Keil Mhairi, Totosy de Zepetnek Julia O, Brooke-Wavell Katherine, Goosey-Tolfrey Victoria L
a English Institute of Sport , Birmingham , UK.
b The Peter Harrison Centre for Disability Sport, School of Sport, Exercise and Health Sciences , Loughborough University , Loughborough , UK.
Eur J Sport Sci. 2016;16(1):65-71. doi: 10.1080/17461391.2014.966763. Epub 2014 Oct 13.
The purpose of this study was to assess the reproducibility of body composition measurements by dual-energy X-ray absorptiometry (DXA) in 12 elite male wheelchair basketball players (age 31 ± 7 years, BMI 21 ± 2 kg/m(2) and onset of disability 25 ± 9 years). Two whole body scans were performed on each participant in the supine position on the same day, using Lunar Prodigy Advance DXA (GE Lunar, Madison, WI, USA). Participants dismounted from the scanning table and were repositioned in-between the first and second scan. Whole body coefficient of variation (CV) values for bone mineral content (BMC), fat mass (FM) and soft tissue lean mass (LTM) were all <2.0%. With the exclusion of arm FM (CV = 7.8%), CV values ranged from 0.1 to 3.7% for all total body and segmental measurements of BMC, FM and LTM. The least significant change that can be attributed to the effect of treatment intervention in an individual is 1.0 kg, 1.1 kg, 0.12 kg for FM, LTM, and BMC, respectively. This information can be used to determine meaningful changes in body composition when assessed using the same methods longitudinally. Whilst there may be challenges in the correct positioning of an individual with disability that can introduce greater measurement error, DXA is a highly reproducible technique in the estimation of total and regional body composition of elite wheelchair basketball athletes.
本研究旨在评估双能X线吸收法（DXA）测量12名精英男性轮椅篮球运动员身体成分的可重复性（年龄31±7岁，体重指数21±2kg/m²，残疾起始时间25±9年）。同一天，使用Lunar Prodigy Advance DXA（美国威斯康星州麦迪逊市通用电气公司Lunar）对每位参与者在仰卧位进行两次全身扫描。参与者从扫描台上下来，在第一次和第二次扫描之间重新定位。骨矿物质含量（BMC）、脂肪量（FM）和软组织瘦体重（LTM）的全身变异系数（CV）值均<2.0%。排除手臂FM（CV = 7.8%）后，BMC、FM和LTM的所有全身和分段测量的CV值范围为0.1%至3.7%。个体中可归因于治疗干预效果的最小显著变化分别为FM 1.0kg、LTM 1.1kg、BMC 0.12kg。当纵向使用相同方法评估时，该信息可用于确定身体成分的有意义变化。虽然残疾个体的正确定位可能存在挑战，可能会引入更大的测量误差，但DXA是一种在估计精英轮椅篮球运动员全身和局部身体成分方面具有高度可重复性的技术。
