Comparing Anterior Cruciate Ligament Injury Risk Variables Between Unanticipated Cutting and Decelerating Tasks

Peel, Shelby A.; Schroeder, Lauren E.; Sievert, Zachary A.; Weinhandl, Joshua T.

doi:10.1123/jab.2017-0343

Cited by 10 publications

(11 citation statements)

References 37 publications

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“…Despite deceleration is present in all sprinting and CoD tasks, they have often been investigated individually. Peel et al [66] examined lower extremity biomechanics between both decelerating and 45° cutting tasks as well as the relationship between peak anterior shear force (ASF) and peak knee abduction moments (KAM) during both decelerating and cutting tasks. It has been found that the CoD task exhibited significantly higher initial contact knee abduction angles (p = 0.032, d = 0.62), higher KAM (p ≤ 0.001, d = 2.84) and larger ASF (p = 0.001, d = 1.42) compared to the decelerating task.…”

Section: The Importance Of Decelerationmentioning

confidence: 99%

“…In addition, it has been observed a negative correlation (p = − 0.43) between ASF and KAM during both decelerating and CoD tasks. While peak ASF increases, peak KAM decreases, indicating that these two variables are autonomous [66]. Due to these distinct differences, it could be suggested that measurement of deceleration as an isolated construct (without the CoD component) may be an appropriate assessment which can be used at an earlier stage of onpitch/court rehabilitation to examine an individual's ability to effectively apply braking forces as a pre-cursor to CoD.…”

Section: The Importance Of Decelerationmentioning

confidence: 99%

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Change of Direction Assessment Following Anterior Cruciate Ligament Reconstruction: A Review of Current Practice and Considerations to Enhance Practical Application

et al. 2019

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Change of direction (CoD) has been indicated as a key mechanism in the occurrence of anterior cruciate ligament (ACL) injury during invasion sports. Despite these associations, assessments of knee function in athletic populations at the time of return to sport following ACL reconstruction (ACLr) have often focused on strength and single-leg hop tests, with a paucity of evidence to describe the CoD characteristics. Therefore, the aim of this narrative review was to describe the movement strategies exhibited following ACLr during CoD tasks and to critically analyze the range of tests that have been used. Specifically, we examined their ability to identify between-limb deficits and individuals who display a heightened risk of secondary injury and/or reductions in their level of pre-injury performance. MEDLINE, PubMed and SPORT Discuss databases were used and 13 articles were identified that met the inclusion criteria. Examination of the available literature indicates that current field-based practices are not representative of relevant sport demands and are unable to effectively assess knee function following ACLr. Laboratory-based studies have identified residual deficits and altered movement strategies at the time of return to sport, and this in part may be related to risk of re-injury. However, these assessments exhibit inherent limitations and are not practically viable for monitoring progress during rehabilitation. Consequently, alternative solutions that are more-aligned with the multitude of factors occurring during CoD maneuvers in chaotic sports environments are warranted to allow practitioners to 'bridge the gap' between the laboratory and the sports field/court. This approach may facilitate a more informed decision-making process with the end goal being, a heightened 'return to performance' and a lower risk of re-injury.

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Section: The Importance Of Decelerationmentioning

confidence: 99%

Section: The Importance Of Decelerationmentioning

confidence: 99%

Change of Direction Assessment Following Anterior Cruciate Ligament Reconstruction: A Review of Current Practice and Considerations to Enhance Practical Application

et al. 2019

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“…(60) Dimana, ia menjaga kesetimbangan dengan basa konjugasinya (61-63) (konsentrasi ion borat 50-100 ppm setara dengan boron). Berdasarkan penelitian ternyata asam borat juga dapat digunakan pada pembangkit listrik tenaga nuklir (220)(221)(222) sebagai racun neutron. (64) Pembangkit listrik tenaga nuklir (65)(66)(67)(68) tidak menyumbang emisi karbon (69)(70)(71) sehingga tidak menyebabkan global warming (72)(73)(74)(75) seperti pembangkit listrik kebanyakan.…”

Section: Iunclassified

“…(2) Kation (108; 184; 194-196) bereaksi dengan percepatan menuju elektroda (197) negatif dan anion (108; 159; 194; 198; 199) bereaksi dengan percepatan menuju elektroda positif. Akan tetapi,saat ion bergerak melalui pelarut (200)(201)(202) maka ion akan mengalami gaya gesekan (203)(204)(205)(206)(207) memperlambat muatan (208) yang setara dengan kecepatannya.dan jika dianalogikan hukumStokes (209)(210)(211)(212)(213) untuk bola radius (190; 214-217) a dan s berlaku pada skala mikroskopis,maka kita dapat menuliskan gaya perlambatan (218)(219)(220)(221)(222) ini dibawah ini:…”

