Eight weeks of moderate-intensity exercise training increases heart rate variability in sedentary postmenopausal women

Jurča, Radim; Church, Timothy S.; Morss, Gina M.; Jordan, Alexander N.; Earnest, Conrad P.

doi:10.1016/j.ahj.2003.10.024

Cited by 133 publications

(128 citation statements)

References 42 publications

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“…However, at study completion, this change was in favour of the exercise group who then showed better heart rate variability. Our results are confirmed by that of Jurca et al in 2004 who, after 8 weeks of moderate exercise training in females, showed improved vagal modulation of heart rate on 10-min resting ECGs [36]. Many previous studies done on diseased populations to evaluate the effect of short-term exercise intervention on short-term HRV modification assessed only supine variables [37][38][39][40][41][42][43].…”

Section: Discussionsupporting

confidence: 90%

Effect of exercise on cardiac autonomic function in females with rheumatoid arthritis

et al. 2012

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The objective of this study is to evaluate the effect of exercise on cardiac autonomic function as measured by short-term heart rate variability (HRV) in females suffering from rheumatoid arthritis (RA). Females with confirmed RA were randomly assigned to an exercise group (RAE) and a sedentary group (RAC). RAE was required to train under supervision two to three times per week, for 3 months. Three techniques (time domain, frequency domain and Poincaré plot analyses) were used to measure HRV at baseline and study completion. At baseline, RAC (n018) had a significantly higher variability compared to RAE (n019) for most HRV indicators. At study completion, the variables showing significant changes (p00.01 to 0.05) favoured RAE in all instances. Wilcoxon signed rank tests were performed to assess changes within groups from start to end. RAE showed significant improvement for most of the standing variables, including measurements of combined autonomic influence, e.g. SDRR (p00.002) and variables indicating only vagal influence, e.g. pNN50 (p00.014). RAC mostly deteriorated with emphasis on variables measuring vagal influence (RMSSD, pNN50, SD1 and HF (ms 2 )). Study results indicated that 12 weeks of exercise intervention had a positive effect on cardiac autonomic function as measured by short-term HRV, in females with RA. Several of the standing variables indicated improved vagal influence on the heart rate. Exercise can thus potentially be used as an instrument to improve cardiac health in a patient group known for increased cardiac morbidity.

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Section: Discussionsupporting

confidence: 90%

Effect of exercise on cardiac autonomic function in females with rheumatoid arthritis

et al. 2012

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“…Although the Polar Fitness Test® protocol uses the fact established in the literature that the HRV is higher at rest in well-trained individuals when compared to sedentary ones 12,20 and therefore, there is correlation between higher O 2max values and HRV at rest, our results showed that such association is not highly accurate. Thus, in situations in which the absolute O 2max values need to be extremely exact, as in high performance athletes, the use of the Polar Fitness Test® seems inappropriate.…”

Section: Discussioncontrasting

confidence: 53%

“…Such estimation occurs due to the traditional physiological effect of the aerobic physical training, which is the highest stimulation of the parasympathetic nervous system at rest. Consequently, there is also increase of the autonomic modulation and of the HRV (12) . Thus, this protocol (Polar Fitness Test®) enables the application of the O 2max test in some situations in which there are not standardized instruments for this purpose and/or in individuals not apt to perform maximal or submaximal tests.…”

Section: Introductionmentioning

confidence: 99%

Análise da correlação entre o protocolo Polar Fitness Test® para predição de VO2máx e ergoespirometria

Marocolo

Neto

Vianna

et al. 2012

Rev Bras Med Esporte

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Introduction: The importance of maximal oxygen consumption ( O 2max ) measurement is justified by its international acceptance as the best physiological parameter to assess the functional capacity of the cardiorespiratory system in both athletes and non-athletes who physically train in order to achieve better health. Objective: To determine the agreement between the Polar Fitness Test® protocols to estimate of O 2max and the maximal exercise test with direct gas measurement. Methods: Seventeen active males (22.5 ± 2 years) participated in the study. At rest, the Polar Fitness Test® protocol by direct gas collection under maximum effort on treadmill and the Bruce protocol were applied. Results: Significant difference in the O 2max estimation was observed between methods. The Polar Fitness Test® protocol underestimated O 2max a mean of 15% (CI 95% : 24;-53%) when compared to the direct protocol. The values obtained by the Polar Fitness Test® did not correlate well with direct measurement in ergospirometer (r = 0.1). Conclusion: The Polar Fitness Test® protocol is not valid to estimate O 2max in physically active young men.

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“…11 Further, regular physical activity has been shown to lower resting HR; 12 to improve HR recovery after acute exercise 12,13 and to increase global HRV [14][15][16] in several studies, though not all. 15,[17][18][19] These equivocal results could be because of differences in training characteristics. That is, results from individual studies suggest that indexes of HRV may be more beneficially modulated when training is performed at higher intensities.…”

Section: Introductionmentioning

confidence: 99%

Effects of aerobic training intensity on resting, exercise and post-exercise blood pressure, heart rate and heart-rate variability

et al. 2009

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We aimed to investigate the effects of endurance training intensity (1) on systolic blood pressure (SBP) and heart rate (HR) at rest before exercise, and during and after a maximal exercise test; and (2) on measures of HR variability at rest before exercise and during recovery from the exercise test, in at least 55-year-old healthy sedentary men and women. A randomized crossover study comprising three 10-week periods was performed. In the first and third period, participants exercised at lower or higher intensity (33% or 66% of HR reserve) in random order, with a sedentary period in between. Training programmes were identical except for intensity, and were performed under supervision thrice for 1 h per week. The results show that in the three conditions, that is, at rest before exercise, during exercise and during recovery, we found endurance training at lower and higher intensity to reduce SBP significantly (Po0.05) and to a similar extent. Further, SBP during recovery was, on average, not lower than at rest before exercise, and chronic endurance training did not affect the response of SBP after an acute bout of exercise. The effect of training on HR at rest, during exercise and recovery was more pronounced (Po0.05) with higher intensity. Finally, endurance training had no significant effect on sympathovagal balance. In conclusion, in participants at higher age, both training programmes exert similar effects on SBP at rest, during exercise and during post-exercise recovery, whereas the effects on HR are more pronounced after higher intensity training.

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Eight weeks of moderate-intensity exercise training increases heart rate variability in sedentary postmenopausal women

Cited by 133 publications

References 42 publications

Effect of exercise on cardiac autonomic function in females with rheumatoid arthritis

Effect of exercise on cardiac autonomic function in females with rheumatoid arthritis

Análise da correlação entre o protocolo Polar Fitness Test® para predição de VO2máx e ergoespirometria

Effects of aerobic training intensity on resting, exercise and post-exercise blood pressure, heart rate and heart-rate variability

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