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Walking not enough for significant exercise benefits

Walking is a popular form of exercise, but may not be enough to experience significant health benefits, a University of Alberta study shows.

"Generally, low-intensity activity such as walking alone is not likely going to give anybody marked health benefits compared to programs that occasionally elevate the intensity," said Dr. Vicki Harber, lead author on the Health First study, which was presented recently at the American College of Sports Medicine annual conference.

Dr. Harber and her colleagues, Dr. Wendy Rodgers, Dr. Gordon Bell and Dr. Kerry Courneya of the Faculty of Physical Education and Recreation at the University of Alberta in Edmonton, Canada, were concerned that while people with health issues are encouraged to increase their volume of activity such as walking, there didn't seem to be much focus on the effort that needed to go into the activity.

The University of Alberta study put the popularized pedometer-friendly 10,000-step exercise program to the test against a traditional fitness program which incorporated cardio-based activities on equipment such as treadmills and stationary bicycles. The traditional group was asked to complete exercise at a moderate intensity, a level allowing for one or two sentences of conversation with ease. Intensity was not set for the walking group; they completed their daily exercise at a self-selected pace.

"When we matched the two programs for energy expenditure, we found that the traditional fitness program improved aerobic fitness and reduced systolic blood pressure, more than the 10,000-step lifestyle program," Dr. Harber said. Of the 128 sedentary men and women who completed the six-month research program, those who took part in a more active traditional fitness regimen increased their peak oxygen uptake, an indicator of aerobic fitness, by 10 per cent. Those who took part in the walking program experienced a four per cent increase. Systolic blood pressure also dropped by 10 per
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Contact: Bev Betkowski
beverly.betkowski@ualberta.ca
780-492-3808
University of Alberta
20-Sep-2006


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