The Effect of Eccentric Based Post Activation Performance Enhancement Intervention Applied at Different Angular Velocities on Jump Performance (Preliminary findings)

Abstract

The aim of this study was to investigate the acute effects of eccentric contraction performed at different angular velocities (60°/s and 150°/s) on jump performance and to comparatively evaluate the contribution of eccentric loading at different velocities to the post activation performance enhancement (PAPE) effect. The study was completed in three sessions with 8 male participants. In the first session, anthropometric measurements, dominant leg determination, vertical jump test performance for the control condition and Familirization for eccentric contraction were performed. The next sessions were randomized at 48-hour intervals. In the second session, participants performed a single set of 5 repetitions (rep) maximal eccentric contractions at an angular velocity of 60°/s and after a 7-minute transition phase, vertical jump tests were performed. In the third session, participants performed a single set of 5 rep. maximal eccentric contractions at an angular velocity of 150°/s and after a 7-minute transition phase, vertical jump tests were performed. The results showed that two different angular velocities had no statistically significant effect on jumping performance (p>0.05). However, when compared with the control condition, 150°/s (+2.24 cm) has a higher delta value than 60°/s (+0.71 cm). As a result, especially eccentric contractions applied at higher angular velocity showed an increases in jump performance, indicating that angular velocity may be an important factor in the emergence of the PAPE effect ( Cohen d: 0.56).

Keywords

• Eccentric contraction
• Angular velocity
• Post-activation Performance Enhancement
• Jumping

Farklı Açısal Hızlarda Uygulanan Eksantrik Temelli Aktivasyon Sonrası Performans Arttırma Girişiminin Sıçrama Performansına Etkisi (Ön bulgular)

Abstract

Bu çalışmanın amacı, farklı açısal hızlarda (60°/s ve 150°/s) gerçekleştirilen eksantrik temelli kasılmaların sıçrama performansı üzerine akut etkilerini araştırmak ve aktivasyon sonrası performans arttırma (ASPA) girişimine katkısını karşılaştırmalı olarak değerlendirmektir. Çalışma 8 erkek katılımcı ile üç seansta tamamlanmıştır. İlk seansta antropometrik ölçümler, dominant bacak belirleme, kontrol koşulu için dikey sıçrama test performansı ve eksantrik kasılma için familirizasyon gerçekleştirilmiştir. Sonraki oturumlar 48 saat aralıklarla rastgele şekilde gerçekleştirilmiştir. İkinci seansta katılımcılar 60°/s açısal hızda tek set 5 tekrar maksimal eksantrik kasılma gerçekleştirmiş ve 7 dakikalık bir geçiş fazının ardından dikey sıçrama testleri yapılmıştır. Üçüncü seansta, katılımcılar 150°/s açısal hızda tek set 5 tekrarlı maksimal eksantrik kasılma gerçekleştirmiş ve 7 dakikalık bir geçiş aşamasından sonra dikey sıçrama testleri yapılmıştır. Bulgular, iki farklı açısal hızın sıçrama performansı üzerinde istatistiksel olarak anlamlı bir etkisinin olmadığını göstermiştir (p>0.05). Bununla birlikte, kontrol koşuluyla karşılaştırıldığında, 150°/s (+2,24 cm) 60°/s'den (+0,71 cm) daha yüksek bir delta değerine sahiptir. Sonuç olarak, özellikle daha yüksek açısal hızda uygulanan eksantrik temelli kasılmaların sıçrama performansında artış göstermesi, açısal hızın ASPA etkisinin ortaya çıkmasında önemli bir faktör olabileceğini göstermektedir ( Cohen d: 0,56).

Keywords

• Eksantrik kasılma
• Açısal hız
• Aktivasyon Sonrası Performans Arttırma
• Sıçrama

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