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Abstract
Introduction : Le Y balance test propose une évaluation de l’équilibre dynamique principalement dans un contexte sportif et/ou de pathologies musculosquelettiques. L’activité physique étant souvent pratiquée en chaussures, il est intéressant d’explorer l’équilibre dans cette condition. L’objectif était d’évaluer la validité et la fiabilité du Y balance test avec et sans chaussures. Méthode : Vingt sujets jeunes asymptomatiques ont été testés au cours d’une journée. Une première session consistait à réaliser le Y balance test avec et sans chaussures par deux évaluateurs différents dans un ordre aléatoire. Après un repos de 2h, une deuxième session similaire a été menée. Pour évaluer la validité entre les résultats obtenus en condition chaussée et pieds nus, un coefficient de corrélation de Pearson a été calculé. L’étude de la fiabilité a été menée par le calcul du coefficient de dépendabilité (ᵩ), avec GENOVA (generalizability theory) par la méthode G-study et D-study, ainsi qu’une représentation graphique de Bland Altman. Résultats : La validité concourante de la condition chaussée par rapport à pieds nus était modérée à forte (0.68 ≤ r ≤ 0.93). Pour la fiabilité, les facteurs expliquant le plus la variance des résultats étaient les sujets (34.74 à 59.56 % de la variance), puis l’interaction sujets, évaluateurs, sessions (4.03 à 15.15 % de la variance). Les coefficients de dépendabilité (ᵩ) étaient bons à excellents pour les fiabilités intra évaluateur (0.68 ≤ ᵩ ≤ 0.83) avec 3 essais et inter évaluateurs (0.65 ≤ ᵩ ≤ 0.88) avec 2 essais dans les conditions chaussée et pieds nus. Discussion – conclusion : Le Y balance test peut être pratiqué en clinique avec ou sans chaussures, ce qui peut constituer une approche intéressante pour s’approcher des conditions réelles de terrain. Néanmoins, l’analyse par D-Theory montrait qu’il faut un minimum de 3 essais pour obtenir une excellente fiabilité.
Introduction : The Y balance test is an evaluation of dynamic balance – mainly in the context of sports – and musculoskeletal disorders. Because physical activity or sports are often performed with shoes, it is important to explore balance under this specific condition. The present study aimed to assess the validity and reliability of the Y balance test with shoes and in barefoot condition. Method : Twenty asymptomatic, young, healthy subjects were tested in one day. The first session included a Y balance test with shoes and in barefoot conditions by two different raters (random order). After a break of 2 hours, a second, similar session was conducted. To assess the validity between the results obtained with shoes and in barefoot condition, a Pearson correlation coefficient was calculated. Reliability was estimated with a dependability coefficient (ᵩ), GENOVA (generalizability theory) by the G-study and D-study methods, and Bland-Altman plots. Results : The concurrent validity of the condition with shoes compared with barefoot condition was moderate to strong (0.68 ≤ r ≤ 0.93). For reliability analysis, the main factors explaining the variance in the results were subjects (34.74–59.56 % of variance) and the interaction between subjects, evaluators, and sessions (4.03–15.15 % of variance).The coefficients of dependability (ᵩ) were good to excellent for the intra-rater reliability (0.68 ≤ ᵩ ≤ 0.83) with three trials and for inter-rater reliability (0.65 ≤ ᵩ ≤ 0.88) for two trials in both barefoot condition and with shoes. Discussion and conclusion : The Y balance test can be performed in clinical practice with shoes or in barefoot condition, which can be a note worthy approach to explore dynamic balance in ecological conditions. The G-study and D-study analysis showed that a minimum of three trials was required to obtain good to excellent reliability.
Introduction : The Y balance test is an evaluation of dynamic balance – mainly in the context of sports – and musculoskeletal disorders. Because physical activity or sports are often performed with shoes, it is important to explore balance under this specific condition. The present study aimed to assess the validity and reliability of the Y balance test with shoes and in barefoot condition. Method : Twenty asymptomatic, young, healthy subjects were tested in one day. The first session included a Y balance test with shoes and in barefoot conditions by two different raters (random order). After a break of 2 hours, a second, similar session was conducted. To assess the validity between the results obtained with shoes and in barefoot condition, a Pearson correlation coefficient was calculated. Reliability was estimated with a dependability coefficient (ᵩ), GENOVA (generalizability theory) by the G-study and D-study methods, and Bland-Altman plots. Results : The concurrent validity of the condition with shoes compared with barefoot condition was moderate to strong (0.68 ≤ r ≤ 0.93). For reliability analysis, the main factors explaining the variance in the results were subjects (34.74–59.56 % of variance) and the interaction between subjects, evaluators, and sessions (4.03–15.15 % of variance).The coefficients of dependability (ᵩ) were good to excellent for the intra-rater reliability (0.68 ≤ ᵩ ≤ 0.83) with three trials and for inter-rater reliability (0.65 ≤ ᵩ ≤ 0.88) for two trials in both barefoot condition and with shoes. Discussion and conclusion : The Y balance test can be performed in clinical practice with shoes or in barefoot condition, which can be a note worthy approach to explore dynamic balance in ecological conditions. The G-study and D-study analysis showed that a minimum of three trials was required to obtain good to excellent reliability.