Are You Overweight? Ride Your Bike to Work to Reduce Body Fat

Riding the bike to work can reduce fat mass in overweight and inactive individuals. Bike riding could be as effective as exercising in a fitness centre.

Overweight and inactive individuals can lose fat mass by riding their bike to work, which is as effective as exercising in a fitness centre, reveals a new study.

The study was done by the research team from the Department of Biomedical Sciences at the University of Copenhagen in a study that has just been published in the scientific journal International Journal of Obesity.

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‘Overweight and inactive individuals can ride their bikes to work to reduce fat mass, which is like exercising during leisure time.’

'This is good news to the many overweight people who may not have the time or inclination to join a fitness centre, because they also have to pick up their children and cook dinner after work. Our results show that it is possible to combine transport to and from work with effective physical exercise', says Professor and Head of Department Bente Stallknecht.

The study involved 130 overweight people with a BMI of 25-35 kg/m2. A criterion for participating in the study was they were not too active or muscular based on a series of parameters like body fat percentage, maximum oxygen uptake and level of physical activity.

The participants were divided into four groups of which one had to ride the bike to and from work. Two other groups had to do physical exercise five times a week, one at high intensity, the other at moderate intensity. The last group could make no changes and thus functioned as the control group.

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The groups that cycled and were physically active during their leisure time burned the same amount of calories a week during these activities; only the intensity and form of physical exercise varied. Throughout the test - using the heart rate monitors, among other things - the researchers checked that the participants met the requirements and did the physical exercise they were asked to do.

After six months all groups, except for the control group, had less fat mass. The fat mass had been reduced by 4.5 kg (compared to the control group) in the group doing high-intensity leisure time exercise, by 2.6 kg in the group doing moderate-intensity leisure time exercise and by 4.2 kg in the group riding the bike to work. The difference between the three physically active groups was only statistically significant between the two groups doing leisure time exercise.

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'All forms of physical exercise are better than the control group, but high-intensity exercise is statistically better than moderate-intensity exercise. And riding the bike to and from work is at least as effective a means for reducing fat mass as exercising during your leisure time', says Research Assistant Jonas Salling Quist from the Department of Biomedical Sciences who participated as PhD student and author of the study.

Facts about the study

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130 participants randomly divided into four groups: a cycling group, two leisure time exercise groups doing high-intensity and moderate-intensity physical exercise, respectively, and a control group.

The participants were 20-45 years old, lived in Greater Copenhagen and had a BMI of 25-35 kg/m2.

The cycling group participants cycled an average of 14 kilometres per day. The high-intensity group exercised approx. 35 minutes per day and the moderate-intensity group exercised 55 minutes per day.

High-intensity exercise was defined as 70 percent of the maximum oxygen uptake, while moderate-intensity exercise was 50 percent.

The duration of the exercise was six months, and the participants were asked to exercise five times a week. The energy expenditure doing leisure time exercise and cycling measured in kcal per week was the same in all three intervention groups.

Source-Eurekalert