The greatest contributor to the average persons daily energy expenditure is:

Question

BlackTom AI · Accepted Answer

The question asks about the largest contributor to the average person’s daily energy expenditure.
Option a: Resting metabolic rate. This is typically the largest component of daily energy expenditure, accounting for roughly 60–75% in many individuals. It reflects the energy required for basic physiological functions at rest (breathing, circulation, cell maintenance, etc.). Therefore this option is consistent with standard metabolic research.
Option b: Thermal effect of a meal. TEF represents the energy cost of digesting, absorbing, and processing nutrients, and usually makes up about 5–10% of total daily energy expenditure. It is a smaller component compared to resting metabolic rate.
Option c: Non-exercise activity thermogenesis (NEAT). NEAT includes energy expended in everyday activities other than deliberate exercise (fidgeting, posture, incidental movements). While NEAT can vary considerably between individuals and can be sizable in some people, on average it is less than resting metabolic rate and TEF across the population.
Option d: Exercise. Energy expended during formal exercise is typically the smallest component for most people when looking at daily totals, though it can be substantial for athletes. In the general population, it contributes a modest portion compared with RMR.
Taken together, the largest and most stable contributor to daily energy expenditure is resting metabolic rate, while the other components are smaller and more variable depending on diet, activity level, and individual differences.

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The main contributor to daily energy expenditure for the average person is the:

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