Journals / SPORMETRE Beden Eğitimi ve Spor Bilimleri Dergisi / 2009 / Cilt: 7 - Sayı: 2

EFFECTS OF ELEVATED HEELS ON EMG ACTIVITIES OF VASTUS LATERALIS AND GASTROCNEMIUS MUSCLES IN ISOMETRIC STRENGTH MEASUREMENT

İZOMETRİK KUVVET ÖLÇÜMÜNDE TOPUK YÜKSELTMENİN VASTUS LATERALİS VE GASTROCNEMIUS KASLARININ EMG AKTİVİTESİNE ETKİSİ

Pages
41–46
Publication Date
2009-06-01
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Besides, the results showed that there were significant correlations between two positions that isometric leg strength (0.78) and EMG activities of VL and GAST musles (0.86) (0.71) respectively (p<0.05).

📌 3 Key Takeaways

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Objective & Hypothesis:The purpose of this study was to investigate effects of elevated heels on EMG activities of vastus lateralis (VL) and gastrocnemius (GAST) muscles in isometric strength measurement.
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Key Findings & Data:Ten physically active men subject (Age: 23.6±2 years, height: 177±4 cm, weight: 72.3±4 kg) were voluntarily participated in this study.
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Conclusion & Impact:Besides, the results showed that there were significant correlations between two positions that isometric leg strength (0.78) and EMG activities of VL and GAST musles (0.86) (0.71) respectively (p<0.05).
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:İzometrik kuvveti ölçümü · Elektromyografi · Gastrocnemius

Abstract

The purpose of this study was to investigate effects of elevated heels on EMG activities of vastus lateralis (VL) and gastrocnemius (GAST) muscles in isometric strength measurement. Ten physically active men subject (Age: 23.6±2 years, height: 177±4 cm, weight: 72.3±4 kg) were voluntarily participated in this study. The subject’s legs muscle strength were measured by using electronic dynamometer while the heels positioned 4 cm above the base or not in random order. And than EMG activation of VL and GAST muscles were recorded in this time. All data were expressed as mean and SD. The statistical significance of differences between groups was evaluated by using the Wilcoxon two-samples test. Pearson correlation was used to define the relation between variables and level of significance was set at p<0.05. As a results, there were not significant differences between two positions at both EMG activation of VL and GAST muscles and strength of legs (p>0.05). Besides, the results showed that there were significant correlations between two positions that isometric leg strength (0.78) and EMG activities of VL and GAST musles (0.86) (0.71) respectively (p<0.05). Consequently, this study showed that elevated heels when performing the squat exercise were not affect motor neuron activation of VL and GAST muscles, so that there were not significanf changes at strength production

Özet

Topukları yükselterek yapılan izometrik kuvvet ölçümünün vastus lateralis (VL) ve gastrocnemius (GAST) kaslarının elektromyografik (EMG) aktivitesine olan etkisini incelemek amacıyla bu çalışmaya 10 gönüllü aktif erkek denek (Yaş: 23.6±2 yıl, Boy: 177±4 cm, Vücut Ağırlığı (VA): 72.3±4 kg) katılmıştır. Rastgele olarak teste alınma sırası belirlenen deneklerin topukları düz yere basarken ve topuklarının altında 4 cm yükseklik var iken bacak kuvvetleri elektronik dinamometre ile ölçülmüş, bu esnada alt ekstremite kaslarından VL ve GAST kaslarının EMG (elektromyografi) aktivitesi kayıt edilmiştir. Verilerin analizi için aritmetik ortalama, standart sapma ve parametrik olmayan testlerden “Wilcoxon Eşleştirilmiş İki Örnek Testi”, ilişkilerin belirlenmesi için “Pearson korelasyon katsayısı” kullanılmış, araştırmada güven aralığı 0.05 olarak kabul edilmiştir. Düz topukla (DT) ve yükseltilmiş topukla (YT) yapılan izometrik bacak kuvveti ölçümleri arasındaki fark ve iki farklı topuk pozisyonunda yapılan kuvvet ölçümleri esnasında kayıt edilen GAST ve VL kaslarının EMG aktiviteleri arasındaki fark istatistiksel olarak anlamlı bulunmamıştır (p>0.05). Parametreler arasındaki ilişkiler incelendiğinde düz topukla ve yükseltilmiş topukla yapılan izometrik kuvvet ölçümleri esnasında kayıt edilen VL kasının (DT VL EMG - YT VL EMG) EMG aktiviteleri arasında .86 ve GAST kasının EMG aktiviteleri (DT GAST EMG – YT GAST EMG) arasında ise .71 lik pozitif ilişki bulunmuştur. Bu çalışma bize skuat pozisyonunda ağırlık kaldırırken genelde stabilitenin sağlanması için yapılan topuk yükseltmenin VL ve GAST kaslarındaki motor nöronlarının devreye girmesinde bir artışa veya azalmaya neden olmadığını, buna bağlı olarak da kuvvet üretiminde anlamlı bir değişikliğin meydana gelmediğini göstermektedir

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Cite This Article

YAPRAK, Y., TINAZCI, C., ERGEN, E. (2009). EFFECTS OF ELEVATED HEELS ON EMG ACTIVITIES OF VASTUS LATERALIS AND GASTROCNEMIUS MUSCLES IN ISOMETRIC STRENGTH MEASUREMENT. SPORMETRE Beden Eğitimi ve Spor Bilimleri Dergisi, Cilt: 7 - Sayı: 2, 41–46. https://ajindex.com/articles/700863

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