| Heart Rate Variability during 6-Min Walk Test in Adults Aged 40 Years and Older. | |
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MedLine Citation:
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PMID: 22972244 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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We evaluated age- and sex-dependent differences in heart rate variability (HRV) during the 6-min walk test (6MWT) in healthy adults. We also evaluated the intensity of the 6MWT based on HRV. 78 participants aged 40-49, 50-59, 60-69, and ≥70 years (42 females; 36 men) performed the 6MWT. Heart rate and HRV were monitored 1 min at rest and during the last 2-min of the test. The root mean square (RMSSD), instantaneous beat-to-beat variability (SD1), and long-term standard deviation (SD2) of RR intervals were calculated. The SD1 <3 ms at the end of the 6MWT was defined as high-intensity exercise. Despite the significantly higher peak values of heart rate observed for women, we did not find sex- and age-related differences in HRV during the 6MWT. The ROC curve identified percentage of maximum heart rate >67% as the best cut-point for prediction of high-intensity exercise with 94% of sensitivity and 65% of specificity (area under the curve=0.804). We may conclude that autonomic modulation of heart rate during exercise was not dependent of age and sex. The HRV assessment during walking enables a valid estimation of exercise intensity in adults. We may therefore suggest the use of 6MWT for assessing exercise capacity and for prescribing exercises in adults aged 40 yrs and older. |
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Authors:
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F R Corrêa; M A da Silva Alves; M S Bianchim; A Crispim de Aquino; R L F Guerra; V Z Dourado |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-9-12 |
Journal Detail:
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Title: International journal of sports medicine Volume: - ISSN: 1439-3964 ISO Abbreviation: Int J Sports Med Publication Date: 2012 Sep |
Date Detail:
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Created Date: 2012-9-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© Georg Thieme Verlag KG Stuttgart · New York. |
Affiliation:
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Department of Human Movement Sciences, Federal University of São Paulo, Santos, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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