Postexercise hypotension in central aortic pressures following walking and its relation to cardiorespiratory fitness

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Abstract

BACKGROUND: Central aortic blood pressure (BP) is reduced after exercise. The aim of this study was to determine whether cardiorespiratory fitness relates to postexercise reductions in aortic BP. METHODS: Sixteen young adults completed maximal exercise testing for peak oxygen uptake (VO 2 ). Participants walked at a slow (80 steps/ min, ~47% maxHR) and fast (125 steps/min, ~65% maxHR) stepping cadence for 3000 steps on two nonconsecutive days. Before and after each walking condition, radial tonometry was used to derive aortic pressures. Measurements after walking were taken after 30 and 60 min of supine recovery. RESULTS: The change in aortic BP was similar between walking cadences. Aortic systolic BP (-2.3 mmHg, P=0.03) and pulse pressure (-3.2 mmHg, P<0.001) were significantly reduced after 60 min of recovery as compared to baseline. The reduction in aortic pulse pressure was associated with decreased forward (r=0.69, P<0.001) and backward wave pressure (r=0.70, P<0.001). Peak VO 2 was not associated (P>0.05) with these changes, but was strongly associated with non-significant changes in aortic systolic BP (30min: r=-0.54, P=0.03) and diastolic BP (30 min: r=-0.64, 60 min: r=-0.77; both P<0.01) after slow walking only. CONCLUSIONS: These results indicate that cardiorespiratory fitness associates with aortic pressure reductions after walking dependent on exercise intensity.

Original languageEnglish
Pages (from-to)717-722
Number of pages6
JournalJournal of Sports Medicine and Physical Fitness
Volume59
Issue number4
DOIs
StatePublished - Apr 2019

Keywords

  • Blood pressure
  • Post-exercise hypotension
  • Pulse wave analysis
  • Walking

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