Weight is most likely to be an unreliable indicator of fatness for the following individuals:
- A professional bodybuilder: Their weight may be higher due to increased muscle mass.
- A patient with wasting disease: They may have a low weight despite low body fat due to muscle and tissue loss.
Weight is generally more reliable for assessing fatness in most other individuals, including post-menopausal women, older adult men, and women due to menstruate within a few days.