McPherson April L, Berry John D, Bates Nathanial A, Hewett Timothy E
Mayo Graduate School, Mayo Clinic, Rochester, MN, USA.
Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA.
Int J Sports Phys Ther. 2017 Aug;12(4):527-634.
Previous investigations of single-camera 3D motion analysis camera systems validity have yielded mixed results for clinical applications.
The purpose of the current study was to determine the validity of a single-camera 3D motion analysis system for subject standing height, vertical jump height, and broad jump length. It was hypothesized that single-camera system values would demonstrate high correlation to the values obtained from accepted standard clinical measurements.
Experimental validation study.
Twelve subjects (age 20.6 ± 4.9 years) from a cohort that included high school to adult athletes who participate in sports at a recreational or competitive level entered and completed the study. Performance measurements for standing height, vertical jump height, and broad jump length were measured with standard clinical measurements and a single-camera 3D motion system.
Single-camera system measurements were significantly different than clinical measures for standing height ( < 0.01) and vertical jump height ( < 0.01). There was no statistically significant difference between single-camera system measures and clinical measures for broad jump distance ( > 0.07). The relative performance of subjects was highly correlated between single-camera and clinical measurements (r > 0.80).
Single-camera measurements lacked precision along the vertical axis of motion, but correlated well with clinically accepted measurements for standing height, broad jump length, and vertical jump height. The single-camera system may be capable of making accurate performance assessments in the horizontal plane, but should be limited to relative assessments along the vertical axis of motion. Additional refinement to increase the data reporting accuracy of the motion system along the vertical axis should be considered before relying on this single-camera 3D motion analysis system over clinical techniques to measure vertical jump and standing broad jump performances.
2b.
先前对单相机三维运动分析系统有效性的研究在临床应用中得出了喜忧参半的结果。
本研究旨在确定单相机三维运动分析系统在测量受试者站立身高、垂直跳高度和跳远长度方面的有效性。研究假设单相机系统测量值与公认的标准临床测量值具有高度相关性。
实验性验证研究。
从一组包括高中到成年运动员的队列中选取12名受试者（年龄20.6±4.9岁），这些运动员以休闲或竞技水平参加体育运动，他们参与并完成了本研究。使用标准临床测量方法和单相机三维运动系统测量站立身高、垂直跳高度和跳远长度。
单相机系统测量的站立身高（<0.01）和垂直跳高度（<0.01）与临床测量值有显著差异。单相机系统测量的跳远距离与临床测量值之间无统计学显著差异（>0.07）。单相机测量和临床测量中受试者的相对表现高度相关（r>0.80）。
单相机测量在运动垂直轴上缺乏精度，但与站立身高、跳远长度和垂直跳高度的临床公认测量值相关性良好。单相机系统可能能够在水平面进行准确的性能评估，但应仅限于沿运动垂直轴的相对评估。在依靠此单相机三维运动分析系统而非临床技术来测量垂直跳和立定跳远表现之前，应考虑进一步改进以提高运动系统沿垂直轴的数据报告准确性。
2b。
