Introdução: A Dor Patelofemoral (DPF) é uma das desordens musculoesqueléticas mais comuns que afeta indivíduos fisicamente ativo, sendo sua ocorrência maior entre as mulheres. Tal condição está relacionada com a presença de disfunções nos fatores locais, embora também haja associação com a ocorrência de disfunções nos fatores proximais e distais. Objetivos: Investigar o efeito imediato da mobilização de tornozelo na melhora da amplitude de dorsiflexão em cadeia cinética fechada em mulheres com DPF que tivessem restrição de dorsiflexão. Métodos: Foi realizado um Ensaio Clínico Aleatorizado com avaliador \"cego\", no qual 117 mulheres com DPF e com restrição de dorsiflexão em cadeia cinética fechada foram aleatoriamente distribuídas em três grupos de tratamento. Em cada grupo foi aplicada a técnica MWM (Mobilization With Movement) com um sentido específico de deslizamento articular da tíbia: Grupo Mobilização Anterior (GMA), n=39; Grupo Mobilização Posterior (GMP), n=39; Grupo Mobilização Anterior e Posterior (GMAP), n=39. A técnica MWM foi aplicada uma única vez, em quatro séries de cinco repetições com um minuto de descanso entre as séries. Nosso desfecho primário foi a amplitude de dorsiflexão em cadeia cinética fechada, e os desfechos secundários foram a intensidade da dor no joelho durante o Forward Step-Down Test (FSDT), a Escala de Percepção do Efeito Global (EPEG) e o Pico do Ângulo de Projeção no Plano Frontal (Pico-APPF) do membro inferior durante o FSDT. Todos os desfechos foram avaliados pré-tratamento (baseline), e reavaliados imediatamente e 48h pós-intervenção. Resultados: Todos os três grupos de tratamento produziram um aumento significativo na amplitude de dorsiflexão, porém apenas o GMA e o GMAP produziram um tamanho de efeito moderado. Os três grupos de tratamento produziram um aumento significativo na pontuação da EPEG, de forma que o GMA e o GMA tiveram um tamanho de efeito superior ao GMP. Apenas o GMA conseguiu produzir uma redução significativa da dor no joelho com um tamanho de efeito moderado. O GMA e o GMP produziram uma mudança significativa do Pico- APPF, porém com um tamanho de efeito que variou de pequeno a insignificante. Conclusão: A mobilização de tornozelo com deslizamento em sentido anterior ou com deslizamento em sentindo anterior e posterior produz maior efeito no aumento da amplitude de dorsiflexão. O ganho de dorsiflexão, por sua, vez, exerceu maior influencia na melhora da pontuação da EPEG, e uma pequena influência na redução da dor no joelho e na modificação do Pico-APPF durante o FSDT / Introduction: Patellofemoral Pain (PFP) is one of the most common musculoskeletal disorder that affect physically active individuals, being its occurrence highest among women. This condition is related with presence in local factors dysfunctions, although there is association with dysfunctions occurrence in proximal and distal factors. Objectives: To investigate the immediate effect of the ankle mobilization on dorsiflexion range improvement in closed kinetic chain in women with PFP who had restrict dorsiflexion. Methods: A Randomized Clinical Trial was performed with \"blinded\" assessor, in which 117 women with PFP was randomly distributed in three treatment groups. In each group, a Mobilization With Movement (MWM) technique was applied with a specific joint glide direction of the tibia: Anterior Mobilization Group (AMG), n=39; Posterior Mobilization Group (PMG), n=39; Anterior and Posterior Mobilization Group (APMG), n=39. The MWM technique was performed only once, in four series with five repetitions and with rest one minute between the series. Our primary outcome measure was the dorsiflexion range in closed kinetic chain, and secondary outcomes measures were the knee pain intensity during Forward Step- Down Test (FSDT), Global Perceived Effect Scale (GPES), and the Peak of Frontal Plane Projection Angle (Peak-FPPA) of the lower limb during FSDT. All outcomes measures were assessed before treatment (baseline), and re-evaluated immediately and 48h after intervention. Results: All three treatment groups produced a significant increased in dorsiflexion range of motion, however only the AMG and APMG produced a moderate effect size. All three treatment groups produced a significant increased on GPES score, so that AMG and APMG had a higher effect size than PMG. Only the AMG was able to produced a significant reduced of knee pain with a moderate effect size. The AMG and PMG produced a significant change in Peak-FPPA, however with an effect size that ranging from small to insignificant. Conclusion: The ankle mobilization with anterior glide or anterior and posterior glide produces a greater effect in increase dorsiflexion range of motion. Dorsiflexion gain, in turn, exerted greater influence on GPES score improvement, and a small influence on knee pain reduction and in Peak- FPPA modification during the FSDT

