scholarly journals Detección de déficits neuromusculares a través del análisis del patrón de salto y aterrizaje en deportistas adolescentes

2021 ◽  
Vol 21 (3) ◽  
pp. 224-232
Author(s):  
Ariadna Benet-Vigo ◽  
Jordi Arboix-Alió ◽  
Alicia M. Montalvo ◽  
Gregory D. Myer ◽  
Azahara Fort-Vanmeerhaeghe
Keyword(s):  
Outcome Measure ◽  
Team Sports ◽  
Total Sample ◽  
Knee Valgus ◽  
Global Score ◽  
Foot Placement ◽  
Gender Comparison ◽  
Jump Landing ◽  
Secondary Objective ◽  
Equal Side

El objetivo principal del presente estudio fue analizar el rendimiento de la técnica del salto y aterrizaje en deportistas adolescentes mediante la versión modificada del Tuck Jump Assessment (TJA). Como objetivo secundario se compararon los resultados obtenidos, según sexo. Se puntuó cada variable de la herramienta mediante el análisis en video de la prueba de los 75 participantes incluidos en el estudio. Las variables contempladas fueron la puntuación global del TJA y cada criterio del instrumento: 1) Valgo de la extremidad inferior en el aterrizaje; 2) Muslos no paralelos (punto máximo de salto); 3) Muslos no alineados durante la fase de vuelo; 4) Mala alineación de los pies con los hombros; 5) Posición de los pies no paralela (de la punta al talón); 6) Contacto desigual de los pies (aterrizaje asimétrico); 7) Demasiado ruido en el aterrizaje; 8) Pausa entre saltos; 9) La técnica empeora antes de los 10 segundos; 10) No aterriza en el mismo punto (salto consistente).  Los valores promedios de la puntuación global de la versión modificada del TJA fueron 8,85±2,31 en el total de la muestra (8,85±2,63 hombres vs. 8,86±2,14 mujeres). Los resultados de la comparación según sexo indicaron diferencias significativas en el criterio 1 (χ2=10,288; p< 0,01), en el criterio 2 (χ2=20,788; p< 0,01), en el criterio 4 (χ2=22,587; p< 0,01) y en el criterio 10 (χ2=8,883; p< 0,01). En consecuencia, el análisis del patrón de salto y aterrizaje permite identificar alteraciones neuromusculares y biomecánicas del patrón de salto-aterrizaje. The main objective of the present study was to analyze the performance of the jump and landing technique in adolescent team sports athletes through the modified version of the Tuck Jump Assessment, (TJA). As a secondary objective, the results obtained were compared, according to sex. Each outcome measure of the tool was scored through video analysis of the test of the 75 participants included in the study. The main outcome measures were the total score of TJA and each of the ten items: Knee valgus at landing (1), thighs do not reach parallel (2), thighs not equal side-to-side (3), foot placement not shoulder width apart (4), foot placement not parallel (5), foot contact timing not equal (6), excessive landing contact noise (7), pause between jumps (8), technique declines prior to ten seconds (9), and does not land in the same footprint (10). The variables contemplated were the global score of the TJA and the ten criteria of the instrument. The average values of the global score of the modified version of the TJA were 8.85±2.31 in the total sample (8.85±2.63 men vs. 8.86±2.14 women). The results of the gender comparison indicated significant differences in item 1 (χ2=10,288; p< 0,01), item 2 (χ2=20,788; p<0,01), item 4 (χ2=22,587; p<0,01) and item 10 (χ2=8,883; p< 0,01). Consequently, the analysis of the jump and landing pattern makes it possible to identify neuromuscular and biomechanical alterations of the jump-landing pattern. O objetivo principal do presente estúdio fue analisar o rendimiento da técnica do salto e aterrissagem em deportistas adolescentes mediante a versão modificada do Tuck Jump Assessment (TJA). Como objetivo secundário se comparar os resultados obtidos, según sexo. Se puntuó cada variável do herramienta mediante a análise no vídeo da prueba dos 75 participantes incluidos no estudio. As variáveis contempladas na versão global do TJA e cada critério do instrumento: 1) Valgo de la extremidad inferior en el aterrizaje; 2) Muslos no paralelos (ponto máximo de salto); 3) Muslos no alineados durante la fase de vuelo; 4) Mala alineación de los pies con los hombros; 5) Posición de los pies no paralela (de la punta al talón); 6) Contacto desigual de los pies (aterrizaje asimétrico); 7) Demasiado ruido en el aterrizaje; 8) Pausa entre saltos; 9) La técnica empeora antes de los 10 segundos; 10) No aterriza en el mismo punto (salto consistente). Os valores prometidos da versão global modificada do TJA fueron 8,85 ± 2,31 no total da muestra (8,85 ± 2,63 hombres vs. 8,86 ± 2,14 mujeres). Os resultados da comparação segundo sexo indicaron diferencias relevantes no critério 1 (χ2 = 10.288; p <0,01), no critério 2 (χ2 = 20.788; p <0,01), no critério 4 (χ2 = 22.587 ; p <0,01) e o critério 10 (χ2 = 8.883; p <0,01). Na sequência, a análise do patrón de salto y aterrizaje permite identificar alterações neuromusculares y biomecánicas del patrón de salto-aterrizaje.

