HIZ TEMELLİ ANTRENMANLARDA KULLANIM AMACIYLA GELİŞTİRİLEN BİR LİNEER TRANSDÜSERİN GÜVENİRLİĞİ VE GEÇERLİĞİ

Year 2024, Volume: 22 Issue: 2, 47 - 58, 30.07.2024

İzzet İnce

https://doi.org/10.33689/spormetre.1375297

Abstract

Hız temelli kuvvet antrenmanları, son yıllarda büyük ilgi gören bir yaklaşım olarak dikkat çekmektedir. Bu yöntemin uygulanmasında en sık tercih edilen cihazlar lineer transdüserlerdir. Bu araştırmada, donanımı ve yazılımı yazar tarafından geliştirilen bir lineer transdüserin güvenirlik ve geçerliğinin değerlendirilmesi amaçlanmıştır. Optik kodlayıcı, bluetooth ve Wi-Fi modülü ile donatılmış bir mikrodenetleyiciden oluşan bu lineer transdüser, kriter cihaz Tendo Power Analyzer ile karşılaştırılmıştır. Araştırmaya 13 halterci gönüllü olarak katılmıştır. Silkme çekişi esnasında farklı yüklerle (%40, %60, %90 ve %110 1TM) gerçekleştirilen eş zamanlı maksimum hız ölçümleri alınarak geçerlik değerlendirilmiş; bir hafta arayla, aynı saatte ve aynı test prosedürleri uygulanarak test-tekrar test güvenirliği incelenmiştir. Güvenirlik analizi için sınıf içi korelasyon katsayısı (ICC), varyasyon katsayısı (CV), ölçümlerin standart hatası (SEM) ve minimum tespit edilebilir değişim (MDC) hesaplanmıştır. Geçerlik, eşli örneklemler t-testi, regresyon analizi ve Bland-Altman analizi kullanılarak değerlendirilmiştir. ICC değerleri 0.85 ile 0.96 arasında değişmiş, CV değerleri %1.62 ile %4.12 arasında bulunmuştur. SEM değerleri 0.045 m·s⁻¹ ile 0.084 m·s⁻¹ arasında hesaplanmış, MDC değerleri ise 0.137 m·s⁻¹ ile 0.236 m·s⁻¹ arasında değişmiştir. Bland-Altman grafiklerine göre, farklar rastgele bir dağılım göstermiş ve sistematik (sabit veya oransal) bir sapma gözlenmemiştir. Regresyon analizleri sonucunda da sabit veya oransal sapma tespit edilmemiştir. Analiz sonuçları, geliştirilen cihazın silkme çekişi esnasında farklı yüklerle gerçekleştirilen maksimal hız ölçümlerinde güvenilir ve geçerli olduğunu ortaya koymaktadır.

Keywords

kuvvet antrenmanı, nöromüsküler performans, kuvvet ve kondisyon, halter

VALIDITY AND RELIABILITY OF A LINEAR TRANSDUCER DEVELOPED FOR USE IN VELOCITY-BASED TRAINING

Abstract

Velocity-based strength training (VBT) has gained significant attention in recent years. The most preferred devices for implementing this method are linear position transducers (LPT). This study aimed to evaluate the reliability and validity of an LPT developed by the author, which includes both hardware and software components. The LPT, consisting of an optical encoder, Bluetooth, and Wi-Fi modules integrated into a microcontroller, was compared against the criterion device, the Tendo Power Analyzer. Thirteen weightlifters volunteered to participate in the study. Validity was assessed through simultaneous measurements of peak velocity during the clean pull exercise at various loads (40%, 60%, 90%, and 110% of 1RM), while test-retest reliability was evaluated by repeating the same test protocols at the same time of day, one week apart. Reliability analysis included calculating the intraclass correlation coefficient (ICC), coefficient of variation (CV), standard error of measurement (SEM), and minimum detectable change (MDC). Validity was assessed using paired samples t-test, regression analysis, and Bland-Altman analysis. The ICC values ranged from 0.85 to 0.96, and the CV values ranged from 1.62% to 4.12%. The SEM values were calculated to be between 0.045 m·s⁻¹ and 0.084 m·s⁻¹, while the MDC values ranged from 0.137 m·s⁻¹ to 0.236 m·s⁻¹. The differences were randomly distributed, with no systematic (fixed or proportional) bias observed in Bland-Altman plots. Similarly, regression analyses revealed no fixed or proportional bias. The results of the analyses demonstrate that the developed LPT is reliable and valid for measuring peak velocity during clean pull exercises across different loads.

Keywords

Weightlifting, strength training, neuromuscular performance, strength and conditioning

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