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Being fit enough to walk for around 130 minutes per week slashed heart disease
death risk by 50% -- even in men with high cholesterol -- according to a study
in Circulation.
"The message for men is that fitness counts and it is time to get in shape,"
says researcher Peter Katzmarzyk, PhD, in an American Heart Association news
release.
Cholesterol Study
Katzmarzyk is an associate professor at the School of Physical and Health
Education at Queens University in Kingston, Ontario.
He and his colleagues studied more than 19,000 men for a decade. The men had
gone to the Cooper Clinic in Dallas between 1979 and 1995.
At the clinic, the men filled out health questionnaires, got preventive medical
exams, and took an exercise test.
Some of the men had acceptable levels of LDL "bad" cholesterol. Others had high
cholesterol requiring lifestyle changes and/or medication.
Over the next 10 years, 179 men died of heart disease. As expected, men with
high cholesterol were more likely to die of heart disease than men with normal
LDL levels. But fitness shifted the odds a bit.
Fitness Findings
Men who were physically fit were half as likely to die of heart disease as unfit
men with similar cholesterol levels, the study shows.
How fit did the men have to be? Their fitness test scores translate to four or
five weekly workouts, each lasting 30 minutes. That's the equivalent of walking
for 130-138 minutes per week, write the researchers.
"We discovered that fitness is important across the board -- at every level of
cholesterol," says Katzmarzyk.
Most of the men were white, college-educated professionals. It's not known if
the results would be identical for men of other backgrounds or if participants'
fitness habits changed over time.
However, fitness is widely recommended as part of a healthy lifestyle. The CDC
recommends getting at least 30 minutes of moderate-intensity physical activity
five or more days per week or 20 minutes of vigorous-intensity activity three
or more times weekly.
Consult your doctor before starting a fitness program. Health care professionals
can also check your cholesterol levels and tailor a heart-health program to
suit your needs.
By Miranda Hitti
Reviewed By Kathleen Zelman, MPH, RD, July 25, 2007.
Medically updated July 25, 2007.
SOURCES: Ardern, C. Circulation , Aug. 30, 2005; Rapid
Access online edition. News release, American Heart Association. CDC: "Physical
Activity for Everyone: Recommendations."
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