Sex and Maturation Differences in Performance of Functional Jumping and Landing Deficits in Youth Athletes

2019 ◽  
Vol 28 (6) ◽  
pp. 606-613 ◽  
Author(s):  
Azahara Fort-Vanmeerhaeghe ◽  
Ariadna Benet ◽  
Sergi Mirada ◽  
Alicia M. Montalvo ◽  
Gregory D. Myer
Keyword(s):  
Outcome Measures ◽  
Female Athletes ◽  
Knee Injuries ◽  
Knee Valgus ◽  
Clinical Tool ◽  
Cross Sectional ◽  
Foot Placement ◽  
Youth Athletes ◽  
Jump Landing ◽  
Main Effect

Context:Understanding how neuromuscular and biomechanical deficits that are associated with knee injuries change as youth mature may improve injury prevention strategies in this population.Objective:To investigate sex and maturation differences in jump-landing technique performance in youths using a practical clinical tool.Design:Cross-sectional study.Setting:High Performance Center Laboratory.Participants:A total of 165 youth athletes were included in this study.Main Outcome Measures:The main outcome measures were each of the 10 items of the modified tuck jump assessment and the total score. These measures include (1) knee valgus at landing, (2) thighs do not reach parallel, (3) thighs not equal side to side, (4) foot placement not shoulder width apart, (5) foot placement not parallel, (6) foot contact timing not equal, (7) excessive landing contact noise, (8) pause between jumps, (9) technique declines prior to 10 seconds, and (10) does not land in same footprint.Results:Only knee valgus at landing had a significant sex × maturation interaction. The main effect of maturation was significant for items 2, 3, 6, 7, 9, and total score. Plyometric technique performance improved with increasing maturation. The main effect of sex was significant for items 1 and 9, with males performing better than females.Conclusions:Female athletes demonstrate increased knee valgus at landing and fatigue relative to males during jump-landing performance. Overall, there was a trend of improved jump-landing performance with maturation.

Intelligibility in 3-Year-Olds With Cleft Lip and/or Palate Using the Intelligibility in Context Scale: Findings from the Cleft Collective Cohort Study

2021 ◽  
pp. 105566562098574
Author(s):  
Miriam Seifert ◽  
Amy Davies ◽  
Sam Harding ◽  
Sharynne McLeod ◽  
Yvonne Wren
Keyword(s):  
Cohort Study ◽  
Cleft Palate ◽  
Cleft Lip ◽  
Outcome Measure ◽  
Total Sample ◽  
Questionnaire Data ◽  
Outcomes Measurement ◽  
English Speaking ◽  
Children's Speech ◽  
Comparison Data

