What the ratios mean
Waist-to-hip ratio (WHR) shows whether you store more fat around your middle. Abdominal (visceral) fat is linked to a higher risk of heart disease and type 2 diabetes. The World Health Organization treats a WHR above 0.90 for men and 0.85 for women as a sign of substantially increased risk.
Waist-to-height ratio (WHtR) is even simpler: keep your waist under half your height. The UK's NICE guidance (2022) uses 0.5–0.59 as increased risk and 0.6 or above as high risk.
About the posture check
These are quick screening signs, not a diagnosis. Small postural habits are common and often improve with a few minutes of targeted exercise a day. If you have pain, numbness or a sudden change, see a physiotherapist or doctor.