title: The effect on cardiorespiratory fitness after an 8-week period of commuter cycling--a randomized controlled study in adults.
abstract: OBJECTIVE
  This study investigated the effect of commuter cycling on cardiorespiratory fitness in men and women. Secondary outcomes included body fat and blood pressure measurements.
  
  
  METHODS
  In February 2009, 48 volunteers from the Island of Funen, Denmark were randomly assigned to either "no change in lifestyle" or to "minimum 20 minutes of daily commuter cycling during 8 weeks". Maximal oxygen uptake was assessed directly during a progressive cycle-ergometer-test, sum of skinfolds was used as an estimate of body fat, and blood pressure was measured using a Dinamap monitor. Measurements were obtained at baseline and at the conclusion of the 8-week intervention program.
  
  
  RESULTS
  Six cyclists dropped out. After 8 weeks VO(2)max (mL O(2) min(-1)) and cardiorespiratory fitness (mL O(2) kg(-1) min(-1)) were significantly improved in the cycling group when compared to the control group. Delta change in VO(2)max between groups equaled 206 mL O(2) min(-1) (p=0.005) and delta change in cardiorespiratory fitness equaled 2.6 mL O(2) kg(-1) min(-1) (p=0.003). Body fatness changed more noticeable (p=0.026) in the cyclists (-12.3±7.3 mm) than in the controls (-0.2±7.1 mm).
  
  
  CONCLUSIONS
  VO(2)max and cardiorespiratory fitness were significantly improved and body fat reduced as a result of people engaging in 8 weeks of commuter cycling.
authors.affiliation: Centre for Research in Childhood Health, Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark. ncmoller@health.sdu.dk
authors.forename: Niels Christian
authors.initials: NC
authors.lastname: Møller
authors.forename: Lars
authors.initials: L
authors.lastname: Østergaard
authors.forename: Jens Raaberg
authors.initials: JR
authors.lastname: Gade
authors.forename: Jeppe Lund
authors.initials: JL
authors.lastname: Nielsen
authors.forename: Lars Bo
authors.initials: LB
authors.lastname: Andersen
mesh_terms: D000273:Adipose Tissue; D000328:Adult; D001642:Bicycling / Q000502:physiology*; D002319:Cardiovascular System; D003718:Denmark; D005080:Exercise Test; D005260:Female; D006304:Health Status; D006801:Humans; D008019:Life Style; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology; D010101:Oxygen Consumption; D010809:Physical Fitness / Q000502:physiology*; D012137:Respiratory System; D012885:Skinfold Thickness; D018709:Statistics, Nonparametric; D013997:Time Factors; D014186:Transportation