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A COMPARISON OF THE NATIONAL BASKETBALL ASSOCIATION’S ANNUAL NATIONAL BASKETBALL ASSOCIATION DRAFT COMBINE 2001 TO 2018
Get PDFThe current study investigated whether athlete performances in the National Basketball Association’s (NBA) Draft Combine are changing over time. The current study was conducted with data from the 2001 (n = 78) and 2018 NBA Draft Combine (n = 69) for ten combine assessments (data from NBA.com). Results indicated that athletes from 2018 exhibited better performance in lane agility time (p \u3c 0.05), maximum vertical jump (p \u3c 0.05), and three-quarter court sprint (p \u3c 0.001), but decreased performance in 185 lb. bench press (p \u3c 0.05), and a reduction in weight (p \u3c 0.05) and body fat percentage (p \u3c 0.001). No significant differences were found between years for height, standing reach, wingspan, and standing vertical jump. The current study illustrates the importance of understanding how combine results may be more or less indicative of NBA success for different years
CARDIORESPIRATORY FITNESS ALLEVIATES THE EFFECT OF FATIGUE ON BASKETBALL FREE THROW SHOOTING PERFORMANCE
Get PDFFatigue causes basketball players to change their movement patterns while shooting free throws, leading to missed shots. Cardiorespiratory fitness may moderate this negative relationship. Male collegiate basketball players completed a VO2max test to determine their fitness. On another day, each player shot 10 free throws, then performed a basketball-specific fatigue protocol, and then shot 10 more free throws. Shot accuracy, shot consistency, and shooting kinematics were calculated from video analyses. Shot accuracy was unchanged, shot consistency worsened (p = 0.03), and peak knee flexion angle increased (p \u3c 0.01) for all players following the fatigue protocol. Fitter players were more accurate (p \u3c 0.01) and more consistent (p = 0.02) when shooting while fatigued. Conditioning may be an important factor in free throw training
INTRA-INDIVIDUAL JOINT ANGLE VARIATION DURING THE TAKE-OFF STEP OF LONG JUMPERS WITH TRANSTIBIAL AMPUTATION – PRELIMINARY RESULTS
Get PDFBiomechanical knowledge of the long jump take-off step is not comprehensive for athletes with below the knee amputation (BKA), yet it is important for improving training protocols and performance. Three-dimensional motion capture (Vicon) and a mathematical rigid-body model (Dynamicus, Alaska) were used to calculate joint angles during repeated long jump take-off steps of athletes with and without BKA. Preliminary results indicate that those athletes with BKA who perform better during the long jump compared to another athlete with BKA, have relatively high intra-individual joint angle variation at the knee and hip joint at the instant of take-off compared to non-amputee athletes. The presented results may stimulate future research questions and can inform athletes and coaches during the development of training protocols
LONGITUDINAL ASSESSMENTS OF BALANCE AND JUMP-LANDING PERFORMANCE IN COLLEGIATE ATHLETES PRE AND POST ACL INJURIES
Get PDFThe purpose was to quantify the effect of anterior cruciate ligament (ACL) injuries on performance in a lower extremity reaching test and a jump-landing test in collegiate athletes. Eight Division I athletes performed these two tests prior to their ACL injuries. They also performed the reaching test 3 and 6 months after their ACL reconstruction surgeries and the jump-landing test 6 months after their surgeries. Participants demonstrated decreased reaching distances for the injured leg and increased reaching distance asymmetries at 3-month and 6-month post-surgery compared pre-injury (p
Do the torso muscles produce torso twist in front crawl?
