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Motion analysis in basketball

Nardia-Rose Klem, Catherine Y Wild, Sian A Williams, Leo Ng
BACKGROUND: Despite the high prevalence of lower extremity injuries in female basketball players as well as a high proportion of athletes who wear ankle braces, there is a paucity of research pertaining to the effects of ankle bracing on ankle and knee biomechanics during basketball-specific tasks. PURPOSE: To compare the effects of a lace-up brace (ASO), a hinged brace (Active T2), and no ankle bracing (control) on ankle and knee joint kinematics and joint reaction forces in female basketball athletes during a cutting maneuver...
November 21, 2016: American Journal of Sports Medicine
Mari Leppänen, Kati Pasanen, Urho M Kujala, Tommi Vasankari, Pekka Kannus, Sami Äyrämö, Tron Krosshaug, Roald Bahr, Janne Avela, Jarmo Perttunen, Jari Parkkari
BACKGROUND: Few prospective studies have investigated the biomechanical risk factors of anterior cruciate ligament (ACL) injury. PURPOSE: To investigate the relationship between biomechanical characteristics of vertical drop jump (VDJ) performance and the risk of ACL injury in young female basketball and floorball players. STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: At baseline, a total of 171 female basketball and floorball players (age range, 12-21 years) participated in a VDJ test using 3-dimensional motion analysis...
September 16, 2016: American Journal of Sports Medicine
Pei-Chih Wen, Wei-Chih Cheng, Yu-Shuen Wang, Hung-Kuo Chu, Nick C Tang, Hong-Yuan Mark Liao
We introduce a technique of calibrating camera motions in basketball videos. Our method particularly transforms player positions to standard basketball court coordinates and enables applications such as tactical analysis and semantic basketball video retrieval. To achieve a robust calibration, we reconstruct the panoramic basketball court from a video, followed by warping the panoramic court to a standard one. As opposed to previous approaches, which individually detect the court lines and corners of each video frame, our technique considers all video frames simultaneously to achieve calibration; hence, it is robust to illumination changes and player occlusions...
May 2016: IEEE Transactions on Visualization and Computer Graphics
Artur Struzik, Jerzy Zawadzki
PURPOSE: The aim of this study was to present the methodology for estimation of a leg stiffness during a countermovement jump. The question was asked whether leg stiffness in the countermovement and take-off phases are similar to each other as demonstrated in previous reports. It was also examined whether the stiffness in left lower limb is similar to the one in right lower limb. METHODS: The research was conducted on 35 basketball players. Each participant performed three countermovement jumps with arm swing to the maximum height...
2016: Acta of Bioengineering and Biomechanics
D Conte, A Tessitore, K Smiley, C Thomas, T G Favero
This study aimed to analyse live and stoppage time phases, their ratio, and action played on half and full court in college basketball games. Differences were assessed for the entire games and between halves. Moreover, differences of the live/stoppage time ratio were analysed between games and game-based conditioning drills. Ten games as well as fifteen defensive, fourteen offensive and six scrimmage-type drills of the same division I men's college team (13 players) were analysed using time-motion analysis technique...
June 2016: Biology of Sport
Mohamed Ali Nabli, Nidhal Ben Abdelkrim, Imed Jabri, Tahar Batikh, Carlo Castagna, Karim Chamari
PURPOSE: To examine the relation between game performance, physiological responses, and field-test results in Tunisian basketball referees. METHODS: Computerized time-motion analysis, heart rate (HR), and blood lactate concentration [La(-)] were measured in 15 referees during 8 competitive games (under-19-y-old Tunisian league). Referees also performed a repeated-sprint test (RSA), Yo-Yo Intermittent Recovery Test level 1 (YYIRTL1), agility T-test, and 30-m sprint with 10-m lap time...
November 2016: International Journal of Sports Physiology and Performance
Robert H Brophy, Jonathon R Staples, John Motley, Ryan Blalock, Karen Steger-May, Mark Halstead
BACKGROUND: Female athletes are at significantly higher risk of noncontact ACL injury than males, particularly in pivoting sports such as soccer and basketball. Sex-based differences in proprioception and core stability may contribute to this elevated risk. QUESTIONS/PURPOSE: This study evaluates a novel method of assessing dynamic stability to test the hypothesis that healthy adolescent controls have sex-based differences in postural stability. METHODS: Seventy-nine male and 72 female subjects completed three rounds of dynamic postural stability testing...
