BackgroundTwo-dimensional frontal plane knee projection angle (FPKPA) has been used to assess dynamic knee alignment during single leg squat in athletes with patellofemoral pain and to screen athletes who are at risk for anterior cruciate ligament (ACL) injury. The Dynamic Taping (DT) could be used in motor control training to decrease load of lower limbs muscles and improve movement pattern.ObjectiveCompare FPKPA before and after the application of dynamic taping in female volleyball athletes.DesignCross-sectional study.SettingThe FPKPA was used to measure knee medial motion. The ICC was 0.90 and the standard error of measurement (SEM) was 1.65°. All these measurements were performed at Minas Tenis Clube.Patients (or Participants)18 female volleyball players participated in this study; the mean for age was 19.44±4.48 years; body mass, 72.28±8.20 kg; and height 182.67±7.63 cm.Interventions (or Assessment of Risk Factors)A spiral DT(double-layer /Powerband) technique was placed with the hip in 40° abduction, 20° extension and full available external rotation, aiming to resist hip adduction, flexion and internal rotation. The tape was applied by the same professional stretching until resistance begins such that increasing resistance would be created with any movement towards adduction, internal rotation and flexion thereby creating a deceleration force.Main Outcome MeasurementsThe FPKPA was recorded during single leg squat until 80° knee flexion before and after the Dynamic Taping(R) application.Results10 of 18 athletes had high FPKPA (>8o) and the T-test revealed statistical difference pre and post DT (p<0,0001). Pre DT Mean of FPKPA was 10.5o and Post DT mean was 5.4o.ConclusionsThis study has shown the DT application decreased FPKPA during single leg squat in female volleyball athletes. This approach could be an important tool to enhance movement quality and prevent knee injuries.
Resumo Objetivo O objetivo deste estudo é determinar se lesões prévias de ombro e joelho estavam associadas ao índice de fadiga isocinética e razão agonista/antagonista dos rotadores internos/externos do ombro e flexores/extensores do joelho em jogadores de voleibol. Métodos Esta é uma investigação transversal com 49 jogadores de voleibol de elite que competem em alto nível no Brasil. O índice de fadiga isocinética e os perfis de agonistas/antagonistas foram avaliados durante a pré-temporada. Além disso, para registro de lesões anteriores, os atletas responderam a um questionário padronizado. Conduzimos uma análise da curva de característica de operação do receptor (receiver operating characteristic, ROC) para determinar a força de associação e o ponto de corte clinicamente relevante de variáveis com significância estatística na área sob a curva (AUC) (α = 0,05). Um teste t independente comparou as variáveis isocinéticas entre atletas com e sem lesão prévia (α = 0,05). Resultados Os resultados da análise da curva ROC indicam que os valores do índice de fadiga dos isquiotibiais a 300o/s foram associados à presença de lesão prévia no joelho (área soba a curva [AUC] = 73%, p = 0,004), enquanto os valores do índice de fadiga dos rotadores externos do ombro a 360°/s não foram associados à presença de lesão prévia no ombro (AUC = 68%, p = 0.053). Conclusões Atletas de voleibol de elite que relataram lesões anteriores no joelho estavam propensos a um índice de fadiga maior do que aqueles que não relataram lesões. O treinamento de resistência de flexores do joelho pode ser útil para atletas com relatos de lesões no joelho na temporada anterior.
BackgroundPatellar tendinosis is a degenerative condition that could lead to tendon rupture. Conservative treatment is long-term and surgery may be required to enhance tissue regeneration. Therefore, the athlete could have his/her successful career jeopardized. Some clinical tests, usually used in patellar tendon assessment, could be associated to patellar tendon morphologic abnormalities (PTA). However, their relationship to PTA is not established and they could be used in sports practice as a strategy for preventive care.ObjectiveTo investigate the association of VISA-P questionnaire, single-leg decline squat test and patellar tendon pain history to tendon morphological abnormalities at ultrasound.DesignCross-sectional study.SettingAthletes filled in VISA-P questionnaire, performed the single-leg decline squat test (SLDS) and informed about patellar tendon pain history. Athletes with Osgood-Schlater and/or Siding-Larsen-Johansson disease were excluded. An experienced examiner performed the ultrasonographic exam in tendon sagittal and transverse planes. Tendons that presented hypoechoic areas and thickness were considered as positive for morphological abnormalities.Participants43 athletes (26 volleyball, 14 basketball, 3 running) participated in this study, 38 males and 5 females, mean age of 24.8±6.7 years, weight of 87.6±13.7 kg and height of 1.93 ±0.1 m.Risk factor assessmentVISA-P, single-leg decline squat test and patellar tendon pain history.Main outcome measurementsPatellar tendon hypoechoic areas and thickness at ultrasound.ResultsSignificant associations to PTA were found. VISA-P showed an OR of 5.4 (1.3–26), SLDS of 3.8 (1.4–11) and pain history of 7.5 (1.6–42). Therefore, an athlete who presents a score under 80 points at VISA-P, for example, have 5.4 more chance to present PTA compared to an athlete that does not have PTA.ConclusionsVISA-P, SLDS and patellar tendon pain history can be easily applied in clinical practice and should be used as a screening tool in sports modalities that present a high PTA prevalence.
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