Effect of exercise training on heart rate variability in healthy older adults☆,☆☆,★,★★
Section snippets
Experimental patients
Sixteen adults (7 men and 9 women) aged 66.2 ± 4.2 years completed the exercise part of this study. All patients were participating in a larger project evaluating the cardiovascular effects of exercise in older adults. Subjects were nonsmokers, without evidence of cardiovascular disease by history, cardiac examination, 12-lead electrocardiogram, and treadmill exercise testing. None were taking cardioactive medications and none had engaged in regular exercise for at least 2 years before
Baseline measurement
Initial indexes of heart rate and heart rate variability were compared between the training and comparison groups (no change in activity pattern). No statistically significant differences were observed.
Effect of exercise training on maximum oxygen consumption, maximum heart rate, and ectopy
Exercise training resulted in a marked increase in maximal oxygen consumption, expressed in either liters per minute (22.2%) or mL/kg/min (30.5%) (P < .001). This increase occurred in all patients. Maximal heart rate was not altered (Table I). A trend to a lower supine resting heart rate as
Discussion
The results of this study suggest that in healthy older adults the expected adaptive increase in maximal oxygen consumption in response to exercise training is associated with an increase in longer term indexes of heart rate variability. The clearest change is a decrease in nocturnal mean heart rate. Mean SDNN and SDANN, which reflect the longest term heart rate variability trends, are consequently increased. Low values for SDNN and SDANN have been associated with an increased risk for death
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2018, Psychiatry ResearchCitation Excerpt :It may be that such lifestyle and biological risk factors mediate the relationship between reduced HRV and cardiovascular related morbidity and mortality (Kemp and Quintana, 2013). Indeed, there is some evidence that reduced HRV is amenable to behavioural intervention that may improve future health outcomes (Rennie et al., 2003; Stein et al., 1999). In sum, mechanistic studies coupled with novel biomarkers across diagnostic categories and phases of illness are required to more accurately describe the role of HRV in psychiatric illness.
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2017, Science and SportsCitation Excerpt :The previous research states that the increase in vagal activity is directly related to the training volume [24,25,32], which is also consistent with the current study results. Although a relationship between HRV and endurance trainings has not been found in some research, a majority of studies suggest that vagal activity might improve as a result of a chronic effect of aerobic training [23,28,35,36]. The enhanced cardiovagal baroreflex and central regulation via cardiac output based on aerobic training [37] may also be the reasons of the improved vagal activity of the participants in the present study.
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From the aDivision of Cardiology, Washington University School of Medicine, bBarnes-Jewish Hospital, and the cDivision of Cardiology and Division of Geriatrics and Gerontology, Washington University School of Medicine, St. Louis; and the dDepartments of Medicine (Cardiology) and Pharmacology, Vanderbilt University School of Medicine, Nashville.
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Supported in part by the Claude D. Pepper Older American Independence Center NIH Grant AG 13629 and NIH Individual National Research Service Award F32 HL-08538.
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Reprint requests: Phyllis K. Stein, PhD, Division of Cardiology, Barnes-Jewish Hospital, 216 S Kingshighway Blvd, St. Louis, MO 63110. E-mail: [email protected]
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