The ability to kneel is an important function of the knee joint, as it is required for many daily activities, including religious practices, professional occupations and recreational pursuits. The inability to kneel following total knee arthroplasty (TKA) is frequently a source of disappointment. This work investigates patients' understanding of the term 'kneeling' and what proportion of patients can kneel before and after TKA, as well as identifying the factors that can affect the ability to kneel following TKA. The underlying hypothesis tested was: 'There are no differences between kneeling ability before and after TKA'. Kneeling ability after TKA may be affected by many factors, including patient-specific factors, the extent of wear on RPC (Retro patellar Cartilage), postoperative AKP (Anterior Knee Pain) and post-operative ROM (Range of Motion). Thus a consecutive series of TKA patients were assessed to test the afore-mentioned hypothesis. In particular, the thesis has examined: • Interpretation of kneeling and perceptions of kneeling ability after TKA. • The extent of wear on Retro Patellar Cartilage (RPC) and its correlation to kneeling ability. • Sensory changes in the knee after TKA. • Preoperative and Postoperative Anterior Knee Pain (AKP) assessment. • The reality of kneeling ability before and after TKA. • Postoperative ROM of the knee and its correlation to kneeling function. The advice offered by healthcare professionals may contribute to a low postoperative rate of kneeling. The patellofemoral joint plays an essential role in knee function and a person's kneeling ability, may be greatly affected by the performance of this joint. Firstly, this study analysed the responses of two samples of participants drawn from diverse cultural backgrounds (Christian and Muslim), it examined their primary interpretation of what kneeling constitutes, along with a subjective assessment of the importance of kneeling in their everyday lives. Secondly, it explored patients' perceptions of their kneeling ability after TKA, with a comparative analysis of their responses to the kneeling questionnaire specifically constructed by the author and also the question in relation to kneeling in the Oxford Knee Score (OKS). The third component investigated retro-patellar cartilage (RPC) morphology using intraoperative examination and standardised photography. Fourthly, a cohort of patients listed for TKAs was followed prospectively, in order to assess their kneeling ability prior to and following treatment, along with identifying the factors that could affect this function, i.e. knee pain, range of motion, sensory changes and sensitivity to pain on the anterior aspect of the knee as assessed with dolorimetry. Differences were detected in the subjective interpretation of the kneeling function, as well as its importance, for the two diverse cultures involved in this study. Pain, as opposed to poor range of movement, was identified as the main reason which led to kneeling difficulties. The majority of respondents reported that it was either extremely difficult or impossible to kneel on the operated knee. The high flexed position (required for prayer in certain cultures) was the most difficult position to achieve for most of the patients. Prior to surgery, 30 patients were seen during this period, 15 (50%) out of 30 consecutive patients were unable to kneel in any position whatsoever. Of those who could kneel to some degree, the most common posture that they could achieve was the upright kneeling position. Considerable variations were found to occur in patients' understanding of the term 'kneeling'. Consequently, this has significant implications for the design and interpretation of questions in relation to kneeling for diverse cultures, which are characterised by distinct lifestyles. The current patient-based selfV administered questionnaires, such as the OKS, although useful as a simple measure of overall knee function, were found to have limitations as an effective assessment tool in the measurement of kneeling function either before or after TKA and indicate that there is a need for a culturally appropriate questionnaire to assess kneeling function. Retro-patellar cartilage lesions were very prevalent in patients undergoing TKA. However, no significant correlation existed between the total amount of retro-patellar cartilage wear and the ability to kneel. Patients were more likely to be able to kneel if the cartilage of the superior facets of the patella were disease free (P=0.02). At the six months post-surgery stage, of the 14 consecutive patients, who could kneel pre-operatively 6 were able to kneel post-operatively. Of the 13 consecutive patients who were unable to kneel pre-operatively, all were unable to kneel post-operatively. Knee pain was the main reason attributed to this difficulty. However, no link was found to occur between sensory changes and kneeling function in the patients who participated in the study, after TKA performed via an anterior midline incision.

