body
Waist-to-Hip Ratio
See how Waist-to-Hip Ratio is categorized and expressed as a measurement.
- How it's examined
- physical
- Value type
- numeric
- Unit
- ratio
- Better when
- lower is better
- Plausible min
- 0.6
- Plausible max
- 1.3
- Healthy max
- 0.9
- How often
- monthly
Moved by
Interventions that trials measured against this marker, and which way it moved.No trial has measured Waist-to-Hip Ratio against an intervention in this library yet.
Via effects
Interventions targeting an effect this marker tracks. Trials did not measure the marker itself.Body Composition Improvement
Weight Management Support
Full write-up
What is it
Waist-to-Hip Ratio is a body measurement that expresses the relationship between waist and hip measurements as a single ratio. It describes body proportions, with its meaning read alongside the categories provided for the measurement.
How to measure it
Measure Waist-to-Hip Ratio once a month and record the result as a ratio of waist measurement to hip measurement. Use the same measurement approach each time so that readings can be compared from month to month.
Interpret the result by looking at its direction over time: lower values are considered better for this measurement. A single reading is less useful than a consistent series of monthly readings taken under the same approach.
What good looks like
For Waist-to-Hip Ratio, a favorable result is one that sits toward the lower end of the displayed plausible span. The healthy boundary provides orientation rather than a verdict: targets are personal, and one reading alone does not define whether the result is good or bad.
The most useful view is the pattern across monthly readings. A consistent direction over several measurements is more informative than an isolated change, which may reflect how or when the measurement was taken rather than a meaningful shift.
For comparisons to be useful, measure under similar conditions each time. Changes in the device, time of day, or measurement technique can make two readings less comparable, even when the underlying situation has not changed. Keep the method as consistent as possible and interpret the overall trend rather than reacting to a single value.
What moves it
For Waist-to-Hip Ratio, decreases are the favorable direction. The most relevant evidence comes from studies that measured this exact ratio. Tai Chi, Omega-3, Berberine, Chlorella, and Yoga were associated with decreases, while Apple Cider Vinegar, Spirulina, Psyllium Husk, Quercetin, Resveratrol, Curcumin, Reishi, Alpha-Lipoic Acid (ALA), and Whey Protein were unchanged. Inositol was associated with an increase; its reported comparison found metformin more efficacious than myo-inositol, without an exact pooled estimate.
The direct studies generally reassessed the ratio between 8.0 and 48.0 weeks, so changes may not be captured by very early measurement. The direction of a result also does not by itself establish how consistently it will occur across people or settings.
A separate, less direct group targets related outcomes rather than this marker itself. These target what Waist-to-Hip Ratio tracks, though trials did not measure it directly. For Body Composition Improvement, Cycling, Swimming, Yoga, Tai Chi, L-Carnitine, and Hatha Yoga were associated with improvement. For Weight Management Support, Yoga, Swimming, Curcumin, Spirulina, Whey Protein, and Black Seed Oil were associated with improvement. These findings concern body composition, weight, body mass index, waist circumference, or related outcomes, so they should not be treated as direct evidence that Waist-to-Hip Ratio will change. The related studies included people with clinical conditions as well as populations whose health status was not specified.