Re: Aerobic, Weight Training Combo Best Against Diabetes

In article <1885@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
DZ <29201@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Hobbes <khobman800@xxxxxxxxx> wrote:
"Hard Bop Drums" <nospam@xxxxxxxxxxxxxxxx> 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.

You think that combining weight training with aerobic work would not have
shown any significant difference than the 2 by themselves? I'm willing to
bet that the difference would have been quantitative, but not radically
different. I know that from personal experience and from training other
people that the combo is more productive than the 2 stand alones.

Perhaps, but the point is that you've got two groups exercising 135
minutes a week and one exercising 270. I think you could have taken
either type of training and doubled it and there would have been a
significant difference. It is a crappy study design and they shouldn't
have come to the conclusion they did. You don't know if it is the type
of exercise (combination) or simply the duration that causes the
difference.

They observed twice the effect for the combined exercise. So the
conclusion is that the two types of exercise act in perfectly additive
manner. This conclusion is well supported by their study. It's
unlikely that doubling the time of either type would give a similar
result. The duration of aerobic (uninterrupted effort) and that of
resistance (with rests between sets) can't be compared anyway.

You can't make that 'unlikley' assumption on the basis of the study
shown. There is a bunch of recent research into adaptations from
training (especially those regarding what is happening in bone tissue)
that indicate just how complex that area is. The fact that you like to
combine cardio and resistance training doesn't mean it is the 'best'. I
do much the same thing, although my cardio is interval in nature.

It is a crappy conclusion to draw from that study. They could have
easily designed the study to test equal duration exercise - and should
have. And should still.

--
Keith
.

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