Journals / İstanbul Kanuni Sultan Süleyman Tıp Dergisi / 2022 / Cilt: 14 - Sayı: 2

Examination of Isokinetic Knee Strength and Hamstring/Quadriceps Ratios in Individuals with Anterior Cruciate Ligament Injury: ACL Injured Knee Versus Non-Injured Knee

Ön Çapraz Bağ Yaralanması Olan Bireylerde İzokinetik Diz Kuvveti veHamstring/Quadriceps Oranlarının İncelenmesi: Ön Çapraz Bağ Hasarlı Diz ve Yaralanmamış Diz

Pages
158–162
Publication Date
2022-10-18
DOI
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AI Summary & Key Takeaways

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

The absence of a significant difference in both strength and H/Q ratios at high angular velocities indicates that the movement is performed with less force than at lower angular velocities, and this situation strains the hamstring and quadriceps muscles less.

📌 3 Key Takeaways

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Objective & Hypothesis:Objective: The aims of this study were to compare the isokinetic forces and Hamstring/Quadriceps (H/Q) ratios in individuals with anterior cruciate ligament (ACL) injury sides and contralateral non-injured sides.
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Key Findings & Data:Isokinetic tests were performed with three different angular speeds (60° s/180° s/240° s) with five repetitions for 60° s and 180° s and 15 repetitions for 240° s or concentric contraction.
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Conclusion & Impact:The absence of a significant difference in both strength and H/Q ratios at high angular velocities indicates that the movement is performed with less force than at lower angular velocities, and this situation strains the hamstring and quadriceps muscles less.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objective: The aims of this study were to compare the isokinetic forces and Hamstring/Quadriceps (H/Q) ratios in individuals with anterior cruciate ligament (ACL) injury sides and contralateral non-injured sides. Method: Twenty-three male patients with unilateral acute ACL injury were included in the study. The isokinetic extension (Ex) and flexion (Flx) forces of both knees were measured using an isokinetic dynamometer. Isokinetic tests were performed with three different angular speeds (60° s/180° s/240° s) with five repetitions for 60° s and 180° s and 15 repetitions for 240° s or concentric contraction. Results: The mean age of the patients was 25.18, the mean height was 176.81, and the mean weight was 77.12. The mean time from ACL injury to the time of measurements was 37.47±11.11 days. When the isokinetic strengths of knees with ACL injury and knees without ACL injury were examined, there was a significant difference in Ex phase at an angular velocity of 60°s (p=0.012, 95% CI: 5.95–41.54). No significant difference was detected in both Ex and Flx phases of other angular velocities (p>0.05). Conclusion: As a result, the knee with an ACL injury generates less force than the knee without an ACL injury. H/Q ratios were also outside the normal range on the ACL damaged side only at 60 s angular velocity, as expected. The absence of a significant difference in both strength and H/Q ratios at high angular velocities indicates that the movement is performed with less force than at lower angular velocities, and this situation strains the hamstring and quadriceps muscles less.

Özet

Amaç: Çalışmamızın amacı, ön çapraz bağ yaralanmalı tarafları ve karşı taraf yaralanmamış tarafları olan bireylerde izokinetik kuvvetleri ve Hamstring/ Quadriceps oranlarını karşılaştırmaktır. Yöntem: Tek taraflı akut ön çapraz bağ yaralanması mevcut olan 23 erkek hasta çalışmaya dahil edildi. Her iki dizin izokinetik kuvvetleri dinamometre yardımıyla ölçüldü. İzokinetik testler üç farklı açısal hızda (60°sn/180°sn/240°sn) 60°sn ve 180°sn için beş tekrar ve konsantrik kasılma için 240°sn için 15 tekrar ile yapıldı. Bulgular: Hastaların ortalama yaşı 25,18 yıl, ortalama boyu 176,81 cm ve ortalama kilosu 77,12 kg idi. Ön çapraz bağ yaralanmasından ölçümlerin yapıldığı zamana kadar geçen süre ortalama 37,47±11,11 gündü. Ön çapraz bağ yaralanması mevcut dizler ile ön çapraz bağ hasarı olmayan dizlerin izokinetik kuvvetleri incelendiğinde, 60°sn'lik açısal hızda Ex fazında anlamlı bir farklılık vardı (p=0,012, %95 GA: 5,95–41,54). Diğer açısal hızların hem Ex hem de Flx fazlarında anlamlı bir fark tespit edilmedi (p>0,05). Sonuç: Ön çapraz bağ yaralanması olan diz, ön çapraz bağ yaralanması olmayan dizden daha az güç üretir. Hamstring/Quadriceps oranları da beklendiği gibi sadece 60°sn açısal hızda ön çapraz bağ hasarı olan tarafta normal aralığın dışındaydı. Yüksek açısal hızlarda hem kuvvet hem de Hamstring/Quadriceps oranlarında önemli bir fark olmaması, hareketin daha düşük açısal hızlara göre daha az kuvvetle yapıldığını ve bu durumun hamstring ve quadriceps kaslarını daha az gerdiğini göstermektedir.

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Cite This Article

SÜRÜCÜ, S., BOSTANCI, Ö., ÇOŞKUN, H. S., YILMAZ, A. K., AYDIN, M., KEHRİBAR, L., KABADAYI, M., YILMAZ, C. (2022). Examination of Isokinetic Knee Strength and Hamstring/Quadriceps Ratios in Individuals with Anterior Cruciate Ligament Injury: ACL Injured Knee Versus Non-Injured Knee. İstanbul Kanuni Sultan Süleyman Tıp Dergisi, Cilt: 14 - Sayı: 2, 158–162. https://ajindex.com/articles/550904

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