Effects of active commuting to work for 12 months on cardiovascular risk factors and body composition.

Active commuting has the potential to decrease cardiovascular risk by increasing physical activity. We aimed to investigate the effects of active commuting to work for 12 months on body composition and cardiovascular risk factors. Therefore, 73 hospital employees (age: 46+/-9 years, 36% males), with a predominantly passive way of commuting were randomly assigned to an intervention group (IG) and a control group (CG) in a 2:1 fashion. The IG was further divided into a public transportation plus active commuting group (IG-PT) and a cycling group (IG-C). Both IGs were prompted to reach 150min/week of moderate intensity exercise. Daily self-reported commuting details were verified by GPS-tracking. All subjects underwent assessment of body composition, resting blood pressure, glycaemic control and lipid profile at the beginning and end of the study. Data for final analyses were available in 62 subjects. Commuting details indicated that the subjects randomized to IG changed their commuting habits. HbA1c decreased by 0.2% [95%CI: -0.3, -0.2] in IG-PT but was not statistically different between groups (p=0.06). LDL-cholesterol decreased in IG-C by 0.8 mmol/L [-1.1, -0.4] and by 0.6 mmol/L [-1.2, 0.1] in IG-PT which can be considered biologically relevant but did not yield statistical significance. Body composition and blood pressure did not differ between groups. Active commuting to work for 12 months did not change body composition but yielded relevant changes in lipid profile and glycaemic control. Health benefits of active commuting should be addressed by health care professionals when counseling individuals that seek to improve their cardiovascular risk profile.