Objective: To provide comparison data on the Intelligibility in Context Scale (ICS) for a sample of 3-year-old English-speaking children born with any cleft type. Design: Questionnaire data from the Cleft Collective Cohort Study were used. Descriptive and inferential statistics were carried out to determine difference according to children’s cleft type and syndromic status. Participants: A total of 412 children born with cleft lip and/or palate whose mothers had completed the ICS when their child was 3 years old. Main Outcome Measure(s): Mothers’ rating of their children’s intelligibility using the ICS. Results: The average ICS score for the total sample was 3.75 ( sometimes-usually intelligible; standard deviation [SD] = 0.76, 95% CIs = 3.68-3.83) of a possible score of 5 ( always intelligible). Children’s speech was reported to be most intelligible to their mothers (mean = 4.33, SD = 0.61, 95% CIs = 4.27-4.39) and least intelligible to strangers (mean = 3.36, SD = 1.00, 95% CIs = 3.26-3.45). There was strong evidence ( P < .001) for a difference in intelligibility between children with cleft lip only (n = 104, mean = 4.13, SD = 0.62, 95% CIs = 4.01-4.25) and children with any form of cleft palate (n = 308, mean = 3.63, SD = 0.76, 95% CIs = 3.52-3.71). Children born with cleft palate with or without cleft lip and an identified syndrome were rated as less intelligible (n = 63, mean = 3.28, SD = 0.85, 95% CIs = 3.06-3.49) compared to children who did not have a syndrome (n = 245, mean = 3.72, SD = 0.71, 95% CIs = 3.63-3.81). Conclusions: These results provide preliminary comparative data for clinical services using the outcome measures recommended by the International Consortium for Health Outcomes Measurement.

scholarly journals Jump Landing Characteristics Predict Lower Extremity Injuries in Indoor Team Sports

2016 ◽  
Vol 37 (03) ◽  
pp. e10-e10 ◽  
Author(s):  
H. van der Does ◽  
M. Brink ◽  
A. Benjaminse ◽  
C. Visscher ◽  
K. Lemmink
Keyword(s):  
Lower Extremity ◽  
Team Sports ◽  
Lower Extremity Injuries ◽  
Jump Landing ◽  
Extremity Injuries

scholarly journals Combining Lovastatin and Minocycline for the Treatment of Fragile X Syndrome: Results From the LovaMiX Clinical Trial

2022 ◽  
Vol 12 ◽  
Author(s):  
Camille Champigny ◽  
Florence Morin-Parent ◽  
Laurence Bellehumeur-Lefebvre ◽  
Artuela Çaku ◽  
Jean-François Lepage ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Fragile X Syndrome ◽  
Outcome Measures ◽  
Primary Outcome ◽  
Outcome Measure ◽  
Fragile X ◽  
Combined Therapy ◽  
Primary Outcome Measure ◽  
Secondary Outcome ◽  
Global Score

Background: Limited success of previous clinical trials for Fragile X syndrome (FXS) has led researchers to consider combining different drugs to correct the pleiotropic consequences caused by the absence of the Fragile X mental retardation protein (FMRP). Here, we report the results of the LovaMiX clinical trial, the first trial for FXS combining two disease-modifying drugs, lovastatin, and minocycline, which have both shown positive effects when used independently.Aim: The main goals of the study were to assess the safety and efficacy of a treatment combining lovastatin and minocycline for patients with FXS.Design: Pilot Phase II open-label clinical trial. Patients with a molecular diagnostic of FXS were first randomized to receive, in two-step titration either lovastatin or minocycline for 8 weeks, followed by dual treatment with lovastatin 40 mg and minocycline 100 mg for 2 weeks. Clinical assessments were performed at the beginning, after 8 weeks of monotherapy, and at week 20 (12 weeks of combined therapy).Outcome Measures: The primary outcome measure was the Aberrant Behavior Checklist-Community (ABC-C) global score. Secondary outcome measures included subscales of the FXS specific ABC-C (ABC-CFX), the Anxiety, Depression, and Mood Scale (ADAMS), the Social Responsiveness Scale (SRS), the Behavior Rating Inventory of Executive Functions (BRIEF), and the Vineland Adaptive Behavior Scale second edition (VABS-II).Results: Twenty-one individuals out of 22 completed the trial. There were no serious adverse events related to the use of either drugs alone or in combination, suggesting good tolerability and safety profile of the combined therapy. Significant improvement was noted on the primary outcome measure with a 40% decrease on ABC-C global score with the combined therapy. Several outcome measures also showed significance.Conclusion: The combination of lovastatin and minocycline is safe in patients for FXS individuals and appears to improve several elements of the behavior. These results set the stage for a larger, placebo-controlled double-blind clinical trial to confirm the beneficial effects of the combined therapy.

scholarly journals Effect of Six Weeks of Progressive Jump-Landing Training on Jump Shooting Accuracy and Knee Valgus Angle in Male Basketball Players with Dynamic Knee Valgus

