ISBS (International Society of Biomechanics in Sports): Conference Proceedings Archive
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THE COMPARISON OF DIFFERENT ELASTIC TENSION OF KINESIO TAPING ON GASTROCNEMIUS MUSCLE ACTIVATION
Get PDFThe purpose of this study was to compare the effect of different elastic tension of Kinesio taping on gastrocnemius muscle activation. Thirty-seven healthy athletes was recruited and randomly divided into three groups: Elastic tension 0% (N = 13), 10% (N = 12), and 20% (N = 12). All athletes were applied Kinesio taping on gastrocnemius muscle in 3 different elastic tape tensions. The wireless electromyography was used to assess the gastrocnemius muscle activation before and after applied Kinesio taping while jogging on treadmill. The results showed that a significant interaction between different elastic tape tension and pre-post taping applied (
INFLUENCE OF CYCLIST SADDLE SETBACK ON KNEE JOINT FORCES
Get PDFDespite the rapid development of bike fitting services, there is still a lack of scientific evidence on the effects of specific bicycle’s parameters on overuse injuries. The aim of this study was to investigate the influence of saddle setback on knee joint forces. Eleven cyclists experimented three saddle setback conditions while pedaling at a steady power output of 200 W and a cadence of 90 rpm. Using a static optimization procedure based on a musculoskeletal model, we estimated knee joint forces. As a first verification step, our preliminary results showed great similarity between muscle activations estimated from the modeling and experimental data (EMG) especially for the knee extensor muscles. Secondly, tibiofemoral joint forces tend to show that a forward sitting position increases tibiofemoral joint shear forces
CARRYING A BALL CAN INFLUENCE SIDESTEPPING MECHANICS IN RUGBY
Get PDFSidestepping mechanics have been implicated as a risk factor for knee injury in rugby. Carrying a ball is proposed to alter movement patterns. Therefore the purpose of the study was to examine the effects of sidestepping with a ball compared to sidestepping without a ball on lower-extremity biomechanics in male rugby athletes. Three-dimensional kinematics of 18 male rugby athletes were recorded during a maximal effort 45° sidestepping task without and with a ball. Sidestepping with a ball resulted in 15% greater knee adduction angle during weight acceptance and 18% greater hip adduction angle during peak pushoff than without a ball. Future biomechanical evaluations of athletes require the inclusion of the ball specific to the sport to ensure accurate interpretation of movement patterns
EFFECTS OF FUNCTIONAL KNEE BRACE ON BIOMECHANICAL PARAMETERS FROM DIFFERENT HEIGHTS OF DROP LANDING
Get PDFThe purpose of this study was to investigate differences of the kinematic, and kinetic between wearing FKB and non-braced during the drop landing tasks. Subjects were required wearing FKB and non-braced to perform a single leg drop landing task from heights of 10, 30, and 50cm. Our findings indicated that wearing functional knee braces or not didn’t significantly affect biomechanical parameters during drop landing for healthy subjects. As box height increased, body position would change to a softer landing posture to buffer the impacts. This mechanism did not affect by wearing FKB. Therefore, no matter wearing FKB or not, poor landing mechanism, such as stiff landing, was the main reason to increase the possibility of ACL injuries
ALTERATIONS IN LANDING MECHANICS DURING FORWARD JUMP IN INDIVIDUALS WITH CHRONIC ANKLE INSTABILITY
Get PDFThe purpose of this study was to investigate the effects of different distance forward jump among the healthy control, coper, and CAI groups. Participants were asked to perform a single-leg forward hop and followed with a single-leg landing on the force plate. The forward jump distance was standardized to 50%, 100%, and 150% of leg length from the center of the force platform. Results from the current study indicated two major findings: the CAI group were use greater ankle external rotation to avoid the possibility of ankle sprains during single-leg landings. During descending phase of landing, the CAI group demonstrated a greater medio-lateral GRF compared to healthy group. Our findings indicated that different landing strategy of ankle joints exist among 3 groups
THE RELATIONSHIP BETWEEN OPTIMAL KNEE FLEXION ANGLE AND HAMST RING FLEXIBILITY: INDICATION FOR HAMSTRING STRAIN INJURY
