Jarning Jon M, Mok Kam-Ming, Hansen Bjørge H, Bahr Roald
a Faculty of Medicine and Dentistry , University of Bergen , Bergen , Norway.
Sports Biomech. 2015 Mar;14(1):95-105. doi: 10.1080/14763141.2015.1027950. Epub 2015 Apr 23.
Patellar tendinopathy is prevalent among athletes, and most likely associated with a high jumping load. If methods for estimating jump frequency were available, this could potentially assist in understanding and preventing this condition. The objective of this study was to explore the possibility of using peak vertical acceleration (PVA) or peak resultant acceleration (PRA) measured by an accelerometer to estimate jump frequency. Twelve male elite volleyball players (22.5 ± 1.6 yrs) performed a training protocol consisting of seven typical motion patterns, including jumping and non-jumping movements. Accelerometer data from the trial were obtained using a tri-axial accelerometer. In addition, we collected video data from the trial. Jump-float serving and spike jumping could not be distinguished from non-jumping movements using differences in PVA or PRA. Furthermore, there were substantial inter-participant differences in both the PVA and the PRA within and across movement types (p < 0.05). These findings suggest that neither PVA nor PRA measured by a tri-axial accelerometer is an applicable method for estimating jump frequency in volleyball. A method for acquiring real-time estimates of jump frequency remains to be verified. However, there are several alternative approaches, and further investigations are needed.
髌腱病在运动员中很常见，很可能与高跳跃负荷有关。如果有估计跳跃频率的方法，这可能有助于了解和预防这种情况。本研究的目的是探讨使用加速度计测量的峰值垂直加速度（PVA）或峰值合成加速度（PRA）来估计跳跃频率的可能性。12名男性精英排球运动员（22.5±1.6岁）进行了一项训练方案，包括七种典型运动模式，包括跳跃和非跳跃动作。试验中的加速度计数据使用三轴加速度计获得。此外，我们还收集了试验的视频数据。使用PVA或PRA的差异无法将跳飘发球和扣球跳跃与非跳跃动作区分开来。此外，在运动类型内部和之间，PVA和PRA在参与者之间都存在显著差异（p<0.05）。这些发现表明，三轴加速度计测量的PVA和PRA都不是估计排球跳跃频率的适用方法。一种获取跳跃频率实时估计值的方法仍有待验证。然而，有几种替代方法，需要进一步研究。
