Key result
A single session of high-intensity interval training increased diastolic and mean blood pressure (p < 0.01) and impaired heart rate variability in untrained postmenopausal women.
Why the study?
The study aimed to analyze the blood pressure and heart rate variability responses to acute single sessions of high-intensity interval training in untrained postmenopausal women.
Does an acute single session of high-intensity interval training affect blood pressure and heart rate variability in untrained postmenopausal women?
RCT (n=16)
random order crossover
Does an acute single session of high-intensity interval training affect blood pressure and heart rate variability in untrained postmenopausal women?
p-value: p=< .01
A single session of high-intensity interval training acutely increases blood pressure and impairs heart rate variability in untrained postmenopausal women, indicating increased cardiac stress.
Acute HIT may alter BP and HRV in postmenopausal women; leaves open whether repeated sessions improve outcomes.
Purpose: The aim of this study was to analyze the blood pressure (BP) and heart rate variability (HRV) responses in untrained postmenopausal women submitted to acute single sessions of high-intensity interval training (HIT). Method: Sixteen postmenopausal women (59.9 ± 5.6 years, 26.7 ± 3.0 kg/m2) participated in a random order of two acute sessions in a balanced crossover format: control without exercise in sitting position or HIT session. BP and heart rate (HR) were recorded before and during 60 min following the sessions. Results: Diastolic (DBP), mean BP (MBP), and double product (DPO) showed interaction (p < .01). DBP, MBP, and DPO increased (p < .01) after HIT but not after the control session. The area under the curve (AUC) of DBP (p = .02) and DPO (p < .01) were different between conditions. Time and frequency indices of HRV presented interaction (p < .05) which impaired these indices post-HIT, but not post-control. The AUC of time and frequency HRV indices were different between conditions. Conclusions: A single session of HIT may increase BP and cardiac stress and cause perturbation of the autonomic function in untrained postmenopausal women.
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Freitas et al. (2021) conducted an RCT in Untrained postmenopausal women (n=16). High-intensity interval training (HIT) vs. control without exercise in sitting position was evaluated on Diastolic blood pressure (DBP), mean blood pressure (MBP), and double product (DPO) (p=< .01). A single session of high-intensity interval training increased diastolic and mean blood pressure (p < 0.01) and impaired heart rate variability in untrained postmenopausal women.
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