also: からだねんれい
noun
body age; biological age of the body
Medical/health term referring to an estimate of how old a person's body seems based on fitness, metabolism, or other physiological metrics, as opposed to chronological age.
健康診断で体年齢が実年齢より若いと言われた。
At my health checkup, I was told my body age is younger than my actual age.
この体重計は体年齢も測定できます。
This scale can also measure your body age.
実年齢 is chronological age, while 体年齢 is the estimated biological age of the body based on health metrics.
Compound of 体 (body) and 年齢 (age). A modern term used in health and fitness contexts.