Department of Orthopaedic Surgery, University of Arkansas for Medical Science, Little Rock, AR, USA.
Department of Orthopaedic Surgery, University of Arkansas for Medical Science, Little Rock, AR, USA; Department of Neuroscience, Norwegian University of Science and Technology, Trondheim, Norway.
Hum Mov Sci. 2021 Jun;77:102797. doi: 10.1016/j.humov.2021.102797. Epub 2021 Apr 10.
Preferred and fast speed sit-to-stand and stand-to-sit (STS) tests are prevalent in literature, but biomechanical changes between the different speeds of STS have never been studied. Understanding differences between these STS techniques will better inform experimental design for research assessing functional ability in clinical populations. The purpose of this study was to investigate the effect of different speeds of STS transfers on lower body and trunk kinematics and kinetics in healthy adults. Nineteen healthy middle-aged and older adults participated in this study. Two different speeds of STS were tested: self-selected speed and fast speed (as quickly as possible). Ten Vicon cameras and two AMTI force platforms were used to collect three-dimensional kinematic and kinetic data. During sit-to-stand transfer, peak knee extension velocity and knee extension moment were significantly increased for the fast speed STS as compared to the preferred speed STS. During stand-to-sit transfer, peak knee extension moment and lower back moment were significantly increased while STS time was decreased for the fast speed STS as compared to the preferred speed STS. Our results indicate that the fast speed STS could be more challenging for participants compared to the preferred speed STS evidenced by greater knee and lower back joint movements. Therefore, fast STS tests should be reconsidered when testing middle-aged and older adults with chronic low back pain and knee joint problems.
首选和快速的坐站和站坐（STS）测试在文献中很常见，但不同 STS 速度之间的生物力学变化从未被研究过。了解这些 STS 技术之间的差异将更好地为评估临床人群功能能力的研究设计提供信息。本研究的目的是研究不同 STS 转移速度对健康成年人下肢和躯干运动学和动力学的影响。19 名健康的中老年人参与了这项研究。测试了两种不同的 STS 速度：自选速度和快速速度（尽可能快）。使用十个 Vicon 摄像机和两个 AMTI 力台收集三维运动学和动力学数据。在从坐到站的转移过程中，与首选速度 STS 相比，快速 STS 的膝关节伸展速度和膝关节伸展力矩的峰值明显增加。在从站到站的转移过程中，与首选速度 STS 相比，快速 STS 的膝关节伸展力矩和下背部力矩的峰值明显增加，而 STS 时间减少。我们的结果表明，与首选速度 STS 相比，快速 STS 对参与者来说可能更具挑战性，这表现在膝关节和下背部关节运动更大。因此，在测试患有慢性下腰痛和膝关节问题的中老年人时，应重新考虑快速 STS 测试。
