BIOMECHANICAL CHARACTERISTICS OF THE UNDERSWING FROM THE LOWBAR TO THE HIGH BAR ON UNEVEN BARS
Notice bibliographique
Résumé
Aim. Identification and analysis of the kinematic and dynamic characteristics of the key elements of the underswing movement from the low bar to the high bar on uneven bars in women’s artistic gymnastics. Methods. This study aimed to optimize sports performances on uneven bars through a scientific approach. It involved seven gymnasts aged 12-15, who were members of Romanian national artistic gymnastics team. The analysis focused on exercises performed during the 2017 World Championships in Montreal. Various research methods were employed, including review of existing literature, use of video-computerized methods to analyze the techniques, employing the postural reference points and use of statistical and graphical representation methods. The study identified six key elements within the phasic structure of the underswing from the low bar (LB) to the high bar (HB) on uneven bars. These elements included preparatory movement phases (SF1.1, SF1.2, and SF2), basic movement phases, multiplication of body posture (MP) at maximum height of the center of gravity (GCG) or hip and concluding movement phases (PF1.1 and PF1.2). The angular features of body segments during the underswing were measured using Kinovea software, focusing on the angles between the hip and torso, and between the torso and arms. Anthropometric and biomechanical parameters necessary for the study were processed using the Physics ToolKit program. Kinematic characteristics such as segmental angular velocity and dynamic characteristics like the resultant force (N) were highlighted in the analysis. These findings provide valuable insights for optimizing gymnastic performances on uneven bars, enhancing technique and potentially improving competitive results. Results. Angular characteristics reveal the segmental angles of the body during various phases of the underswing from LB (low bar) to HB (high bar) on uneven bars. Analyzing these values provides a detailed picture of the positioning and evolution of the segmental angles. Anthropometric and biomechanical parameters that point out the basic moments of the underswing are presented. These parameters, including weight, height with arms stretched overhead, rotational inertia, and segmental movement radii highlight significant variations among athletes. An analysis of angular velocity and resultant force during the execution of the underswing from LB to HB on uneven bars offers a detailed perspective on the dynamics and effort involved in the different phases of the exercise. The results of the correlation analysis revealed the total number of links between the investigated indices, as well as their direction (negative and positive). The degree of connection varied from very weak correlations (42.87%) and weak ones (36.9%) to moderate (19.1%) and strong (1.2%) correlations. Variations occurred in the relations within movements phasic structure and in the specificities of each analyzed index. Conclusions. Using the video-computerized method in accordance with the method of postural reference points of the movement helped to identify and analyze the kinematic and dynamic characteristics of the key elements of the underswing from LB to HB on uneven bars. This fact can contribute to the improvement of sports performance on this apparatus. Keywords: women’s artistic gymnastics; key elements; angular features; angular velocity; resultant of force; performance.
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Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,003 | 0,002 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».