The knee joint plays an essential role in the human musculoskeletal system. It has evolved to withstand extreme loading conditions, while providing almost frictionless joint movement. However, its performance may be disrupted by disease, anatomical deformities, soft tissue imbalance or injury. Knee disorders are often puzzling, and accurate diagnosis may be challenging. Current evaluation approach is usually limited to a detailed interview with the patient, careful physical examination and radiographic imaging. The X-ray screening may reveal bone degeneration, but does not carry sufficient information of the soft tissue conditions. More advanced imaging tools such as MRI or CT are available, but expensive, time consuming and can be used only under static conditions. Moreover, due to limited resolution the radiographic techniques cannot reveal early stage arthritis. The arthroscopy is often the only reliable option, however due to its semi-invasive nature, it cannot be considered as a practical diagnostic tool. Therefore, the motivation for this work was to combine three scientific methods to provide a comprehensive, non-invasive evaluation tool bringing insight into the in vivo, dynamic conditions of the knee joint and articular cartilage degeneration. Electromyography and inverse dynamics were employed to independently determine the forces present in several muscles spanning the knee joint. Though both methods have certain limitations, the current work demonstrates how the use of these two methods concurrently enhances the biomechanical analysis of the knee joint conditions, especially the performance of the extensor mechanism. The kinetic analysis was performed for 12 TKA, 4 healthy individuals in advanced age and 4 young subjects. Several differences in the knee biomechanics were found between the three groups, identifying age-related and post-operative decrease in the extensor mechanism efficiency, explaining the increased effort of performing everyday activities experienced by the elderly and TKA subjects. The concept of using accelerometers to assess the cartilage degeneration has been proven based on a group of 23 subjects with non-symptomatic knees and 52 patients suffering from knee arthritis. Very high success (96.2%) of pattern classification obtained in this work clearly demonstrates that vibroarthrography is a promising, non-invasive and low-cost technique offering screening capabilities.

Made available in DSpace on 2016-06-02T20:18:07Z (GMT). No. of bitstreams: 1 TeseGMS.pdf: 970423 bytes, checksum: fcf1b4de681ac0b5b8a61da7e6f0acae (MD5) Previous issue date: 2006-10-06 / The purpose of this study was to investigate onset, amplitude and ratio of electric activity of the vastus medialis oblique (VMO), vastus lateralis oblique (VLO) and vastus lateralis longus (VLL) muscle and the angle of the knee joint flexion at heel strike during walking on a treadmill. Fifteen subjects without (22-SD3 years) and twelve with patellofemoral pain syndrome (21-SD2 years) participated in this study. The subjects walked on a treadmill without and with inclination of 5 degrees for 10 minutes. Eight strides were analyzed for each situation. An eletrogoniometer was used to verify the knee flexion angle and a footswitch sensor to determinate the beginning and the end of each stride. An eletrogoniometer was used to verify the knee flexion and a footswitch sensor to inform the beginning and the end of each stride. The electric activity was recorded by surface electrodes (Ag/AgCl), an EMG device with 8 channels (EMG System of Brazil) and a software of acquisition data (AqDados 7.02.06). The electromyographic (EMG) data was processed by Matlab software, that calculated the onset timing of the muscles, the integral values of EMG signal and the EMG ratio (VMO:VLO and VMO:VLL). Knee flexion angle was significantly less in the subject with patellofemoral pain syndrome when compared with the subjects of control group. In the patellofemoral pain syndrome subjects, the EMG onset of vastus lateralis longus ocurred before that vastus medialis oblique, in contrast no such differences ocurred in the control group both during walking on a flat surface and on an inclined surface.The EMG activity of vastus lateralis longus muscle was significantly greater during