Elsey Amanda M, Lowe Alister K, Cornell Ashley N, Whitehead Paul N, Conners Ryan T
Department of Kinesiology, The University of Alabama in Huntsville, Huntsville, AL, USA.
Int J Exerc Sci. 2021 Apr 1;14(4):230-238. doi: 10.70252/MBCK9241. eCollection 2021.
One method to measure body composition that is gaining popularity is the BodyMetrix™, which uses A-mode ultrasound. A-mode ultrasound, when used with the BodyMetrix™, has been found to be a reliable and a cost-effective tool for measuring overall body fat percentage. Furthermore, the portability and short duration testing features of the BodyMetrix™, allows for testing of a large group of athletes inside or outside of a clinical setting. Despite these advantages, research regarding the BodyMetrix™ is limited and has primarily focused on the seven-site testing technique. However, the three-site technique allows for faster testing and a reduction of time needed to test an entire team or multiple sports teams. Thus, the purpose of this study was to compare the three-site and seven-site methods using the BodyMetrix™ to determine body fat percentage in female collegiate athletes. It was hypothesized that body fat percentage determined via the seven-site method would be different from those obtained by three-site measurement technique. Study participants included 40 National Collegiate Athletic Association (NCAA) Division-II female athletes from volleyball, soccer, and softball teams. The Jackson Pollock three-site (thigh, suprailiac, triceps) and seven-site (thigh, suprailiac, triceps, abdominal, subscapular, chest, and axilla) equations were used to determine body fat percentage values. The time required to perform the three-site and seven-site measurements were also recorded. A paired samples -test was used to assess if there was a difference between the three-site and the seven-site body fat percentage measurements with the use of the BodyMetrix™ . The three-site method (23.21 ± 3.61) was significantly lower ( < 0.001) compared to the seven- site method (25.75 ± 4.39). On average, the three-site technique took 2 minutes and 13 seconds less than the seven-site technique.
一种越来越受欢迎的测量身体成分的方法是使用A模式超声的BodyMetrix™。人们发现，当与BodyMetrix™一起使用时，A模式超声是一种可靠且经济高效的测量全身脂肪百分比的工具。此外，BodyMetrix™的便携性和短时间测试特点，使得可以在临床环境内外对一大群运动员进行测试。尽管有这些优点，但关于BodyMetrix™的研究有限，主要集中在七点测试技术上。然而，三点技术可以更快地进行测试，并减少测试整个团队或多个运动队所需的时间。因此，本研究的目的是比较使用BodyMetrix™的三点法和七点法来确定女大学生运动员的体脂百分比。研究假设是，通过七点法确定的体脂百分比将与通过三点测量技术获得的体脂百分比不同。研究参与者包括来自排球、足球和垒球队的40名美国国家大学体育协会（NCAA）二级女运动员。使用杰克逊·波洛克三点（大腿、髂嵴上、肱三头肌）和七点（大腿、髂嵴上、肱三头肌、腹部、肩胛下、胸部和腋窝）公式来确定体脂百分比值。还记录了进行三点和七点测量所需的时间。使用配对样本t检验来评估使用BodyMetrix™时三点和七点体脂百分比测量之间是否存在差异。与七点法（25.75±4.39）相比，三点法（23.21±3.61）显著更低（<0.001）。平均而言，三点技术比七点技术少用2分13秒。
