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

Atalet ölçüm birimlerinin (IMU) antrenörler tarafından kullanımı özellikle veri işleme sürecinin karmaşıklığı nedeniyle istenilen düzeye ulaşamamıştır. Çalışmanın amacı IMU’lardan elde edilen ham ivmelenme verilerinin basit filtreleme yöntemleri ile işlenmesinin ardından alanda faaliyet gösteren bireyler tarafından yüzmede teknik analizlerde kullanılabileceğinin ortaya koyulmasıdır. Bu amaç doğrultusunda IMU’lardan elde edilen ivmelenme verilerinden yüzücülerin kol çekişi ve ayak vuruşu süreleri belirlenmiş ve video kayıtlarından elde edilen süreler ile uyumu incelenmiştir. Çalışmada 5 kadın (18.2±.84 yıl; 1.69±.04 m; 60.76±1.86 kg) ve 5 erkek (19.6±2.41 yıl; 1.81±.03 m; 81.2±2.69 kg) müsabık yüzücü katılmcı olarak yer almıştır. İvemelenme ve görüntü verileri, yüzücülerin ayak ve el bileklerine bilateral olarak yerleştirilen dört adet IMU ve iki adet yüksek hızlı kamera ile toplanmıştır. Uyumun incelenmesinde Bland-Altman yöntemi kullanılmıştır. İki ölçüm arasındaki farkın “0” dan önemli ölçüde farklı olup olmadığını test etmek için ise Tek Örneklem T-testi kullanılmıştır. Kol çekişi ve ayak vuruşu döngüsü sürelerindeki farklılıkların çoğu (4’ü hariç) uyum sınırları içinde yer almıştır. T-testleri iki farklı ölçüm yönteminden elde edilen veriler arasındaki tüm farklılıkların 0'dan farklı olmadığını göstermiştir (p>.05). Sonuçlar, ivmeölçer verilerinin tek başına, diğer verilerle birleştirilmeden veya karmaşık algoritmalarla işlenmeden yüzme tekniklerinin zamansal değişkenlerini incelemek için kolaylıkla kullanılabileceğini göstermiştir.

Anahtar Kelimeler:

Yüzme, Atalet ölçüm birimi, Giyilebilir teknoloji, Kol çekişi, Ayak vuruşu

A Simplified Method for Determining Swimming Arm-Stroke and Kick Durations Using Wearable Inertial Measurement Units

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.

Keywords:

Swimming, Inertial measurement unit, Wearable technology, Arm-stroke, Kicking,

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