title: Are cardiorespiratory fitness and walking performance associated with self-reported quality of life and work ability?
abstract: OBJECTIVE
  In Finland, testing cardiorespiratory fitness (VO2max) is popular in health promotion programs and work ability evaluations. The most common instruments used for this purpose are the submaximal cycle ergometer test, and the 2-km walking test. However, limited data exist on the associations between VO2max and wellbeing in working age adults. The aim of the study was to evaluate how the measured (cycle ergometer) and the estimated (walking test) VO2max and walking performance are associated with health-related quality of life and work ability.
  
  
  METHODS
  The subjects were 104 middle-aged men workers (45-55 years old), mostly from the construction and manufacturing industries. VO2max was directly measured by a maximal exercise test on a cycle ergometer. The 2-km walking test parameters were the walking time, predicted VO2max, and fitness index. Health-related quality of life was assessed with the RAND-36 questionnaire which was further divided into physical dimensions (P-RAND-36) and mental dimensions (M-RAND-36). Perceived work ability was assessed with the work ability index (WAI) in a subgroup of 51 subjects.
  
  
  RESULTS
  The 2-km walking test parameters significantly predicted the score on P-RAND-36 (r2=0.18, p=0.001), and correlated significantly with WAI. The directly measured VO2max was not associated with P-RAND-36, M-RAND-36 or WAI.
  
  
  CONCLUSIONS
  The inexpensive 2-km walking test may be more useful when evaluating the quality of life and work ability, compared to the more expensive direct measurement of one's cardiorespiratory fitness in a laboratory.
authors.affiliation: Suomen Terveystalo Oy, Vaajakoskentie 125, FIN-40800 Vaajakoski, Finland. lars.sorensen@fimnet.fi
authors.forename: Lars
authors.initials: L
authors.lastname: Sörensen
authors.forename: Sari
authors.initials: S
authors.lastname: Honkalehto
authors.forename: Mauri
authors.initials: M
authors.lastname: Kallinen
authors.forename: Mika
authors.initials: M
authors.lastname: Pekkonen
authors.forename: Veikko
authors.initials: V
authors.lastname: Louhevaara
authors.forename: Juhani
authors.initials: J
authors.lastname: Smolander
authors.forename: Markku
authors.initials: M
authors.lastname: Alén
mesh_terms: D005387:Finland; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption / Q000502:physiology; D010809:Physical Fitness / Q000502:physiology*; D011788:Quality of Life; D011795:Surveys and Questionnaires; D013647:Task Performance and Analysis; D016138:Walking