Key result
Combined aerobic and resistance training for 4 weeks significantly increased high frequency normalized units (81.4 vs 57.1, p<0.001) compared to control in sedentary hypertensive women.
Why the study?
Does combined aerobic and resistance training improve heart rate variability and blood pressure in sedentary hypertensive women?
RCT (n=28)
Single-blind
Block randomization
No
Does combined aerobic and resistance training improve heart rate variability and blood pressure in sedentary hypertensive women?
Combined aerobic and resistance training for 4 weeks significantly improves heart rate variability and reduces blood pressure in sedentary middle-aged women with hypertension.
Answers are grounded in this paper and cite their sources.
Supports combined training to improve autonomic function in hypertensive women; extends RCT evidence on HRV beyond aerobic exercise alone.
OBJECTIVE: To investigate the effect of combined aerobic and resistance training (CART) on heart rate variability in sedentary, hypertensive women. PARTICIPANTS: A total of twenty-eight hypertensive (Stage 1 and 2) sedentary women (Age 40.54 ± 4.2 yrs; Height 155.14 ± 5.4 cm; Weight 70.96 ± 10.2 kg; BMI 29.6 ± 4.4; Duration of HTN: 6.43 ± 2.5 yrs) were recruited for the study. METHODS: (maximum heart rate) and resistance exercises at 50-80% of 1 Repetition Maximum (RM)], 5 times/week for 4 weeks, or to the control group that followed conventional treatment without any supervised exercise intervention. MAIN OUTCOME MEASURES: Resting blood pressure was measured and standard heart rate variability (HRV) indices were calculated using time domain (SDNN, pNN50, RMSSD) and frequency domain (LFnu, HFnu, LF/HF and TP) analysis. RESULTS: CART group demonstrated an increase in HFnu, TP, SDNN, and RMSSD, (p < 0.05) along with a significant decrease in LFnu, LF/HF ratio, systolic blood pressure, and diastolic blood pressure (p < 0.05). CONCLUSION: CART showed significant improvement in HRV parameters indicating vagal dominance in middle-aged hypertensive women. Therefore, exercise training in combined form (aerobic and resistance) may be incorporated in the management programs of the patients suffering from hypertension in order to augment improvement in their cardiac autonomic control.
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Masroor et al. (2018) conducted an RCT in Hypertension (n=28). Combined aerobic and resistance training (CART) vs. Conventional treatment without supervised exercise was evaluated on High Frequency normalized units (HFnu) at 4 weeks (p=<0.001). Combined aerobic and resistance training for 4 weeks significantly increased high frequency normalized units (81.4 vs 57.1, p<0.001) compared to control in sedentary hypertensive women.
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