Get PDFThe purpose of this study was to investigate the association between torso muscle activity and torso twist. EMG data from five torso muscles and 3D motion capture data were recorded during 4x25m front crawl swimming trials at 400m and 50m pace (N=15). EMG data were integrated over 10ms intervals and normalized to the maximum value during each swimming trial (%iEMG) and torso twist acceleration was calculated as the second time derivative of the relative angle between thorax and pelvis about the longitudinal axis. Spearman correlations were calculated between 5th percentile scores of %iEMG and torso twist acceleration. Mean correlation coefficients were weak (i.e. r \u3c 0.30) for all muscles at both paces. The findings suggest that torso muscle activity may not be directly associated with torso twist acceleration
PREDICTION OF THROWING DISTANCE IN THE MEN\u27S JAVELIN AT THE 2017 IAAF WORLD CHAMPIONSHIPS
Get PDFThe purpose of this study was to identify key biomechanical parameters that predict throwing distance in elite male javelin throwers. Biomechanical data from 13 male javelin throwers who competed at the 2017 IAAF World Championships were obtained from a freely available IAAF report. A regularised regression model was used to determine the associations between throwing distance and release parameters, whole-body kinematic, and joint-level kinematic data. The model indicated that delivery step distance (r = 0.69), release velocity (r = 0.85), distance between left foot and javelin grip at the beginning of the delivery phase (r = 0.47), and the angle of the support leg’s knee joint at the instance of release (r = 0.56) were all important predictors of throwing distance in elite male javelin throwers at the 2017 IAAF World Championships
BIOMECHANICAL ANALYSIS OF THE MOMENT ABOUT THE CENTER OF MASS DURING THE DOWNSWING PHASE IN WOMEN’S DRIVER SHOT
Get PDFThe purpose of this study was to investigate the moment about the center of mass (CM) acting on the golfer-club system during the downswing phase in women’s driver shots. Fourteen female golfers volunteered as subjects. The maximum clubhead speed, angular momentum ot the thorax and moment about the CM were calculated. There was a strong significant correlation between the frontal-plane moment about the CM and the maximum clubhead speed (
HOW FEMALE COLLAGIATE GYMNASTS GENERATE A DOUBLE TWIST IN THE BACKWARD STRETCHED SOMERSAULT
Get PDFThe purposes of this study were to describe how female gymnasts generate a double twist in the backward stretched somersault and to draw suggestions to improve twist techniques of female gymnasts by analysing female gymnasts twist motion three-dimensionally. Three varsity female gymnasts performed thebackward stretched somersault with a double twist several times and were motion-captured with a Vicon system (250 Hz). The angular velocities and angular momenta of the body segments and whole bodywere calculated, based on the Tang’s method. The female gymnasts of the contact-type twisted the trunk, especially the upper torso largely before the aerial-type onelaterallyflexed her trunk after the toe-off with her right arm swinging down.For female gymnasts who intend to gain larger twist angular momentum or increase it, it is recommended to quickly move the opposite arm and twist the upper torso toward the twist direction during the take-off phase
DETECTING PHYSICAL FATIGUE USING ACCELEROMETER IN BASKETBALL PLAYERS
Get PDFThis study was to determine the feasibility of using an accelerometer to detect changes during fatiguing activities in basketball players. Eight male recreational basketball players performed a fatigue protocol with a set of basketball-related activities. A tri-axial accelerometer was used to monitor the changes in acceleration. Thesummatedacceleration of each direction and the completion time were analyzed. The fatigue process was divided into three fatigue levels (0, 50, and 100 %). The results showed that thesummatedacceleration of the vertical direction was significantly different between 0 % and 100 % fatigue levels (p \u3c 0.05) and had a positive link with the completion time (r = 0.87). These findings suggest that the accelerometer can be developed as a monitoring tool to differentiate between a non-fatigued and a fatigued condition in basketball players
MOVEMENT HISTORY AND SKILL LEVEL IMPACT MOTOR EXPLORATION OF NOVEL HUMAN MACHINE INTERACTIONS: A PRELIMINARY STUDY
Get PDFThe current study provides preliminary data from an investigation of the relationship between movement history and skill on the approach a person takes to explore human machine interactions (HMI). We recruited participants representing a spectrum of athletic performers to non-performers to complete a set of manual dexterity tests as well as three tasks related to different aspects of HMI. Currently, our main finding is that dexterity seems to be related to goal discovery in the free search task, though it is not related to task completion time under an instructed task nor rating of utility of HMI. Ultimately, these results might be extended to inform HMI training and determine candidates for devices