Is BMR the same as maintenance calories?
No. BMR is resting energy use. Maintenance calories are higher because they include movement, exercise, and the energy cost of daily living.
Short answer
BMR is your basal metabolic rate, or the energy your body needs at rest. It is not your maintenance calories and it is not your fat-loss target. It is the starting layer of the estimate. Activity, body composition, and real-world weight trends still matter after that first number appears.
指南內
怎麼看 BMR
BMR 在說什麼
BMR 是身體在安靜狀態下的基本消耗。它不是你一天的全部消耗，但它是之後所有估算的底子。
怎麼理解這個數字
BMR 只是一部分，活動量和目標也要一起算進去。這樣看出來的每日熱量，才更接近現實。
常見誤區
很多人會把 BMR 當成每天一定要吃的固定值，其實它只是起點。真正要看的，是加上活動量之後的總量。
下一步看什麼
先看懂 BMR，再去看每日目標，就會更清楚自己為什麼會落在那個熱量範圍裡。
BMR FAQ
Which BMR equation is usually used in calculators?
Many calculators use Mifflin-St Jeor because it has been one of the better-performing practical equations in comparative reviews. Some tools also offer lean-mass-based formulas when body-fat data are available.
Why can two people with the same BMR need different calorie intakes?
Because daily expenditure is shaped by movement, work, training, and sometimes body-composition differences that a basic equation cannot fully capture. BMR is only the resting layer.
Should I eat at my BMR to lose weight?
Usually not. For most people that would be more restrictive than necessary because BMR is lower than maintenance. A workable fat-loss target is generally set below maintenance, not at the resting floor.
Research and sources
Mifflin MD, et al. A new predictive equation for resting energy expenditure in healthy individuals.
Original paper describing the Mifflin-St Jeor equation.
Frankenfield D, Roth-Yousey L, Compher C. Comparison of predictive equations for resting metabolic rate in healthy nonobese and obese adults: a systematic review.
Systematic review concluding that Mifflin-St Jeor was the most reliable of the commonly used equations studied.
Hall KD, et al. Quantification of the effect of energy imbalance on bodyweight.
Shows why energy expenditure changes as body weight changes instead of staying fixed.
Müller MJ, Bosy-Westphal A. Adaptive thermogenesis with weight loss in humans.
Useful background on why measured expenditure can drop during weight loss beyond what a simple equation predicts.