Both provide a separate estimate for men and women. The ACE provide two equations that people can use to calculate their RMR: the Revised Harris-Benedict BMR equation, and the Mifflin-St Jeor equation. This technique will still estimate the number of calories a personвЂ™s body burns at rest but is much less restrictive Calculating RMR As a result, it is unlikely that a person could accurately calculate their BMR at home.ДЄs a simpler alternative, people can try calculating their RMR. Experts refer to this analysis as вЂњcalorimetry.вЂќ It is a way of measuring the number of calories a personвЂ™s body is using.ДЄccording to the American Council on Exercise (ACE), people rarely use BMR outside of clinical settings because the test must take place in a tightly controlled environment under stringent testing parameters. Because the testing conditions of measuring the RMR are less stringent than those required to measure the BMR, the RMR may be slightly less accurate than the BMR.Д«MR calculations involve analyzing the amount of oxygen and carbon dioxide a person breathes in and out. People do not need to fast or rest for an extended period in a controlled environment to get an estimate. The RMR estimates the number of calories a person burns during a period of inactivity. undergoing monitoring in a darkened, temperature-controlled room.sleeping for 8 hours prior to testing upon waking.However, to get an accurate estimate, a person must undergo monitoring in a clinical setting under tightly controlled conditions.

The BMR estimates the minimum number of calories a person needs each day to sustain their basic life functions should they rest for the entire 24 hours of a day. However, the two tests differ slightly in what they estimate and what the test involves. People often use the terms BMR and RMR interchangeably.

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