Carve
BMR (Basal Metabolic Rate)
BMR plus activity and TEF = total calories; measure with weight trends, not calculators alone.
What is BMR?
Basal Metabolic Rate (BMR) is the energy your body uses at rest to sustain vital functions. It forms the largest part of daily calorie needs for most people.
How does it work?
BMR depends on body size, lean mass, age, sex, and genetics. It changes with weight and body composition. Activity (exercise + NEAT) and the thermic effect of food add to total expenditure. Dieting lowers total burn via weight loss and reduced movement, not usually through massive BMR crashes.
Practical application
Use equations as a starting point, then track 2-3 weeks of intake and weight to infer true needs. Preserve lean mass with lifting and 1.6-2.2 g/kg Protein to support BMR. Avoid extreme deficits that reduce energy, steps, and training output. Reassess after significant weight change.
- BaselineUse a calculator only as a start; validate with scale trends.
- Lean massLift and eat protein to support BMR while dieting.
- AdjustRecalculate needs after sizable weight change or activity shifts.
Common mistakes
- Believing BMR is “broken” rather than accounting for lower weight/NEAT.
- Using calculators without checking against real-world weight change.
- Extreme dieting that slashes energy and movement, lowering total burn.