February 2016: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
M Leppänen, K Pasanen, J-P Kulmala, U M Kujala, T Krosshaug, P Kannus, J Perttunen, T Vasankari, J Parkkari
Poor knee alignment is associated with increased loading of the joints, ligaments and tendons, and may increase the risk of injury. The study purpose was to compare differences in knee kinematics between basketball and floorball players during a vertical drop jump (VDJ) task. We wanted to investigate whether basketball players, whose sport includes frequent jump-landings, exhibited better knee control compared with floorball players, whose sport involves less jumping. Complete data was obtained from 173 basketball and 141 floorball players...
April 2016: International Journal of Sports Medicine
Hidetomo Suzuki, Go Omori, Daisuke Uematsu, Katsutoshi Nishino, Naoto Endo
BACKGROUND: A smaller knee flexion angle and larger knee valgus angle during weight-bearing activities have been identified as risk factors for non-contact anterior cruciate ligament (ACL) injuries. To prevent such injuries, attention has been focused on the role of hip strength in knee motion control. However, gender differences in the relationship between hip strength and knee kinematics during weight-bearing activities in the frontal plane have not been evaluated. HYPOTHESIS/PURPOSE: The purpose of this study was to determine the influence of hip strength on knee kinematics in both genders during a single-legged landing task in the frontal plane...
October 2015: International Journal of Sports Physical Therapy
Lorena Torres-Ronda, Angel Ric, Ivan Llabres-Torres, Bernat de Las Heras, Xavi Schelling I Del Alcazar
The purpose of this study was to measure differences in the cardiovascular workload (heart rate [HR]) and time-motion demands between positional groups, during numerous basketball training drills, and compare the results with in-game competition demands. A convenience sample of 14 top-level professional basketball players from the same club (Spanish First Division, ACB) participated in the study. A total of 146 basketball exercises per player (performed over an 8-week period in 32 team training sessions throughout the competitive season) and 7 friendly matches (FM) played during the preparatory phase were analyzed...
January 2016: Journal of Strength and Conditioning Research
R M A van der Slikke, M A M Berger, D J J Bregman, A H Lagerberg, H E J Veeger
Knowledge of wheelchair kinematics during a match is prerequisite for performance improvement in wheelchair basketball. Unfortunately, no measurement system providing key kinematic outcomes proved to be reliable in competition. In this study, the reliability of estimated wheelchair kinematics based on a three inertial measurement unit (IMU) configuration was assessed in wheelchair basketball match-like conditions. Twenty participants performed a series of tests reflecting different motion aspects of wheelchair basketball...
September 18, 2015: Journal of Biomechanics
Timothy E Hewett, Gregory D Myer, Adam W Kiefer, Kevin R Ford
PURPOSE: Knee abduction moment (KAM) is an injury risk factor for anterior cruciate ligament (ACL) injury that shows divergent incidence between males and females during adolescence. The objective of this study was to determine the relation between skeletal growth and increased KAM. The hypotheses tested were that females would demonstrate peak KAM during landing at peak height velocity (PHV) and that they would diverge from males at PHV. METHODS: The subject pool consisted of 674 females and 218 males (1387 female and 376 male assessments) who participated in a preseason testing session before their basketball or soccer seasons...
December 2015: Medicine and Science in Sports and Exercise
Aaron T Scanlan, Patrick S Tucker, Ben J Dascombe, Daniel M Berkelmans, Matthew I Hiskens, Vincent J Dalbo
Examination of activity demands and stoppage durations across game periods provides useful insight concerning fatigue, tactical strategies, and playing pace in team sports such as basketball. Therefore, the aims of this study were to quantify and compare game activity fluctuations across quarters in professional and semiprofessional basketball players. Video-based time-motion analyses were conducted across multiple games. Frequencies, total durations (in seconds), total distances (in meters), and mean velocities (in meters per second) were calculated for low-intensity movement (≤3 m·s), high-intensity movement (>3 m·s), shuffling, and dribbling activity...
November 2015: Journal of Strength and Conditioning Research
Aaron T Scanlan, Ben J Dascombe, Andrew P Kidcaff, Jessica L Peucker, Vincent J Dalbo
PURPOSE: To compare game activity demands between female and male semiprofessional basketball players. METHODS: Female (n=12) and male (n=12) semiprofessional basketball players were monitored across 3 competitive games. Time-motion-analysis procedures quantified player activity into predefined movement categories across backcourt (BC) and frontcourt (FC) positions. Activity frequencies, durations, and distances were calculated relative to live playing time (min)...
July 2015: International Journal of Sports Physiology and Performance
Takashi Sugiyama, Mai Kameda, Masahiro Kageyama, Kazufusa Kiba, Hiroaki Kanehisa, Akira Maeda
The present study aimed to clarify the asymmetry between the dominant (DL) and non-dominant takeoff legs (NDL) in terms of lower limb behavior during running single leg jumps (RSJ) in collegiate male basketball players in relation to that of the jump height. Twenty-seven players performed maximal RSJ with a 6 m approach. Three-dimensional kinematics data during RSJ was collected using a 12 Raptor camera infrared motion analysis system (MAC 3D system) at a sampling frequency of 500 Hz. The symmetry index in the jump heights and the kinematics variables were calculated as {2 × (DL - NDL) / (DL + NDL)} × 100...
December 2014: Journal of Sports Science & Medicine
Artur Struzik, Bogdan Pietraszewski, Jerzy Zawadzki
Basketball players usually score points during the game using the jump shot. For this reason, the jump shot is considered to be the most important element of technique in basketball and requires a high level of performance. The aim of this study was to compare the biomechanical characteristics of the lower limbs during a jump shot without the ball and a countermovement jump without an arm swing. The differences between variables provide information about the potential that an athlete can utilise during a game when performing a jump shot...
September 29, 2014: Journal of Human Kinetics
Daniele Conte, Terence G Favero, Corrado Lupo, Fabio M Francioni, Laura Capranica, Antonio Tessitore
The aim of this study was to assess elite women's basketball game performance. Five elite women's games (3 Italian first division and 2 Euroleague) were analyzed for individual and team time-motion analyses. The individual analysis evaluated the players' movement patterns with particular focus on high-intensity activity (HIA), sprint activity, and repeated sprint events (RSEs). Team analysis included live time (LT), stoppage time (ST), and their ratio, transfer (TR) phases, and half court and full court actions...
January 2015: Journal of Strength and Conditioning Research
Roland Leser, Armin Schleindlhuber, Keith Lyons, Arnold Baca
The main aim of this study was to determine the accuracy of the ultra-wideband (UWB)-based positioning system Ubisense, which is used for time-motion analysis in sports. Furthermore, some alternatives for positioning the system's transponders on the atheletes, as well as the accuracy depending on the location of measurement, were tested. Therefore, in a pre-study, some basic issues were examined (measurement assumptions and consistency and location of the system's transponder used for position detection), and position measurements at the borders and in the centre of a basketball field were performed...
2014: European Journal of Sport Science
Christopher J Sole, Gavin L Moir, Shala E Davis, Chad A Witmer
The purpose of this study was to determine the acute effects of heavy resistance exercise on agility performance in court-sport athletes. Five men (age: 20.6 ± 1.9 years; body mass: 79.36 ± 11.74 kg; body height: 1.93 ± 0.09 m) and five women (age 21.2 ± 2.7 years; body mass: 65.8 ± 10.18 kg; body height 1.77 ± 0.08 m) volunteered to participate in the present study. All subjects were NCAA Division II athletes who currently participated in tennis or basketball and all had previous resistance training experience of at least one year...
December 18, 2013: Journal of Human Kinetics
Hubert P H Shum, Edmond S L Ho, Yang Jiang, Shu Takagi
The recent advancement of motion recognition using Microsoft Kinect stimulates many new ideas in motion capture and virtual reality applications. Utilizing a pattern recognition algorithm, Kinect can determine the positions of different body parts from the user. However, due to the use of a single-depth camera, recognition accuracy drops significantly when the parts are occluded. This hugely limits the usability of applications that involve interaction with external objects, such as sport training or exercising systems...
October 2013: IEEE Transactions on Cybernetics
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