2021 ◽  
Vol 7 (2) ◽  
pp. 148-163
Author(s):  
Saeed Ghobadi Nezha ◽  
◽  
Seyyed Hosein Hoseini ◽  
Ali Asghar Norasteh ◽  
◽  
...  
Keyword(s):  
Evaluation Method ◽  
Knee Injuries ◽  
Training Group ◽  
Study Groups ◽  
Control Group ◽  
Knee Valgus ◽  
Basketball Players ◽  
Jump Landing ◽  
Valgus Angle ◽  
Quasi Experimental

Objective: Dynamic Knee Valgus (DKV) causes many acute and chronic knee injuries during deceleration and landing in sports activities and can affect the athletes’ specific skills. This study aims to investigate the effect of 6 weeks of progressive jump-landing training on jump shooting accuracy and knee valgus angle in male basketball players with DKV. Methods: This is a quasi-experimental study conducted on 24 male basketball players with DKV in Mazandaran, who were selected purposefully. They were randomly divided into training and control groups. Their jump shooting accuracy was assessed by Boddington’s Basketball Jump Shooting Accuracy Test, and their DKV angle was measured by a two-dimensional evaluation method in Quinoa software. In addition to their routine exercises, the training group performed the jump-landing training for 6 weeks at 3 sessions per week, while the control group performed their usual exercises only. In order to compare the two study groups, ANCOVA was used. Results: The progressive jump-landing program had a significant effect on jump shooting accuracy (P=0.001) and DKV angle (P=0.001). Conclusion: Six weeks of progressive jump-landing training can improve the jump shooting accuracy and knee valgus angle in basketball players with DKV. Therefore, jump landing exercises are recommended for improving the jump shooting skill and knee alignment in these athletes.

Predictors Of Knee Valgus Angle During A Jump-landing Task

2005 ◽  
Vol 37 (Supplement) ◽  
pp. S398 ◽  
Author(s):  
Darin A. Padua ◽  
Stephen W. Marshall ◽  
Anthony I. Beutler ◽  
Marlene DeMaio ◽  
Barry P. Boden ◽  
...  
Keyword(s):  
Knee Valgus ◽  
Jump Landing ◽  
Valgus Angle

scholarly journals 3D stereophotogrammetry facial analysis of Angle I subjects: gender comparison

2015 ◽  
Vol 44 (3) ◽  
pp. 137-142
Author(s):  
Ana Maria Bettoni Rodrigues da Silva ◽  
Laís Valencise Magri ◽  
Álvaro Augusto Junqueira Júnior ◽  
Marco Antônio Moreira Rodrigues da Silva
Keyword(s):  
Total Sample ◽  
Class I ◽  
Linear Measurements ◽  
Facial Analysis ◽  
Men And Women ◽  
Gender Comparison ◽  
Image Capturing ◽  
3D Stereophotogrammetry ◽  
Student’S T ◽  
Reference Parameters

Objective The aim of this study was to establish reference parameters for facial analysis in subjects with Angle’s Class I occlusion by means of stereophotogrammetry, comparing men and women. Material and method Twenty-six healthy young adults with Angle’s Class I occlusion volunteered to participate in the study, 15 males and 11 females, ages between 18 and 30 years old (22 years ± 5). These subjects were clinically examined to verify their type of occlusion. Twenty-five landmarks were performed in soft tissue, and those subjects underwent image capturing by the stereophotogrammetry technique, using the apparatus Vectra (M3-Canfield®). The following variables were measured in those images: naso-labial angle (C-Sn-Ls); (N-Prn-Pg); (N-Sn-Pg); mentolabial (Li-Ps-Pg); growth angle (T-Go-Pg), cheek area (T, Zy, Chk, Ch, Gn, Go), hemifaces' areas (T, Zy, Ft, Tr, N, Prn, C, Sn, Ls, Sto, Li Ps, Gn, Go), lip area, bilaterally (Ls, Cph, Ch, Li, Sto), and linear measurements of the lips and jaw. Result and conclusion The data were compared between genders (Student's t-test), and no statistically significant differences between groups (p>0.05) were found. Despite the limitations of this study, it is possible to conclude that, as there were no differences between men and women for the studied variables (angular, linear, and area), the data of the total sample (Class I) should be used as reference parameters in future studies. Additionally, the 3D stereophotogrammetry technique has proven to be a new possibility for facial analysis, which might be employed in several areas of dentistry.

