Body measurements for progress: what to track and how
A tape measure is the cheapest, most repeatable body composition tool you can buy. You only need a few measurements, taken the same way each time.
Short answer
Track waist and bodyweight at minimum. Add chest, arms, thighs and hips (or shoulders for muscle gain). Measure in the morning, relaxed, on bare skin, at the same landmarks, every one to four weeks.
Which measurements, for which goal
| Goal | Must have | Nice to have |
|---|---|---|
| Weight loss | Waist, bodyweight | Hips, thighs, chest |
| Muscle gain | Arms, chest, shoulders, bodyweight | Thighs, waist (to watch fat gain) |
| Recomposition | Waist, arms, bodyweight | Chest, thighs, shoulders |
| Health | Waist, height (for ratio) | Hips (waist-to-hip ratio) |
Where to measure
- Waist: at the navel, or halfway between your lowest rib and the top of your hip bone. Pick one and stick to it. See how to measure your waist.
- Hips: widest part of the buttocks, feet together.
- Chest: fullest part, under the armpits, after breathing out.
- Arms: fullest part of the upper arm, same arm, relaxed (or flexed, consistently).
- Thighs: fullest part, or a fixed distance above the kneecap.
- Shoulders: around the widest point of the delts, arms relaxed.
Rules for repeatable numbers
- Same time (morning), same tape, bare skin.
- Tape snug, not pressing in, parallel to the floor.
- Measure twice, record the average.
- Every 1–4 weeks is plenty; changes of a few millimetres are within measurement error.
ProgressLens tracks bodyweight, waist, chest, shoulders, arms and thighs with trend charts. Prefer paper? Print the free measurement chart.
FAQ
Frequently asked questions
How often should I take body measurements?
Every one to four weeks. Weekly is fine for waist; monthly is enough for arms and thighs.
Which measurement is most important for fat loss?
Waist. It tracks belly fat closely and is used in health ratios like waist-to-height.