Metabolic States

Basal Metabolic Rate (BMR)
Resting Metabolic Rate (RMR)
Thermic Effect of Food (TEF)
Exercise-Induced Thermogenesis
Non-Exercise Activity Thermogenesis (NEAT)
Starvation Metabolism
Fed State Metabolism
Fasting State Metabolism
Ketogenic State
Anabolic State
Catabolic State
Definition
  • The rate of energy expenditure per unit time by endothermic animals at rest.
  • Similar to BMR but less strict with the conditions, encompassing small amounts of daily activity.
  • The energy required for the digestion, absorption, and disposal of ingested nutrients.
  • The increase in metabolic rate associated with physical activity.
  • The energy expended for everything we do that is not sleeping, eating, or sports-like exercise.
  • The metabolic response to a lack of food intake, where the body utilizes stored fats and eventually proteins for energy.
  • The metabolic state after the ingestion of a meal where nutrient absorption occurs.
  • The state where the ingested nutrients have been used up, and the body begins to use stored energy sources.
  • A metabolic state characterized by raised levels of ketone bodies in the body tissues.
  • The state where the building of tissues and muscle occurs, utilizing energy to create complex molecules.
  • The state of breaking down complex molecules into simpler ones, releasing energy.
Conditions
  • Usually measured in a neutral thermal environment while the individual is in a post-absorptive state.
  • Includes energy expended while at rest, not necessarily in a post-absorptive state.
  • Measured after the consumption of a meal, considering the energy used in processing the food.
  • Focus on different forms of physical activity and their impacts on metabolic rate.
  • Everyday activities such as walking, typing, performing yard work, undertaking agricultural tasks, etc.
  • Occurs under circumstances of food deprivation and fasting.
  • Includes periods shortly after meals, focusing on the synthesis of energy storage molecules.
  • Generally occurs several hours after the ingestion of food, leading to the breakdown of stored glycogen and fats.
  • Commonly induced by a diet low in carbohydrates and high in fats.
  • Involves processes where smaller molecules are built up into larger ones, often during periods of growth or after exercise.
  • Involves the breakdown of tissues, often occurring during fasting, physical exertion, or illness.

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