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WALKING TO IMPROVE YOUR
FITNESS, HEART HEATH AND MOOD
SHORT BRISK WALKS
The American
College of Sports Medicine (ACSM) has released a study that provides
new information comparing the health benefits of accumulated short
brisk walks with longer exercise programs. "Sticking," or adherence,
to a structured exercise program is very difficult for a sedentary
person just beginning to become physically active. Some studies
suggest that several short bouts of exercise, at varied times
throughout the day, may confer the same health benefits as a longer
program. Researchers at the University of Ulster in Jordanstown,
Northern Ireland, knew that aerobic fitness could be improved with
short brisk walking, but found little evidence in relation to other
health-related outcomes such as blood lipids or psychological
health. They designed a multidisciplinary study that would test
whether short bouts could confer the same benefits as longer
programs.
"People drop
out of exercise programs based on regular 30-minute activity
periods," said Marie Murphy, Ph.D., lead researcher on the study.
"We thought a series of brisk 10-minute activity periods could
collectively have the same beneficial results, and wanted to find
out more. Exercising in shorter time periods throughout the day
could be more attractive and encourage individuals to participate
more readily." The researchers designed a six-week training period
that compared long (30 minute) bouts of walking with three short
(10-minute) sessions.
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Noting that
walking is a popular and readily accessible form of moderate
intensity physical activity, the researchers designed a study
incorporating a crossover between the two patterns over the six-week
period. They recruited sedentary (meaning not having engaged in more
than 20 minutes of planned exercise a week during the previous
90-day period) men and women in their mid-forties, ultimately using
a test group of 21 individuals. Measurements were taken on four
occasions. A baseline of height, waist/hip circumference, skin fold
thickness, blood pressure, cholesterol, heart rate, maximal oxygen
uptake, and psychometric inventory measurements were established,
and then followed up at the end of the first walking program, before
the second program, and on completion of the second program.
The study
subjects monitored their own training, performing the walking
programs outside near the campus or their homes. They checked and
reported their own heart rates and were available for the other
assessments at the appropriate intervals. Although readiness to take
up an exercise program sometimes coincides with motivation to
improve other health behaviors, the participants in this study
agreed not to modify their diets or alter their health behavior in
any other way.
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After
collecting and analyzing the data, the researchers found that both
patterns of brisk walking resulted in improved aerobic fitness, as
expected. They also found that brisk walking, in both long and short
accumulated bouts, can alter body fat distribution, which may be
expected to reduce the risk of cardiovascular disease. They found
that both patterns of brisk walking lead to a decrease in diastolic
blood pressure. Significant reductions in feelings of tension and
anxiety were found with brisk walking of both patterns. Maximal
oxygen uptake increased more with short bouts than with long,
however.
Because
adherence was one of the most important reasons for undertaking this
research, study facilitators note that while the present work
indicates positive health benefits from both short and long bouts of
brisk walking, future studies should consider whether starting with
a short bout of walking will motivate adherence to a longer activity
program. "It may be a useful stepping stone," said Murphy. "But it
is yet to be discovered whether long-term adherence results."
Please take the time to check out the
rest of our website for more detailed information about the college
recruiting process.
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Lester Munson, an associate editor at Sports Illustrated, will
deliver the keynote address, which will focus on the growing trend
of anger and violence in youth
sports. Munson is an award-winning writer and a member of the Illinois Bar
Association.
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