Physical Inactivity, Obesity, and Type 2 Diabetes: An Evolutionary Perspective

Physical inactivity (and unhealthy nutrition) has distorted body composition and, in turn, reordered the proportions of myocyte and adipocyte insulin receptors. Insulin acting on adipocyte receptors produces less glucose uptake than does comparable interaction with myocyte receptors. Accordingly, in...

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Bibliographic Details
Published inResearch quarterly for exercise and sport Vol. 88; no. 1; pp. 1 - 8
Main Authors Eaton, S. Boyd, Eaton, Stanley B.
Format Journal Article
LanguageEnglish
Published United States Routledge 02.01.2017
Subjects
Adipocytes - metabolism
Adipose Tissue - metabolism
Animals
Biochemistry
Blood Glucose - metabolism
Body Composition
Diabetes
Diabetes Mellitus, Type 2 - etiology
Diabetes Mellitus, Type 2 - prevention & control
Diabetes Mellitus, Type 2 - therapy
Drug Therapy
Exercise
fat-muscle index (FMI)
Health Promotion
Human Body
Humans
Hyperinsulinism - complications
insulin resistance
Insulin Resistance - physiology
Life Style
Muscle Cells - metabolism
Obesity
Obesity - complications
Physical Activity Level
Prevention
Receptor, Insulin - metabolism
Sedentary Lifestyle
fat-muscle index (FMI)
exercise
insulin resistance
Body composition
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Summary:Physical inactivity (and unhealthy nutrition) has distorted body composition and, in turn, reordered the proportions of myocyte and adipocyte insulin receptors. Insulin acting on adipocyte receptors produces less glucose uptake than does comparable interaction with myocyte receptors. Accordingly, in individuals with disproportionate muscle/fat composition, any given glucose load requires greater-than-normal pancreatic insulin secretion for adequate disposal. This hyperinsulinemia then becomes the leading cause of type 2 diabetes (T2DM) as insulin-sensitive tissues become desensitized. Because T2DM is rooted in potentially reversible lifestyle factors, rather than focusing on the intricacies of glucoregulation at the molecular level and on testing new drugs to control blood sugar, this article calls for a new prevention and treatment paradigm, in which exercise and weight control are essential and for which an inexpensive and acceptably accurate measure of body muscle and fat proportions is needed.
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ISSN:0270-1367
2168-3824
2168-3824
DOI:10.1080/02701367.2016.1268519