How to use this checklist
Check off the 11 items across Lean Body Mass, Body Fat %, Muscle Mass, and Measurements. The Measurement items — knowing your waist circumference and especially waist-to-height ratio — are the highest-value at-home metrics on the list, since they predict cardiometabolic risk more strongly than weight or BMI alone. Don't check items you haven't actually measured.
What your result means
70%+ indicates a strong, ongoing understanding of your body composition. 40-69% typically signals gaps — most often unknown body fat percentage or unmeasured waist. Below 40% suggests key metrics are untracked. The reference ranges embedded in the items: healthy body fat is roughly 10-22% for men and 20-32% for women, and a waist-to-height ratio under 0.5 is linked to substantially lower cardiovascular and metabolic risk. Weight alone doesn't capture these — two people at the same weight can have very different risk profiles based on fat distribution and muscle mass.
When to trust it
At-home body-fat measurement is imprecise — bioelectrical impedance scales (typical smart scales) can vary 5-8 percentage points based on hydration, time of day, and device. DXA scans, hydrostatic weighing, and Bod Pod are far more accurate but cost more and aren't necessary for most people. Visceral fat (stored around the organs, approximated by waist circumference) is more dangerous than subcutaneous fat. For athletes or anyone making decisions based on body composition, a sports-medicine clinic or registered dietitian can interpret DXA results in context.
Frequently Asked Questions
Why did my weight go up but I look leaner?
Classic recomposition, especially in strength-training newcomers: muscle gained while fat lost can hold or raise the scale while inches drop. Muscle is denser than fat, so the same-weight-you takes less space — that's why clothes and photos tell a truer story than the scale during body recomposition phases. If your waist measurement is shrinking and strength is rising, the scale going the 'wrong' way is a success signal, not a failure.
Which number should I actually track: weight, BMI, or body fat?
For most people: weight plus waist circumference, tracked weekly. Weight is precise and easy but composition-blind; waist (measured at the navel) is the cheapest proxy for the metabolically risky visceral fat; body fat percentage is the most informative but the home methods (bioimpedance scales) are noisy — trust their trend over months, never a single reading. BMI is fine as a population screen but misclassifies muscular individuals. Track two simple things consistently rather than four things badly.
How long does body recomposition take?
Realistically 3-6 months to see it clearly as a beginner (clothes fitting differently, visible definition changes), with the scale possibly not moving at all the entire time. Recomposition is slow because you're building and dismantling simultaneously — dedicated bulking or cutting cycles change faster but trade for it. Beginners and returning lifters recompose fastest; lean, advanced trainees do it slowest and usually need cyclical approaches.