Coaches’ Bases of Power and Coaching Effectiveness in Team Sports

2016 ◽  
Vol 3 (2) ◽  
pp. 128-144 ◽  
Author(s):  
Pär Rylander
Keyword(s):  
Collective Efficacy ◽  
Team Sports ◽  
Total Sample ◽  
Structural Equations ◽  
Future Research ◽  
Power Bases ◽  
Bases Of Power ◽  
Expert Power ◽  
The Individual ◽  
Coaching Effectiveness

The purpose of the current study was to investigate the relationship between team sport coaches’ power and coaching effectiveness using French and Raven’s (1959) taxonomy of power bases as a theoretical framework. Coaching effectiveness (CE) was conceptualized as an umbrella concept and four different CE outcomes were used; athletes’ satisfaction with the coach, coaches’ general influence, adaptive training behaviours, and collective efficacy. Hypotheses were made on the specific relationships between the individual power bases and the effectiveness criteria. The total sample consisted of 820 athletes (47% females), representing 56 elite and nonelite teams from three team sports (soccer, floorball, and team handball). Data were analysed separately for adults and youths. Structural equations modelling showed that 30% (in the youth sample) and 55% (in the adult sample) of the proposed hypotheses was supported. Overall, coaches’ bases of power were strongly associated with coaching effectiveness, explaining between 13% and 59% of variance in the effectiveness outcomes used. Expert power was consistently positively related to coaching effectiveness; reward and coercive power had mixed relationships (positively, negatively, unrelated) as had legitimate power (negatively, unrelated) and reward power (positively, unrelated). The results are discussed in relation to coaching effectiveness, limitations, practical implications and future research.

scholarly journals Instruction and Jump-Landing Kinematics in College-Aged Female Athletes Over Time

2013 ◽  
Vol 48 (2) ◽  
pp. 161-171 ◽  
Author(s):  
Jena Etnoyer ◽  
Nelson Cortes ◽  
Stacie I. Ringleb ◽  
Bonnie L. Van Lunen ◽  
James A. Onate
Keyword(s):  
Lower Extremity ◽  
Retention Test ◽  
Knee Flexion ◽  
Female Athletes ◽  
Initial Contact ◽  
Knee Valgus ◽  
Drop Jump ◽  
Jump Landing ◽  
Peak Knee ◽  
Hip Flexion

Context: Instruction can be used to alter the biomechanical movement patterns associated with anterior cruciate ligament (ACL) injuries. Objective: To determine the effects of instruction through combination (self and expert) feedback or self-feedback on lower extremity kinematics during the box–drop-jump task, running–stop-jump task, and sidestep-cutting maneuver over time in college-aged female athletes. Design: Randomized controlled clinical trial. Setting: Laboratory. Patients or Other Participants: Forty-three physically active women (age = 21.47 ± 1.55 years, height = 1.65 ± 0.08 m, mass = 63.78 ± 12.00 kg) with no history of ACL or lower extremity injuries or surgery in the 2 months before the study were assigned randomly to 3 groups: self-feedback (SE), combination feedback (CB), or control (CT). Intervention(s): Participants performed a box–drop-jump task for the pretest and then received feedback about their landing mechanics. After the intervention, they performed an immediate posttest of the box–drop-jump task and a running–stop-jump transfer test. Participants returned 1 month later for a retention test of each task and a sidestep-cutting maneuver. Kinematic data were collected with an 8-camera system sampled at 500 Hz. Main Outcome Measure(s): The independent variables were feedback group (3), test time (3), and task (3). The dependent variables were knee- and hip-flexion, knee-valgus, and hip- abduction kinematics at initial contact and at peak knee flexion. Results: For the box–drop-jump task, knee- and hip-flexion angles at initial contact were greater at the posttest than at the retention test (P &lt; .001). At peak knee flexion, hip flexion was greater at the posttest than at the pretest (P = .003) and was greater at the retention test than at the pretest (P = .04); knee valgus was greater at the retention test than at the pretest (P = .03) and posttest (P = .02). Peak knee flexion was greater for the CB than the SE group (P = .03) during the box–drop-jump task at posttest. For the running–stop-jump task at the posttest, the CB group had greater peak knee flexion than the SE and CT (P ≤ .05). Conclusions: Our results suggest that feedback involving a combination of self-feedback and expert video feedback with oral instruction effectively improved lower extremity kinematics during jump-landing tasks.

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