ABSTRACT

Body composition (BC) is a valuable indicator of health and performance. Air-displacement plethysmography (ADP) is a popular, efficient, and reliable method for assessing BC. A-mode ultrasonography (AUS) is another method, and its affordability, mobility, and practicality make it a plausible device for industry and health professionals. This study assessed the cross-sectional and change relationships and agreements between AUS and ADP from a 12-week resistance exercise intervention designed to increase fat-free mass (FFM). BC was measured by both modalities pre/post-intervention. Twenty-nine normal weight males (age: 20.6 ± 2.2 years) participated. Both modalities tracked changes in FFM and % body fat (%BF) (∆ADP = 1.7 ± 1.5 kg, −0.4 ± 2.5%; ∆AUS = 2.4 ± 1.9 kg, −1.4 ± 2.1%; main effects for time p < .005, respectively), with no differences between modalities (interactions p > .05), and were moderately significantly correlated (r = 0.58 and r = 0.60, p < .01). Bland-Altman plots revealed no proportional biases. These devices tracked changes in FFM and %BF similarly over time. Future research should assess AUS at different levels of adiposity.

摘要

身体成分（BC）是健康和表现的重要指标。空气体积体积描记法（ADP）是一种评估BC的流行，有效且可靠的方法。A型超声检查（AUS）是另一种方法，其价格适中，移动性和实用性使其成为工业和卫生专业人员的合理设备。这项研究通过为期12周的旨在增加无脂肪体重（FFM）的抵抗运动干预措施，评估了AUS与ADP的横断面，变化关系和协议。BC通过干预前后的两种方式进行测量。29名体重正常的男性（年龄：20.6±2.2岁）参加了比赛。两种方式都跟踪了FFM和人体脂肪百分比（％BF）的变化（ΔADP= 1.7±1.5 kg，-0.4±2.5％;ΔAUS= 2.4±1.9 kg，-1.4±2.1％;时间p的主要影响分别<.005），模态之间没有差异（交互作用p > .05），并且呈中等显着相关（r = 0.58和r = 0.60，p <.01）。Bland-Altman图显示没有比例偏差。这些设备类似地跟踪了FFM和％BF随时间的变化。未来的研究应评估不同肥胖水平的AUS。