Body size and chronic acceleration.
Body composition studied as a function of acceleration (1-4.7 G) in mice and rats showed fat-free body mass (FFBM) to be a predictable function of G-force while corroborating the known lability of body fat. Of nine studied components of FFBM only skeletal muscle, liver and heart contributed to the observed changes induced by delta G. (Body water /FFBM) was independent of delta G. When FFBM (as a percentage of 1 G controls) was plotted against G for mice, rats and monkeys (1-4.7 G) and men (0-1 G), the mass of the fat-free compartment passed through a maximum at 1 G. The data distribution in the figure suggested possible effects of body size and of age.
Pitts
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Department of Physiology, School of Medicine, University of Virginia, Charlottesville, Va. USA.
D000054:Acceleration; D000273:Adipose Tissue / Q000378:metabolism; D000375:Aging / Q000502:physiology; D000818:Animals; D001823:Body Composition; D001824:Body Constitution; D005260:Female; D006801:Humans; D018471:Hypergravity; D008099:Liver / Q000378:metabolism; D008254:Macaca nemestrina; D008297:Male; D051379:Mice; D018482:Muscle, Skeletal / Q000378:metabolism; D009206:Myocardium / Q000378:metabolism; D051381:Rats