Key result
Dynamic resistance training abolishes systolic post-exercise hypotension and increases sympathovagal balance in medicated hypertensive men.
Why the study?
Data were limited regarding the attenuation of postexercise hypotension with exercise training and the mechanisms involved in this blunted response had not been studied.
Does 10 weeks of dynamic resistance training alter post-exercise hypotension and its mechanisms in treated hypertensive men?
RCT (n=16)
Randomly assigned to dynamic resistance training in the parent trial
No
Does 10 weeks of dynamic resistance training alter post-exercise hypotension and its mechanisms in treated hypertensive men?
In medicated hypertensive men, 10 weeks of dynamic resistance training lowers resting systolic blood pressure but abolishes the acute post-exercise hypotensive response, likely due to enhanced post-exercise sympathovagal balance.
May blunt post-exercise hypotension in treated hypertensive men; hypothesis-generating for mechanisms, should not yet change practice.
BACKGROUND: A possible chronic effect of exercise training is the attenuation of the acute decrease in blood pressure (BP) observed after the execution of a session of exercise [i.e. called postexercise hypotension (PEH)]. However, there are few empirical data regarding this issue, and the possible mechanisms involved in this blunted response have not been studied. AIM: The study aimed to evaluate the effects of dynamic resistance training (DRT) on PEH and its systemic, vascular, and autonomic mechanisms. METHODS: Data from 16 middle-aged treated hypertensive men who underwent DRT (eight exercises, 50% of 1RM, three sets until moderate fatigue) three times/week for 10 weeks were analyzed. Before and after the training period, the participants underwent an experimental session in which BP (auscultation), systemic hemodynamics (CO 2 rebreathing), vascular function (duplex ultrasound), and cardiovascular autonomic modulation (spectral analysis of heart rate and BP variabilities) were assessed before and after a session of DRT. RESULTS: DRT reduced preexercise systolic BP and mitigated the systolic PEH that occurred before but not after the training period ( P = 0.017). DRT did not change the diastolic PEH that occurred with similar magnitude before and after the training period ( P = 0.024). DRT did not change the PEH mechanisms, except for cardiac sympathovagal balance that increased significantly more after the session of DRT conducted in the posttraining evaluation ( P = 0.017). CONCLUSION: In medicated hypertensive men, 10 weeks of DRT decreased preexercise systolic BP, abolished systolic PEH, and induced a greater increase in postdynamic resistance exercise sympathovagal balance.
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Fecchio et al. (2024) conducted an RCT in Hypertension (n=16). Dynamic resistance training vs. Pre-training baseline was evaluated on Systolic post-exercise hypotension (change in systolic blood pressure from pre- to post-exercise) (p=0.017). Ten weeks of dynamic resistance training abolished systolic post-exercise hypotension (-6±5 vs. -2±3 mmHg) and induced a greater increase in post-exercise sympathovagal balance in medicated hypertensive men.
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