walking in graded treadmill in the subjects with patellofemoral pain syndrome in relation to the subjects of the control group. The results also showed that to the electric activity of the vastus lateralis oblique muscles was always less than the electric activity of the vastus medialis oblique and/or vastus lateralis longus muscle in both groups, regardless condition. Furthermore, VMO:VLL and VMO:VLO activity ratios showed no significant differences between groups and conditions. The results of the present study showed that subjects with patellofemoral pain syndrome decreased the angle of the knee joint flexion, increased the EMG activity of the vastus muscles and presented EMG onset of vastus lateralis longus before that vastus medialis oblique during graded treadmill walking, suggesting that 5º of the inclination would not be safe for treatment for patients with patellofemoral pain syndrome. In addtion, findings showed less electric activity of the vastus lateralis oblique muscle in relation to the other stabilizers of patella, suggesting that vastus medialis oblique and vastus lateralis longus muscles maintain patellar alignment while VLO doesn t act as lateral stabilizer of the patella, but it acts in the dynamics of patellofemoral joint during gait. / O objetivo deste estudo foi investigar o o ângulo de flexão do joelho, o tempo de início da ativação muscular (onset), as relações (VMO:VLO e VMO:VLL) e a amplitude da atividade elétrica dos músculos vasto medial oblíquo (VMO), vasto lateral oblíquo (VLO) e vasto lateral longo (VLL) durante caminhar na esteira. Quinze sujeito sem (22±3 anos) e doze com síndrome de dor femoropatelar (21±2 anos) participaram desse estudo. Os sujeitos caminharam em uma esteira elétrica sem inclinação e com inclinação de 5 graus durante aproximadamente 10 minutos, sendo coletadas 8 passadas em cada situação. Foi utilizado um eletrogoniômetro para verificar o ângulo de flexão do joelho e um sensor tipo footswitch para informar o início e o final de cada passada. A atividade elétrica foi captada por meio de eletrodos de superfície simples diferenciais, um eletromiógrafo de 8 canais (EMG System do Brasil) e um programa de aquisição de dados (AqDados 7.02.06). O sinal elétrico obtido foi tratado por meio de rotinas do software Matlab 6.1 que calcularam o onset e a integral matemática da área abaixo da envoltória do sinal retificado e filtrado (amplitude) e as relações VMO:VLL e VMO:VLO. O ângulo de flexão do joelho foi significativamente menor nos sujeitos com síndrome de dor femoropatelar quando comparado com os sujeitos do grupo controle. A atividade do músculo vasto lateral longo foi significativamente anterior a ativação do músculo vasto medial oblíquo nos sujeitos do grupo com síndrome de dor femoropatelar, enquanto o contrário ocorreu nos sujeitos do grupo controle, independente da condição estudada. A amplitude (integral) da atividade elétrica do músculo vasto lateral longo foi significativamente maior durante o caminhar em superfície inclinada nos sujeitos com síndrome de dor femoropatelar em relação aos sujeitos do grupo controle. Os resultados também mostraram que a a atividade elétrica do músculo vasto lateral oblíquo foi sempre menor que a atividade elétrica do músculo vasto medial oblíquo e/ou vasto lateral longo em ambos os grupos, indiferente da condição (plana e inclinada). Além disso, não foram encontradas diferenças significativas nas relações VMO:VLL e VMO:VLO nas duas condições estudadas e em ambos os grupos. Os resultados do presente estudo mostraram que os sujeitos com síndrome de dor femoropatelar diminuiram o ângulo de flexão do joelho, aumentaram a atividade dos músculos vastos e apresentaram ativação do músculo vasto lateral longo precedendo a do músculo vasto medial oblíquo durante o caminhar em superfície inclinada, sugerindo que 5º de inclinação poderia não ser seguro para o tratamento de sujeitos com essa patologia. Além disso, os achados mostraram menor atividade elétrica do músculo vasto lateral oblíquo em relação aos demais estabilizadores patelares, sugerindo que os músculos vasto medial oblíquo e vasto lateral longo mantém o alinhamento patelar enquanto o VLO não é um estabilizador lateral da patela, mas atua na dinâmica da articulação femoropatelar durante o caminhar.