Get PDFThe purpose of this study was to determine the relationships among hamstring flexibility, optimal knee flexion angle for maximal knee flexion moment, maximal knee flexion moment. Ten male and 10 female reactional athletes were tested for hamstring flexibility and isokinetic strength. The maximal knee flexion moment and the knee flexion angle corresponding to the maximal knee flexion moment were determined for each participant. Optimal knee flexion angle was a function of hamstring flexibility score and gender, but not of the hamstring strength. Optimal knee flexion angle and hamstring strength were not correlated. These results indicate that hamstring muscle optimal length is correlated to its flexibility, but not to its strength. Increased hamstring flexibility is correlated with increased muscle optimal length. Hamstring flexibility may be a risk factor for hamstring strain injury
THE EFFECTS OF WHOLE BODY VIBRATION ON POSTURAL CONTROL: THE FREQUENCY OF STIMULATION
Get PDFThis study investigated the efficacy of high and low-frequency acute whole-body vibration (WBV) on postural control ability. WBV stimulus were applied the following determinants: (1) type (vertical) (2) frequency (30 and 40 Hz), (3) stance position (static squat position), (4) amplitude (4mm mm), (5) knee flexion angle (120°) and time (60s).Motion of the point of application of the vertical component [medio-lateral (ML) and anterio-posterior (AP)] of the ground reaction force (center of pressure, COP). The study results showed that static WBV stimuli given at low and high frequencies and 4 mm amplitude resulted in a different postural adaptation (
COMPARISON OF LINEAR AND ANGULAR SWING VELOCITIES WITH DIFFERENTLY WEIGHTED WARM-UP BATS IN SOFTBALL PLAYERS
Get PDFSwing velocity has been considered as one of the essential factors of bat swing biomechanics, and traditionally coaches and players think it can be altered by using a differently weighted bat for warm-up before an at bat. The purpose of this study was to examine the effects of 3 differently weighted warm-up bats on 3D linear and angular kinematics. Ten female varsity softball players were recruited and bat swing kinematics with normal (NW), heavy (HW), and light (LW) weighted warm-up bats were collected. Both linear and angular kinematic variables were compared between different bat weights using RMANOVA. Only 1 velocity variable difference between LW and NW, and 4 temporal differences between HW and NW were found. It is suggested that in general, swing kinematics is not altered by differently weighted bats warm-up prior maximal swing
MEASUREMENT OF BREAST MOTION ACROSS THE BREAST SURFACE LEADS TO BETTER RECOMMENDATIONS FOR BREAST SUPPORT
Get PDFQuantifying multiplanar range of motion (ROM) of multiple markers positioned on the breast surface may improve methodologies in breast biomechanics and inform bra design. Nineteen markers were positioned on the breast of 24 females. During running, the nipple marker underwent the greatest ROM of all markers on the breast. Significant differences were reported in multiplanar ROM between the nipple marker and 17 markers within the breast marker array. Furthermore, the distribution of multiplanar ROM differed across the 19 markers positioned on the breast, with the most dominant direction reported as superioinferior. It was proposed that the nipple marker is a good representative of breast motion; however the marker array may provide a more holistic approach to informing sports bra design
INFLUENCE OF A FULL BODY COMPRESSION SUIT ON TRUNK CONTROL DURING CUTTING MANEUVERS
Get PDFThe purpose of this study was to evaluate the influence of a full body compression suit on trunk control and knee joint moments during cutting maneuvers. Female athletes performed unanticipated cuttings with and without the tested apparel, while 3D kinematics and ground reaction forces were measured. Higher trunk lateral flexion was measured while wearing the compression suit (p < 0.001), whereas knee joint moments were not significantly different between the two conditions. It seems that participants relied on the compression suit to support their trunk, but as the apparel failed to limit the trunk range of motion, subjects had a higher trunk lateral flexion. However this trunk position was not associated with increased knee joint loading during cutting maneuvers