Section: Kecepatan Hanyutunclassified

Boric Acid (H3(BO3): Recognize The Molecular Interactions in Solutions

Dwynda¹,

Zainul²

2018

Preprint

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Asam borat biasa dikenal dengan asam boraks merupakan suatu monobasa dari asam Lewis boron lemah yang dapat digunakan sebagai antiseptik, insektisida, penyangga pH, atau penyerap neutron. Asam borat larut dalam air mendidih. Ketika senyawa ini dipanaskan pada suhu melebihi 170OC senyawa ini akan terdehidrasi kemudian membentuk HBO2 atau asam metaborat . Senyawa dengan rumus kimia H3BO3 ini terdapat dalam bentuk serbuk putih yang larut dalam air dan kristal yang tidak berwarna. Penilitian ini bertujuan untuk mengetahui struktur, karakteristik, bentuk molekul dan jenis ikatan dari asam borat. Untuk metode literasi jurnal digunakan aplikasi EndNote yang dijelaskan melalui fishbone state of art. Sedangkan metode yang digunakan untuk melihat hasil optimasi, energi serta gambar dari molekul digunakan metode komputasi dengan software ChemOffice 15.0. Berdasarkan metode ini diperoleh energi kinetik rotasi senyawa 0.3165, dipole/dipole 1.2329 dan energi total 5.1769 kcal/mol. Untuk konduktivitas, kecepatan hanyut, gerakan ion, dilakukan dengan menggunakan metode perhitungan dengan rumusan hasilnya dan beberapa soal yang dibuatkan grafiknya. Secara termodinamika, asam borat pada keadaan standar dan tekanan 1 atm memiliki ∆HoR -5351 kJ / kmol, ∆G°f -122.462 kJ / kmol dengan konstanta kecepatan reaksi k= 8,8727 L/kmol.s. dan Cp pada suhu 100oC sebesar 35,93 J/kgK serta Ho -16.636 J/mol. Proses pembuatan asam borat berlangsung secara spontan dapat dilihat melalui ∆G°f yang bernilai negatif dan terjadi reaksi eksoterm dapat dilihat berdasarkan perolehan ∆HoR yang negatif.

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“…Few studies conducted a biomechanical investigation of the deceleration task [ 15 , 25 ]. A recent prospective study by Dix et al [ 15 ] found significant differences in lower limb biomechanics between injured and uninjured female basketball players, advocating the deceleration task as a valuable screening task for ACL injury.…”

Section: Introductionmentioning

confidence: 99%

A 2D qualitative movement assessment of a deceleration task detects football players with high knee joint loading

Paolo

Zaffagnini

Tosarelli³

et al. 2021

Knee Surg Sports Traumatol Arthrosc

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Purpose The deceleration (pressing) is a common situational pattern leading to anterior cruciate ligament (ACL) injury in football. Although mainly assessed for performance purposes, a stronger focus on movement quality might support the screening of at-risk athletes. The aim of the present study was to describe a 2D scoring system for the assessment of the deceleration task and to associate it with the knee joint loading (knee abduction moment) evaluated through the gold standard 3D motion capture. The hypothesis was that lower 2D scores would be associated with higher knee joint loading. Methods Thirty-four competitive football (soccer) players (age 22.8 ± 4.1, 16 females) performed a series of deceleration tasks. 3D motion analysis was recorded using ten stereophotogrammetric cameras, a force platform, and three high-speed cameras. The 2D qualitative assessment was performed via a scoring system based on the video analysis of frontal and lateral planes joint kinematics for five scoring criteria. The intra- and inter-rater reliabilities were calculated for each 2D scoring criteria. The peak knee abduction moment was extracted and grouped according to the results of the 2D evaluation. Results An ICC > 0.94 was found for all the 2D scoring criteria, both for intra-rater and inter-rater reliability. The players with low 2D frontal plane scores and low total scores (0–4) showed significantly higher peak knee abduction moment values (p < 0.001). A significant negative rank correlation was found between the total score and the peak knee abduction moment (ρ = − 0.25, p < 0.001). Conclusions The qualitative 2D scoring system described successfully discerned between athletes with high and low knee joint loading during a deceleration task. The application of this qualitative movement assessment based on a detailed and accurate scoring system is suitable to identify players and patients with high knee joint loading (high knee abduction moments) and target additional training in the scenario of the primary and secondary ACL injury risk reduction. Level of evidence Level IV.

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Comparing Anterior Cruciate Ligament Injury Risk Variables Between Unanticipated Cutting and Decelerating Tasks

Cited by 10 publications

References 37 publications

Change of Direction Assessment Following Anterior Cruciate Ligament Reconstruction: A Review of Current Practice and Considerations to Enhance Practical Application

Change of Direction Assessment Following Anterior Cruciate Ligament Reconstruction: A Review of Current Practice and Considerations to Enhance Practical Application

Boric Acid (H3(BO3): Recognize The Molecular Interactions in Solutions

A 2D qualitative movement assessment of a deceleration task detects football players with high knee joint loading

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