Submitted by Aelson Maciera (aelsoncm@terra.com.br) on 2017-05-23T18:50:24Z No. of bitstreams: 1 TeseAFS.pdf: 13567836 bytes, checksum: c5a315d5c2ca036adaf60af9cd1f3b41 (MD5) / Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2017-05-31T18:21:04Z (GMT) No. of bitstreams: 1 TeseAFS.pdf: 13567836 bytes, checksum: c5a315d5c2ca036adaf60af9cd1f3b41 (MD5) / Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2017-05-31T18:21:12Z (GMT) No. of bitstreams: 1 TeseAFS.pdf: 13567836 bytes, checksum: c5a315d5c2ca036adaf60af9cd1f3b41 (MD5) / Made available in DSpace on 2017-05-31T18:27:08Z (GMT). No. of bitstreams: 1 TeseAFS.pdf: 13567836 bytes, checksum: c5a315d5c2ca036adaf60af9cd1f3b41 (MD5) Previous issue date: 2017-05-05 / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Every year, up to 70% of recreational runners reported some musculoskeletal injury. Patellofemoral pain (PFP) is one of the most common injuries in these athletes. It has been reported that gait retraining may have a beneficial effect on the lower limb biomechanics and consequently may reduce the patellofemoral joint overload. However, the information regarding biomechanical and clinical effects after a training protocol in PFP runners and, the comparison between different techniques in a same cohort in order to identify the most effective are sparse. Therefore, the objectives of this thesis were: to evaluate the immediate and long-term effects of gait retraining of kinematic, electromyography, pain and function in PFP runners and; to verify the effectiveness of three running techniques on the patelofemoral joint stress in healthy runners. The three running techniques were: forefoot landing, step rate increase by 10% and forward trunk lean. Kinematic, kinetic and electromyography analysis were done. To assess pain and function, the visual analog scale and two self-reported questionnaires were used. The results showed that the three running techniques reduce pain intensity and improve function in PFP runners after 2 weeks of a supervised gait retraining and, these improvements are maintained 6 months after the intervention. The gait retraining increased the muscle pre-activation before the initial contact. Forefoot landing technique was the most effective condition for reducing patellofemoral joint loading. / Cerca de 70% dos corredores recreacionais apresentam alguma lesão musculoesquelética a cada ano, sendo a dor patelofemoral (DPF) uma das lesões mais comuns nesses atletas. Tem sido relatado que modificações na técnica de corrida promovem efeitos benéficos na biomecânica do membro inferior e, consequentemente, reduzem a sobrecarga sobre a articulação patelofemoral. Porém, há escassez de informação a respeito dos efeitos biomecânicos e clínicos após um protocolo de treinamento aplicado em corredores com DPF, além da ausência de estudos que tenham comparado diferentes técnicas de corrida aplicadas em uma mesma amostra, a fim de identificar a mais eficaz. Dessa forma, os objetivos da tese foram: avaliar os efeitos imediatos e a longo prazo do treinamento das técnicas de corrida sobre variáveis cinemáticas, eletromiográficas, dor e função em corredores com DPF; e verificar a eficácia das técnicas na redução do estresse patelofemoral em corredores sadios. As técnicas de corrida investigadas neste estudo foram: corrida com aterrissagem com o antepé, corrida com aumento de 10% da frequência da passada e corrida com aumento da flexão do tronco. Foram feitas análises cinemáticas, cinéticas e eltromiográficas da corrida. Para avaliação da dor e função, foram utilizadas a escala visual analógica e questionários traduzidos e validados para a língua portuguesa. Os resultados indicaram que as três técnicas de corrida reduzem a intensidade da dor e melhoram a função em corredores com DPF após 2 semanas de treinamento supervisionado e os ganhos clínicos são mantidos após 6 meses de intervenção. E a corrida com aterrissagem com antepé foi a técnica mais eficaz na redução do estresse patelofemoral em corredores sadios. / FAPESP: 2013/26318-7 / FAPESP: 2015/20306-2

