High GI Vs Low GI Carbs Study

[The Solution]

Conclusions and Relevance In this 5-week controlled feeding study, diets with low glycemic index of dietary carbohydrate, compared with high glycemic index of dietary carbohydrate, did not result in improvements in insulin sensitivity, lipid levels, or systolic blood pressure. In the context of an overall DASH-type diet, using glycemic index to select specific foods may not improve cardiovascular risk factors or insulin resistance.


http://jama.jamanetwork.com/article....icleid=2040224

[cdoussett]

Thank you for posting this, I was reading it yesterday. All 163 participants were overweight (this criterion along with a high BP were connecting variables)and one interesting outcome was the triglycerides, "In the primary diet contrast, the low–glycemic index, low-carbohydrate diet, compared with the high–glycemic index, high-carbohydrate diet, did not affect insulin sensitivity, systolic blood pressure, LDL cholesterol, or HDL cholesterol but did lower triglycerides from 111 to 86 mg/dL (−23%, P ≤ .001)." Any thoughts on if this same study were performed on adults with a healthy BMI and BP or bodybuilders?

[davidcua]

Conclusions and Relevance In this 5-week controlled feeding study, diets with low glycemic index of dietary carbohydrate, compared with high glycemic index of dietary carbohydrate, did not result in improvements in insulin sensitivity, lipid levels, or systolic blood pressure. In the context of an overall DASH-type diet, using glycemic index to select specific foods may not improve cardiovascular risk factors or insulin resistance.


http://jama.jamanetwork.com/article....icleid=2040224

Thats why they only do a 5 week study.

If they did it over a period of one year ore 3 years, I'm pretty sure it would have result in a completely different outcome

[The Solution]

Yup, thats why you can only take science with a grain of salt
Almost no studies are done on bodybuilders in a regular study, and if so it would cost a lot to fund as they are not cheap.

Health BMI or BP unsure, but again just some info out there for others to read.

Thats why they only do a 5 week study.

If they did it over a period of one year ore 3 years, I'm pretty sure it would have result in a completely different outcome

[cdoussett]

It would be very interesting to have a one year or three year study and one with bodybuilders. Alas, tis not so...

[The Solution]

It would be very interesting to have a one year or three year study and one with bodybuilders. Alas, tis not so...

The cost to run a 1 year study and keep the subjects for one year alone would be very time demanding and exceed possibly upward to a million dollars.

[cdoussett]

Yes, I know it would be, I was implying if we had all the money and time needed. Quantitative studies are not a complete waste in the shorter time frames as long studies tend to regress towards the mean the longer they go on. I am preparing a qualitative study looking at the phenomenology of OTC supplements in adolescents. Hopefully within a year (depending on IRB) and it will probably take about 5 weeks to collect the data from all the sites. Anyway, in a perfect world it would be cool to conduct all these studies....I'm in.