NUSCTX 10 Lecture Notes - Lecture 20: Weight Loss, Neurohormone, High-Protein Diet
11 Apr 2016
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Document Summary
Boundary model of herman & polivy (1984) (1) genetics: determines setting zone on the scale of body weight (2) biological regulatory mechanism: activated when weight exceeds or drops below the setting zone. Some people are predisposed with gene to be energetically thrifty expend less energy than others at rest or during activity. Fertility, for reproduction: even with low energy intake, women can have successful pregnancies (in areas of poverty) Body is designed to maintain weight within a narrow range, or at a set point . In many cases, body appears to respond to maintain person"s weight. Critique: set point can change, minnesota starvation experiment. Make feel more full so not eat as much, protein and fat breakdown requires more energy: these diets contain about 55-65% energy intake as fat, less than 100g carbohydrate per day, with balance of intake as protein. Weight loss occurs when intake is lower than expenditure: 20-30% energy intake as fat, 55-60% carbohydrate, 15-20% protein.
