Re: Aerobic, Weight Training Combo Best Against Diabetes

In article <26252@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
DZ <19892@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Steve <nomail@xxxxxxx> wrote:
http://www.time.com/time/health/article/0,8599,1662683,00.html
http://www.nlm.nih.gov/medlineplus/news/fullstory_54920.html
http://diabetes.webmd.com/news/20070917/exercise-and-diabetes-best-bets

"The elegantly designed study, led by researchers at the University of
Calgary and the University of Ottawa, involved 251 patients aged 39 to
70, with type 2 diabetes. The patients, none of whom were regular
exercisers, were randomized to one of four groups: aerobic exercise,
resistance training, a combination of both, or none. For 22 weeks, the
aerobic group worked out for 45 minutes three times a week on the
treadmill or stationary bicycle; the resistance-training group spent
an equal amount of time on weight machines. The combination group was
at the gym twice as long as the other two exercise groups, doing the
full aerobic plus weight-training regimens."
...
"The bottom line: "There is additional value to doing both resistance
and aerobic exercise," according to Sigal."

Elegantly designed? Not really. It shows is that twice as much
exercise is better.

It would have been interesting to have a group do 1/2 cardio and 1/2
weights, spending the same total amount of time as the other two
groups. I bet the additional value would have been insignificant.

There is also duration, not just proportions. If they had the
resources, they would probably add two 90 min groups, 90 min aerobics
and 90 min resistance. But given limited resources, they made the
choice based on the optimal duration argument. The choice relies on
some sort of diminishing returns for either prolonged aerobics or
resistance training.


Others agree that the results are unclear:
http://www.medpagetoday.com/Nephrology/Diabetes/tb/6715

"However, the study was not designed to determine the effect of
exercise intensity, duration, or volume, the researchers noted.

This made it unclear whether the extra benefit from combined exercise
was because of the additional amount of time spent exercising or by
altering glucose tolerance through complimentary mechanisms, Drs.
Klaus and Levine cautioned. Further study may be needed to answer this
question, they said.

Furthermore, the participants were "probably more adherent to exercise
and healthier on average than the general population with type 2
diabetes," Dr. Sigal and colleagues said."
.

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