l****z
发帖数: 29846 | 1 WASHINGTON—Combining aerobic exercise and resistance training lowered blood
-sugar levels in people with Type 2 diabetes, a new study has found.
The same improvement in glycemic levels wasn't seen among patients who
performed aerobic exercise or resistance training alone, according to the
study, which will be published in this week's Journal of the American
Medical Association.
Patients who walked and lifted weights also lost more fat and trimmed their
waistlines more than people who did just one type of exercise even though
the time devoted to exercising was similar—findings researchers said apply
to everyone.
Although it's accepted that regular exercise provides big benefits for
people with Type 2 diabetes and helps many reduce the use of diabetes
medications, the exact exercise type has been unclear.
Type 2 diabetes is characterized by high blood-glucose levels caused by the
body's inability to either make or properly use insulin and is often
associated with older age and weight gain. (Type 1 diabetes is an autoimmune
disease often diagnosed in children in which the body's immune system
destroys pancreatic beta cells that produce insulin.)
The study's lead researcher, Timothy S. Church, a doctor and exercise
researcher at the Pennington Biomedical Research Center, Louisiana State
University System in Baton Rouge, explained that the combination of
resistance training and aerobics works muscles in different ways and
provides more benefit than doing each type of exercise alone. Muscles
consume sugar and stronger muscles leave less sugar in the blood, which is
of particular benefit to people with diabetes.
"I think our results apply to everybody personally," Dr. Church said. "
Muscle is happiest when you do aerobic exercise and resistance."
The study involved 262 sedentary people with Type 2 diabetes to look at
whether a nine-month exercise program had an impact on A1C blood hemoglobin
levels, a common measurement of blood glucose, or blood sugar. A1C measures
the average blood sugar over about three months.
About 73 people each were assigned to one of three exercise groups while a
fourth group of about 40 patients were non-exercisers and used as a
comparison group.
One group walked on a treadmill for a total of 150 minutes a week, and
another group lifted weights three times a week. The exercises consisted of
two sets of nine exercises targeting the upper body, abdomen and legs. Each
set consisted of 10 to 12 repetitions.
The third exercise group walked for about 110 minutes a week and lifted
weights twice a week by doing one set of nine exercises. The three groups
were designed to expend about the same amount of energy.
All of the exercise was supervised, and the weight training involved the use
of machines. Patients in the study were about 56 years old on average,
overweight and were considered sedentary upon study entry. The average
hemoglobin A1C was 7.7%.
After nine months, the absolute change in hemoglobin A1C for the combination
exercise compared to the non-exercise group was a statistically significant
drop of 0.34%. Such declines in A1C reduce the risk for diabetes
complications including cardiovascular disease, kidney disease, nerve and
eye damage.
While those in the aerobic-exercise group and those in the resistance
training, or weight-lifting group, had small declines in hemoglobin A1C
compared to non-exercisers, the changes were not considered statistically
significant.
Dr. Church noted that the changes in A1C were seen despite increases in the
use of diabetes medications meant to control blood sugar among patients in
the non-exercise group and decreases in medication among those in the
exercise groups.
Although study participants lifted weights in a gym, Dr. Church said,
resistance training can be done outside of a gym with free weights,
resistance bands or tubing and using one's own body to do things like
abdominal crunches and push-ups.
The study was funded by the National Institutes of Health. Dr. Church has
overseen other studies funded by pharmaceutical firms, including Sanofi
Aventis SA and Amylin Pharmaceuticals Inc. | g*****j
发帖数: 1211 | |
|
