BMI
BMI: definition
Body Mass Index. A simple calculation using height and weight (kg/m²) that categorises people as underweight, normal, overweight, or obese. Useful as a population-level metric but doesn't account for muscle mass.
What BMI means in practice
Body Mass Index. A simple calculation using height and weight (kg/m²) that categorises people as underweight, normal, overweight, or obese. Useful as a population-level metric but doesn't account for muscle mass.
Use the definition as a starting point, then connect it to your programme, exercise selection, nutrition targets, or progress data.
Related Terms
BMI: quick questions
What does BMI mean?
Body Mass Index. A simple calculation using height and weight (kg/m²) that categorises people as underweight, normal, overweight, or obese. Useful as a population-level metric but doesn't account for muscle mass.
Why does BMI matter in fitness?
Understanding BMI makes it easier to follow programmes, interpret coaching instructions, and make informed training or nutrition decisions.
Where can I learn more about BMI?
Continue with the related concepts TDEE, Body Fat Percentage or browse the LumaFit exercise, programme, and calculator libraries.
Your next step
Build a routine that works in real life.
Bring your training, nutrition, programmes and progress together in LumaFit.