| | Barry Sears: Bser or Liar | | by: Coach Hale - Thu Jan 07 2010, 11:17AM | Barry Sears, claims that Nutrition researchers and popular dietary advise are all wrong. Weight loss is not about calories it’s about hormones, particularly insulin manipulation. According to an abdundant amount of scientific data Barry Sears is wrong. Has Sears reviewed the research? Can he read scientific research? Is he a Bser or Liar? –refer to Bser or Liar? http://www.thebsdetective.com/2009_12_01_archive.html
Maybe he is suffering from serious Cognitive Dissonance
http://www.spring.org.uk/2007/10/how-and-why-we-lie-to-ourselves.php
Enter the Zone created by Barry Sears, PhD.
The plan suggests that every meal should be composed of 40% carbohydrate, 30% protein and 30% fat. The goal is to control insulin levels and prevent the overproduction of bad eicosanoids (group of compounds derived from polyunsaturated fatty acids that have several biologically important actions). Sears claims high GI (glycemic index) Index foods cause obesity.
My thoughts: Enter the Zone
There is no magic macronutrient percentage. People have done fine (weight loss and functionally) following diets that include a wide range of macronutrient percentages. The information regarding insulin is incomplete and mis-leading. Insulin has numerous roles in metabolism, even when insulin levels are high if you are in a calorie deficit weight gain does not occur. Suggesting that the consumption of high GI- carbohydrates make you fat is incorrect. Most people find it difficult and time consuming to calculate the macro percentage of every meal
The diet is generally nutritious. The diet also promotes the consumption of monounsaturated fatty acids, which can have numerous health benefits. But, the question remains- Is Sears a Bser or Liar? I think he may be a former Bser turned Liar, recovering Bser.
S Cheuvront, from Department of Nutrition, Food, and Exercise Sciences, Florida State University, says:
The notion that a 40/30/30 diet can alter the pancreatic hormone response in favour of glucagon is also unfounded. The Zone is a mixed diet and not likely to affect pancreatic hormone release in the same way individual nutrients can. Although the postprandial insulin response is reduced when comparing a 40% with a 60% carbohydrate diet, it is still a sufficient stimulus to offset the lipolytic effects of glucagon.
Many of the promised benefits of the Zone are based on selective information regarding hormonal influences on eicosanoid biology. Contradictory information is conveniently left out. The principle of vasodilating muscle arterioles by altering eicosanoid production is notably correct in theory. However, what little human evidence is available does not support any significant contribution of eicosanoids to active muscle vasodilation. In fact, the key eicosanoid reportedly produced in the Zone and responsible for improved muscle oxygenation is not found in skeletal
muscle. Based on the best available scientific evidence, the Zone diet should be considered more ergolytic than ergogenic to performance.
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