Which one of the following choices best represents a sign of poor posture?
a. too much inward curve in upper back
b. knees that extend backward too much
c. too much outward curve in lower back
d. abdomen appears sunken

The real advantage to hydrostatic weighing is that it a. can be done anywhere with no equipment b. gives one of the most accurate measurements of body fat c. uses calipers to measure body fat select the best answer from the choices provided.