<p>I&scaron;ča&scaron;enje, luksacija ili dislokacija ča&scaron;ice (patele), predstavlja povredu kolena prilikom koje dolazi do pomeranja patele iz patelofemoralnog dela zgloba kolena. Pri ovoj povredi dolazi do o&scaron;tećenja medijalnih mekotkivnih struktura kolena koje su zadužene za pravilno pomeranje ča&scaron;ice unutar patelofemoralnog zgloba. Nakon prve povrede kod velikog borja pacijenata razvije se hronična nestabilnost patelofemoralnog zgloba sa posledičnim recidivantnim luksacijama patele. Mehanizam nastanka hronične nestabilnosti nije u potpunosti razja&scaron;njen i smatra se multifaktorijalnim, a za jedan od faktora smatra se naru&scaron;avanje neurolo&scaron;ke regulacije pokreta kolena. Propriocepcija je složen neurolo&scaron;ki mehanizam koji nam omogućava mentalno mapiranje delova tela, sprečavajući prekomerne i nepravilne pokrete koji mogu dovesti do povređivanja. Za njegovu procenu u zglobu kolena najče&scaron;će se procenjuje osećaj pozicije zgloba (JPS &ndash; eng. &bdquo;Joint Position Sense&ldquo;) kao jedne od komponenti propriocepcije. Nerazja&scaron;njeno je koji je najbolji način za njegovu procenu u pogledu izbora različitih uglova fleksije kolena i pozicija ispitanika, ali i kakav je uticaj povreda struktura kolena na njega. U istraživanju su učestvovale isključivo osobe ženskog pola (15-17 godina), svrstane u tri kategorije od po 30 ispitanika. Prvu, kontrolnu grupu, činile su zdrave ne sportistkinje; drugu, grupu sportistkinja, činile su ispitanice koje su se takmičarski bavile ko&scaron;arkom; treću, grupu pacijentkinja, činile su osobe sa luksacijom ča&scaron;ice kolena. Za merenje JPS kori&scaron;ten je VICON optički sistem (&copy;Vicon Motion Systems Ltd. UK registered no. 1801446) za analizu pokreta. Za svaku grupu meren je JPS metodom pasivnog pozicioniranja-aktivne reprodukcije sa kolenom u različitim nivoima fleksije (30&deg;, 45&deg; i 60&deg;), u uspravnom, ležećem i sedećem položaju, nakon čega su rezultati bili poređeni između grupa. Na&scaron;i rezultati su pokazali da odabir pozicije ispitanika i ugla merenja ne utiče na JPS u zdravim populacijama, kontrolnoj grupi i grupi sportiskinja, niti postoji statistički značajna razlika odgovarajućih pozicija i uglova između ovih grupa. Za grupu pacijentkinja dobili smo da postoji deficit propriocepcije, i da je sedeći stav najosetljivijim za procenu deficita osećaja pozicija zgloba kolena. U odnosu na odgovarajuće uglove kontrolne grupe i grupe sportistkinja, kod pacijentkinja postoji statistički značajno veća gre&scaron;ka traženih uglova u sedećem stavu, zbog čega je ovaj stav karakterističan za ovu grupu. Takođe smo uočili da je najveća razlika pri uglu od 45&deg;, čineći ga kritičnim uglom za grupu pacijentkinja. Ono &scaron;to je ključni zaključak je da nakon povrede kolena po tipu luksacije ča&scaron;ice postoji neurolo&scaron;ki deficit kontrole pokreta kolena, koji potencijalno može dovesti do daljeg povređivanja. Obzirom da je JPS metod kumulativne procene proprioceptivnog sistema, dalja istraživanja bi trebala da budu usmerena na određivanje mesta o&scaron;tećenja istog, čime bi se postiglo bolje razumevanje funkcionisanja sistema regulacije pokreta kao i mogućnost sprovođenja efikasnijeg lečenja nakon povrede kolena.</p> / <p><!--[if gte mso 9]><xml> <o:DocumentProperties> <o:Author>Vukadin Milankov</o:Author> <o:Version>16.00</o:Version> </o:DocumentProperties> <o:OfficeDocumentSettings> <o:AllowPNG/> </o:OfficeDocumentSettings></xml><![endif]--><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>EN-US</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> 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No description available.

