Anthropometric-Arm Radiogrammetric Assessment of Body Composition, Muscularity and Frame Size.
Abstract
The purpose of the present experiment was to determine the validity of arm radiography for quantifying total body fat in young and older men and women. One hundred subjects were measured for body density by underwater weighing with correction for residual air volume to estimate percent body fat, and horizontal right upper arm x-ray at KV 76, exposure time 1/30th s, 300 MA, and focal length 72 in. Total radiation was 10 mR. Fat width on the x-ray was measured at three cross-sectional sites (FAT, x-ray). Errors of measurement and reliability were assessed from duplicate x-rays and repeated measures on the same x-rays (r=0.92-0.99). The equation to convert FAT, x-ray to individual estimates of percent fat is FAT, x-ray/3F x k constant, where 3F = 3 square root of wt, kg/ht, dm, and k is a previously determined mean value for % body fat. The new, arm radiogrammetric method is a reliable and valid technique for quantification of relative body fat and thickness of muscle and bone for cross-sectional and longitudinal analyses in men and women ages 18-40 yr.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1982
- Accession Number
- ADA176658
Entities
People
- Albert R. Behnke
- Frank I. Katch
Organizations
- University of Massachusetts Amherst