, we recruited moderately active, resistance-trained men (Age: 22 ± 3yrs, n=12) and women (23 ± 3yrs, n=10) to perform two randomized conditions consisting of an acute bout of weight machine RE or a quiet control (CON). Measures of aortic wave reflection and aortic stiffness were taken at baseline and 15 minutes following the RE (Recovery). At baseline, women had significantly higher heart rate (p = 0.05) and lower brachial systolic blood pressure (p = 0.009) compared to men. There were no significant three-way interactions for any variable. Significant condition by time interactions were noted for heart rate (Baseline: 65 ± 10bpm, Recovery: 87 ± 13bpm, p = 0.001), brachial systolic blood pressure (Baseline: 116 ± 9mmHg, Recovery: 123 ± 10mmHg, p = 0.014), and the augmentation index (AIx) normalized at 75bpm (Baseline: 7.7 ± 12.8%, Recovery: 15.5 ± 9.5%, p = 0.002) such that Recovery was augmented compared to Baseline following RE but not CON. There was also a significant main effect of time for augmentation pressure (Baseline: 4.1 ± 4.0mmHg, Recovery: 4.0 ± 3.6mmHg, p = 0.04) such that it decreased from Baseline to Recovery following RE but not the CON. There were no significant effects of sex, condition, or time on aortic arterial stiffness. Men and women have similar responses in measures of aortic wave reflection and aortic arterial stiffness following acute RE using weight machines.
No takes yet. Share an insight, caveat, or question.
Erb et al. (2022) conducted an RCT in Healthy, moderately active, resistance-trained individuals (n=21). Acute weight machine resistance exercise vs. Supine, time-matched quiet control was evaluated on Augmentation index normalized at 75bpm (AIx@75) (p=0.002). Acute resistance exercise using weight machines elicited similar responses in young men and women, significantly increasing the augmentation index normalized at 75bpm from 7.7% to 15.5%.
Synapse has enriched 10 related papers. Consider them for comparative context: