Inter- and intra-individual variability in the kinematics of the back squat
| Autor: | Michael Voigt, Mathias Vedsø Kristiansen, Gorm Henrik Fogh Rasmussen, Markus Esbjørn Sloth |
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| Rok vydání: | 2019 |
| Předmět: |
Adult
Male medicine.medical_specialty Knee Joint Weight Lifting Movement Acceleration Posture Biophysics Experimental and Cognitive Psychology Angular velocity Squat Kinematics Lifting strategy 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Motor control Consistency (statistics) medicine Humans Orthopedics and Sports Medicine Mathematics Analysis of Variance 030229 sport sciences General Medicine Intra individual Biomechanical Phenomena Resistance training medicine.anatomical_structure Thigh Hip Joint Ankle Ankle Joint Psychomotor Performance Movement variability Performance optimization 030217 neurology & neurosurgery |
| Zdroj: | Kristiansen, M, Rasmussen, G H F, Sloth, M E & Voigt, M 2019, ' Inter-and intra-individual variability in the kinematics of the back squat ', Human Movement Science, vol. 67, 102510 . https://doi.org/10.1016/j.humov.2019.102510 |
| ISSN: | 0167-9457 |
| DOI: | 10.1016/j.humov.2019.102510 |
| Popis: | The purpose of this study was to explore the level of inter- and intra-individual variability in the kinematic profiles of the back squat movement among skilled weightlifters. Ten competitive weightlifters volunteered for participation in this study. Barbell velocity (VBarbell) and angular velocity of the ankle (ωAnkle), knee (ωKnee) and hip joint (ωHip) were obtained by kinematic recording of six trials at 90% of 1RM in the back squat. Inter-individual variability was assessed by analysing inter-individual differences in the velocity curves through the statistical parametric mapping method. Intra-individual variability was assessed through a correlation analysis between the barbell velocity curves of each trial for each participant. Partial least squares regression analysis, was performed to relate changes in intra-individual variability to movement and anthropometric characteristics. Significant inter- and intra-individual differences were identified in VBarbell, ωAnkle, ωKnee, and ωHip (p ≤ 0.05). Having a short trunk and thigh, and a long shin in combination with greater anterior-posterior displacement of the barbell and slower velocities during the acceleration phase increased intra-individual movement consistency over movement variability. The results of the present study clearly demonstrate that skilled weightlifters display both significant inter- and intra-individual variability in the successful execution of the back squat. |
| Databáze: | OpenAIRE |
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