Yüzmede Kol Çekişi ve Ayak Vuruşu Sürelerini Belirlemede Giyilebilir Atalet Ölçüm Birimlerini Kullanarak Basitleştirilmiş Bir Yöntem

Abstract

The use of inertial measurement units (IMU) by the coaches has not reached the desired level, especially due to the complexity of the data processing. The aim of the study is to demonstrate that raw acceleration data obtained from IMUs can be used in swimming technical analysis by individuals operating in the field after processing with simple filtering methods. For this aim, the arm-stroke and kicking durations of the swimmers were determined using the acceleration data obtained from the IMUs and the agreement with the times obtained from the video recordings was examined. Five female (18.2±.84 years; 1.69±.04 m; 60.76±1.86kg) and 5 male (19.6±2.41 years; 1.81±.03 m; 81.2±2.69 kg) competitive swimmers participated to the study. Data was collected via two high-speed cameras and four IMUs which were placed bilaterally to the ankles and wrists of the swimmers. Bland-Altman method were used to examine the agreement. One-Sample T-tests were used to test whether the difference between the two measurements differed significantly from the “0”. The majority (except 4) of the differences in arm-stroke and kicking cycle durations were within the limits of agreement. T-tests indicated that all the differences between the data obtained from two different measurement methods were not different from 0 (p>.05). Results showed that the accelerometer data alone, without fusion with other data or processed with complex algorithms can be used with ease for investigating temporal variables of swimming techniques.