EatrightPREP Registered Dietitian (RD) Practice Exam

Which activity factor is used to estimate energy needs for a sedentary lifestyle?

1.0 1.4 1.2 1.6

Correct Answer:

1.2

Explanation:

Estimating energy needs uses a multiplier that reflects how active a person is beyond rest. You multiply resting energy expenditure by an activity factor to get total energy needs. For a sedentary lifestyle, the appropriate factor is 1.2 because there is little activity beyond basic daily living, so energy expenditure is only moderately higher than resting levels. A factor of 1.0 would imply almost no activity beyond rest, which isn’t realistic for everyday life; 1.4 corresponds to light activity, and 1.6 to moderate activity. So, 1.2 best matches a sedentary pattern.

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