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The effect on cardiorespiratory fitness after an 8-week period of commuter cycling -- a randomized controlled study in adults [with consumer summary]
Moller NC, Ostergaard L, Gade JR, Nielsen JL, Andersen LB
Preventive Medicine 2011 Sep 1;53(3):172-177
clinical trial
5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

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 VO2max (mLO2/min) and cardiorespiratory fitness (mLO2/kg/min) were significantly improved in the cycling group when compared to the control group. Delta change in VO2max between groups equaled 206 mLO2/min (p = 0.005) and delta change in cardiorespiratory fitness equaled 2.6 mLO2/kg/min (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: VO2max and cardiorespiratory fitness were significantly improved and body fat reduced as a result of people engaging in 8 weeks of commuter cycling.
Copyright by Academic Press.

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