No / Objective To evaluate landing strategies of female football and basketball athletes with relation to possible injury mechanisms and disparity in injury. Design Descriptive laboratory study. Participants 52 female football players and 41 female basketball players. Main outcome measures Frontal plane projection angle (FPPA) was measured during the single leg land (SLL) and drop jump (DJ) screening tasks. Results 2 × 2 × 2 mixed factorial ANOVA showed significant main effects were observed for sport, whilst significant interaction effects were seen between sport and task. Females in both sports exhibited significantly greater FPPA values during the SLL task than the DJ task (p < 0.001). Basketball players demonstrated significantly greater FPPA values during SLL than football players (p < 0.001), whilst no differences were found between sports in the DJ task (p = 0.328). Conclusion Female basketball players display greater FPPA values during unilateral landing tasks than female football players which may reflect the greater ACL injury occurrence in this population. Injury prevention programs in these athletes should incorporate unilateral deceleration and landing tasks and should consider the specific injury mechanisms in each sport.

Le but de ce travail était de déterminer l’effet de déviations planaires tridimensionnelles in vitro du fémur sur l’évolution des variables biomécaniques de l’articulation du genou lors d’un mouvement de flexion de celle-ci. La cinématique du compartiment fémoro-tibial, les bras de levier de certains muscles de la cuisse ainsi que l’évolution du régime de contrainte de l’os sous-glénoïdien ont été étudiés. <p><p>Du point de vue de l’étude du régime de contrainte de l’os sous-glénoïdien, une méthodologie originale utilisant la jauge de contrainte enrobée d’une résine époxyde a été développée. Un électrogoniomètre à 6 DDL ainsi que 6 LVDT ont permis de mesurer respectivement la cinématique fémoro-tibiale et la course tendineuse des principaux muscles de la cuisse.<p><p>Trois designs expérimentaux ont été entrepris sur un total de 15 spécimens. Ces différents designs ont permis de réaliser des déviations de l’extrémité distale du fémur selon les plans transversal, frontal et sagittal suite à une ostéotomie fémorale localisée 10 cm au dessus de l’interligne articulaire fémoro-tibiale. Les variables biomécaniques ont été enregistrées avant section osseuse et suite à l’application de déviations par step de 6° compris entre des angulations de -18° à 18° selon les différents plans anatomiques. Les données des variables biomécaniques ont été obtenues lors du mouvement de flexion du genou.<p><p>Même si nous sommes conscients des limitations de nos travaux expérimentaux, les résultats de ceux-ci nous permettent d’apporter une réflexion nouvelle par rapport aux conséquences sur l’articulation du genou d’un désalignement du membre inférieur en intégrant la notion des tissus péri-articulaires (capsulaire, ligamentaire et musculaire) généralement absents des modèles théoriques employés.<p> / Doctorat en Sciences biomédicales et pharmaceutiques / info:eu-repo/semantics/nonPublished