應用慣性感測器及無線足壓鞋墊對羽球步伐之探討

Abstract

前言：過去量化羽球步伐下肢動力學參數，普遍是在實驗室的情境下利用測力板進行實驗，但最近穿戴裝置蓬勃發展具價格便宜、體積小、減少身體的干擾等優勢，逐漸廣泛應用於運動量測。目前許多研究利用慣性感測器及無線足壓系統來測量運動的負荷、動作的辨識及下肢動力學等應用。目的：應用慣性感測器及無線足壓鞋墊，了解不同羽球步伐動作的下肢動力學參數、加速度參數及動作差異，作為未來發展智慧羽球鞋參考依據。方法：招募15名大專男子羽球選手進行實驗，進行羽球步伐訓練動作，同時量測雙腳的垂直地面作用力(Vertical ground reaction force, VGRF)、壓力中心(Center of pressure, COP)軌跡及加速度峰值等指標。結果：在11個羽球步伐訓練的慣用腳及非慣用腳呈現顯著性差異，證明羽球運動的雙腳是非對稱性；IMU的加速度峰值可以分辨不同的羽球動作在垂直、左右及前後方向的貢獻度皆有不同，IMU可以用來量化羽球步伐特徵；COP軌跡能辨識步伐間的差異，可以做為羽球步伐動作之參考。結論：VGRF、COP軌跡及加速度峰值可以用來評估羽球專項動作特徵，無線足壓系統的VGRF與COP軌跡資料，可以應用於羽球專項訓練，做為了解下肢動力學的參數依據。Experiments to quantify the kinetic parameters of the lower limb of a badminton footwork were generally carried out in a laboratory setting using force plates. Recently, wearable devices have been developed to be cheaper, smaller and less physically intrusive, and increasingly used for sports measurement. Many current studies use inertial measurement unit (IMU) and wireless plantar pressure insoles for applications such as load measurement, movement recognition and lower limb kinetic parameters. Object: To quantify the lower limb kinetic parameters, acceleration parameters and movement differences in footwork movements using IMU and wireless foot pressure insoles, which will serve as references for the future development of smart badminton shoes. Methods: Fifteen college badminton players were recruited, the vertical ground reaction force (VGRF), center of pressure (COP) trajectory and peak acceleration of the feet were measured. Results: Significant differences were found between the racket-side and non-racket-side feet in footwork training. The acceleration peaks can distinguish between the vertical, medial-lateral, and anterior-posterior contributions of different footwork movements, and the IMU can be used to quantify footwork characteristics. The COP trajectory identifies the difference of footwork and can be used as references for the footwork movement. Conclusion: The VGRF, COP trajectory and acceleration peaks can be used to assess footwork movement characteristics in badminton. The VGRF and COP trajectory data from the wireless plantar pressure system can be applied to badminton footwork training as a parameter for understanding lower limb kinetic parameters.