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  #1  
Unread 07-03-2009, 12:35 PM
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Default Glycaemic Index Effects on Fuel Partitioning in Humans - Research Review

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Unread 07-03-2009, 12:44 PM
SturmBG SturmBG is offline
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Bad link, but damn it you don't rest for a day!
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Unread 07-03-2009, 01:01 PM
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try it now
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Unread 07-03-2009, 01:55 PM
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waltmiller waltmiller is offline
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Lyle, as usual, another great topic and analysis/discussion.

One question that comes to mind is whether they showed if insulin is elevated for a longer time period for low GI foods?

If so, then would eating low GI foods all day long cause steady elevated insulin levels that shut off lipolysis?
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Unread 07-03-2009, 02:01 PM
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They did look at this, I didn't have space to cover it.

in one of the studies, they compared 50 grams glucose to 50 grams starch. Fatty acids were supressed identically up to the 3 hour mark but after that, while blood FA levels returned to bsaeline in the starch group, they rebuonded do double fasting levels in the glucose group.

In a related study they gave 50 grams of glucose either all at once or sipped (to mimick a lot GI meal). In the 50 grams all at once, insulin spiked, blunting fatty acid levels. But FA level rebouned to above fasting levels in the glucose group whereas they stayed supressed in the low GI group.

OF course, this has to be weighed against other stuff such as hunger (e.g. crashing blood glucose can stimualte hunger) and counterregulatory hormonal responses.

But it is contradictory to what most people think should happen.
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Unread 07-03-2009, 05:14 PM
Adrian_A Adrian_A is offline
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Quote:
Originally Posted by lylemcd View Post
They did look at this, I didn't have space to cover it.

in one of the studies, they compared 50 grams glucose to 50 grams starch. Fatty acids were supressed identically up to the 3 hour mark but after that, while blood FA levels returned to bsaeline in the starch group, they rebuonded do double fasting levels in the glucose group.

In a related study they gave 50 grams of glucose either all at once or sipped (to mimick a lot GI meal). In the 50 grams all at once, insulin spiked, blunting fatty acid levels. But FA level rebouned to above fasting levels in the glucose group whereas they stayed supressed in the low GI group.

OF course, this has to be weighed against other stuff such as hunger (e.g. crashing blood glucose can stimualte hunger) and counterregulatory hormonal responses.

But it is contradictory to what most people think should happen.


Do you think you could you screw up the alpha inhibition in the stubborn fat solution by having 90g/day, but all in the space of 5 hours?

"3-4 days of Constant exposure to fatty acids" etc...
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Unread 07-03-2009, 02:49 PM
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Quote:
Originally Posted by waltmiller View Post
Lyle, as usual, another great topic and analysis/discussion.

One question that comes to mind is whether they showed if insulin is elevated for a longer time period for low GI foods?

If so, then would eating low GI foods all day long cause steady elevated insulin levels that shut off lipolysis?
I would think that simply eating food all day long would shut off lypolysis, as it would be hard to be in a deficit while eating so often.
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Unread 07-03-2009, 02:51 PM
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So let's say I'm eating 1800 calories/day which is a nice deficit

ARe you saying that I can't eat 6X300 calorie meals across the span of waking hours? I'm eating frequently, still in a deficit.
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