KIN 155 Lecture Notes - Lecture 12: Resting Metabolic Rate, Weight Loss, Weight Gain
Document Summary
Organisms have internal mechanism to regulate body fat/weight to a certain value. Body does have regulatory mechanisms to reduce weight gain/loss, but . Weight drifts around the equilibrium as a result of physical activity and diet patterns. A combination of genetics, environment, behavior, etc . Men: 66+ (13. 8 x kg) + (5 x cm) - (6. 8 x age) Women: 655 + (9. 6 x kg) + (1. 8 x cm) - (4. 7 x age) ~10% or less- thermic effect of food. We often blame genetics, but obesity has skyrocketed over last 20 years. Gene pool cannot be altered that fast. Genetics/ genetic variables can contribute, but environmental factors make them much more noticeable. Role of physical activity in obesity in the united states. Energy intake has not changed enough to explain all weight gain. Most people only consider leisure time activity as reportable, so it is hard to quantify change in physical activity levels. Non leisure time physical activity has decreased.