Radiographic heart volume, stroke volume and exercise cardiac frequency: relationship to body composition and other factors in healthy adult males.
Amongst 288 healthy male workers in heavy industry the radiographic heart volume was related to the fat-free mass and the percentage body fat which between them explained 27% of the variance. Exercise was performed on a treadmill using a belt speed of 80 m.min-1 (3 mph) and an incline which was increased progressively to 14% when the oxygen uptake was on average 61% of the maximum for these subjects. The exercise cardiac output was related to the uptake of oxygen, the fat-free mass and the ambient temperature; these factors accounted for 52% of the variance. The exercise stroke volume was related to the heart volume, the fat-free mass, the thigh muscle width, the ambient temperature, the Harvard Pack Index and other measurements which between them accounted for 42% of the variance. The exercise cardiac frequency was correlated negatively with the heart volume, the fat-free mass, the age and the Harvard Pack Index. The variates between them described 41% of the variance. The findings provide reference values for heart volume, stroke and exercise cardiac frequency in similar subjects.
D000328:Adult; D001823:Body Composition; D002302:Cardiac Output; D002306:Cardiac Volume; D003032:Coal Mining; D006339:Heart Rate; D006801:Humans; D008297:Male; D005082:Physical Exertion; D012016:Reference Values; D013318:Stroke Volume; D014852:Wales