title: Speed and exercise intensity of recreational walkers.
abstract: BACKGROUND
  Brisk walking has been identified as an activity suited to meet American College of Sport Medicine/Centers for Disease Control and Prevention recommendations for moderate intensity exercise (55-69% HR(max), 40-59% VO(2)R). However, little is known about whether recreational walkers self-select a pace which elicits this intensity and how they interpret the term "brisk walking."
  
  
  METHODS
  The walking speed of 82 adults was covertly observed in a public park. Fifty-nine of these participants demonstrated their interpretation of "brisk walking" and the speed was noted. Eleven of these subjects subsequently walked on a treadmill at their observed and "brisk walk" speeds. Heart rate (HR), respiratory gases, and ratings of perceived exertion (RPE) were measured.
  
  
  RESULTS
  Mean observed and "brisk" walking speeds were 1.56 +/- 0.17 m. s(-1) and 1.79 +/- 0.19 m x s(-1) respectively (P < or = 0.001). Mean exercise intensities during the treadmill test (n = 11) were 59.0 +/- 13.4% VO(2max) and 67.3 +/- 11.6% HR(max) for the observed speed (1.60 + 0.24 m x s(-1)). The brisk speed (1.86 +/- 0.12 m x s(-1)) equated to 68.6 +/- 14.9% VO(2max) and 78.5 +/- 15.5% HR(max).
  
  
  CONCLUSIONS
  The speed and intensity selected by this group of walkers meets current recommendations for moderate intensity exercise. Instructing individuals to "walk briskly" prompts more vigorous activity.
authors.affiliation: School of Applied Medical Sciences and Sports Studies, University of Ulster at Jordanstown, Newtownabbey, County Antrim, BT37 0QB, Northern Ireland.
authors.forename: Elaine M
authors.initials: EM
authors.lastname: Murtagh
authors.forename: Colin A G
authors.initials: CA
authors.lastname: Boreham
authors.forename: Marie H
authors.initials: MH
authors.lastname: Murphy
mesh_terms: D000328:Adult; D000368:Aged; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion / Q000502:physiology*; D010809:Physical Fitness; D020377:Self Efficacy; D016138:Walking / Q000502:physiology*