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2018

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Articles 4831 - 4860 of 62017

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The Effects Of Focus Of Attention On The Learning Of The Clean Weightlifting Technique In Novices, Adrian R. Rivadulla, Tim J. Lawrenson, Ezio Preatoni Nov 2018

The Effects Of Focus Of Attention On The Learning Of The Clean Weightlifting Technique In Novices, Adrian R. Rivadulla, Tim J. Lawrenson, Ezio Preatoni

ISBS Proceedings Archive

The purpose of this study was to assess the effects of different focus of attention (FOA) feedback on the learning of the clean weightlifting technique. Sixteen participants naive to the task were divided into two groups (external and internal FOA) and attended three sessions of learning. Bar and lifter kinematics were measured prior to and after learning, and retention and transfer tests were performed seven days after protocol completion. Internal FOA feedback promoted greater reduction of the distance between the bar and the lifter’s body, whereas both types of feedback were found to be equally effective at modifying hip, knee …

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New Developments In Vector Coding Methods For Assessing Coordination Variability, Holly A. Stock, Laura-Anne M. Furlong, Cassie Wilson, Richard E.A. Van Emmerik, Ezio Preatoni Nov 2018

New Developments In Vector Coding Methods For Assessing Coordination Variability, Holly A. Stock, Laura-Anne M. Furlong, Cassie Wilson, Richard E.A. Van Emmerik, Ezio Preatoni

ISBS Proceedings Archive

The purpose of this study is to propose modifications to current methods for the assessment of coordination variability through vector coding techniques. Commonly, vector coding starts from calculating the vector difference between adjacent data points on an angle-angle plot. This initial stage is analogue to estimating angular velocities from displacement, but with the limitation of differentiating the three axial components in isolation. Instead, the calculation of angular velocities from 3D data should take into account movement in other planes of motion. This study suggests the use of angular velocities in vector coding in place of the difference calculations and demonstrates …

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Establishing A Method To Determine Impact Force In Tennis With Different String Tensions – A Preliminary Study, Ian Harris Sujae, Syahrial Bakhtiar, Shige Kudo, Wan Rizal Wan Zakaria, Alex Ong Dr, Joseph Hamill Nov 2018

Establishing A Method To Determine Impact Force In Tennis With Different String Tensions – A Preliminary Study, Ian Harris Sujae, Syahrial Bakhtiar, Shige Kudo, Wan Rizal Wan Zakaria, Alex Ong Dr, Joseph Hamill

ISBS Proceedings Archive

The purpose of this study was to establish a method to estimate impact force in tennis forehand stroke to determine if differences in string tension would affect impact force. This is a preliminary study using only one participant. Estimates were determined using kinematic data and data obtained from strain gauges. Preliminary data on peak resultant impact force estimates were within the range of those reported in the literature. Peak resultant force estimates were larger for higher string tension rackets and lower string tension in the racquets possibly due to differences in coefficient of restitution. Data estimated from this study, regardless …

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The Relationship Between Dry-Land Resistance Training And Start Performance In Competitive Swimming: A Brief Review, Shiqi Thng, Simon Pearson, Justin Keogh Nov 2018

The Relationship Between Dry-Land Resistance Training And Start Performance In Competitive Swimming: A Brief Review, Shiqi Thng, Simon Pearson, Justin Keogh

ISBS Proceedings Archive

The purpose of this study was to review the literature on the relationship between dry-land resistance training and swim start performance in competitive swimming. It is common practice in competitive swimming to use dry-land resistance training to increase muscular strength and power. Given the explosive nature of the swim start, it would appear that high levels of lower body muscular strength and power are necessary to enhance this component in swimming. Performance in total body jumping exercises shared a stronger relationship to start performance than single joint exercises. This may reflect the requirement for force and power to be developed …

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The Application Of Fourier Analysis To Demonstrate The Impact Of The Flutter Kick On Longitudinal Rotation In Front Crawl, Jordan Andersen, Peter Sinclair, Carla Mccabe, Ross Sanders Nov 2018

The Application Of Fourier Analysis To Demonstrate The Impact Of The Flutter Kick On Longitudinal Rotation In Front Crawl, Jordan Andersen, Peter Sinclair, Carla Mccabe, Ross Sanders

ISBS Proceedings Archive

The contribution of the flutter kick to front crawl performance from its influence on longitudinal body rotation has not been thoroughly investigated. Fourier analysis was used to examine the impact of the kick on segmental and whole body angular momentum about the body’s longitudinal axis in fourteen elite front crawl specialists swimming at sprint and 400m pace. The third harmonic frequency, representing the effects of the six-beat flutter kick, was greater at sprint than 400m pace in lower limb, upper limb, and whole body angular momentum. The presence of the third harmonic in upper limb and whole body angular momentum …

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The Effect Of A Novel Rehabilitation Program On Walking Performance In Persons With Multiple Sclerosis, Alyssa J. Rebensburg, Olivia D. Perrin, Ine Mylle, Cathy Ruprecht, Lynn Vanwelsenaers, Kim Spranger, Randall L. Jensen, Sarah Breen Nov 2018

The Effect Of A Novel Rehabilitation Program On Walking Performance In Persons With Multiple Sclerosis, Alyssa J. Rebensburg, Olivia D. Perrin, Ine Mylle, Cathy Ruprecht, Lynn Vanwelsenaers, Kim Spranger, Randall L. Jensen, Sarah Breen

ISBS Proceedings Archive

The current study examined the effects of the NewGait™ device on walking performance in persons with multiple sclerosis (MS). Eight MS patients participated in this study. Pre- and post-testing assessed kinematic gait variables (step width, length, and speed), ankle range of motion, and rating of perceived exertion (RPE). Participants completed an 8-week physical therapy (PT) protocol aimed to improve gait and balance, with the experimental group wearing the NewGait™ device. Repeated measures mixed ANOVA showed no main effects between the gait variables or between groups. Post-hoc paired t-tests indicated that the NewGait™ device elicited meaningful change in …

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Long Term Effects Of A Wearable Neuromuscular Device On Modifiable Risk Factors Associated With Acl Injuries In Female Collegiate Athletes During A Countermovement Jump, Sydney A. Dreves Nov 2018

Long Term Effects Of A Wearable Neuromuscular Device On Modifiable Risk Factors Associated With Acl Injuries In Female Collegiate Athletes During A Countermovement Jump, Sydney A. Dreves

ISBS Proceedings Archive

The purpose of this study was to determine if a wearable neuromuscular device (WND) was successful in reducing knee valgus angle (VA), and increasing electromyography (EMG) activity of the gluteus maximus (Gmax), gluteus medius (GMed), medial hamstrings (junction of the semimembranosis and semitendinosis), and vastus medialis oblique (VMO) in female collegiate soccer players during a countermovement jump (CMJ). 15 female soccer players, were recruited to partake in a 6 week study. Over the intervention period, the intervention group (n=8) wore a WND, during active rest. It was hypothesized that the WND group would display a decreased VA and increase in …

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Aerodynamic Effects Of A Panel Orientation In Volleyball Float Serve, Sungchan Hong, Byung Mook Weon, Yasumi Nakanishi, Kaoru Kimachi, Kazuya Seo, Takeshi Asai Nov 2018

Aerodynamic Effects Of A Panel Orientation In Volleyball Float Serve, Sungchan Hong, Byung Mook Weon, Yasumi Nakanishi, Kaoru Kimachi, Kazuya Seo, Takeshi Asai

ISBS Proceedings Archive

The purpose of this study was to clarify the aerodynamic and trajectory characteristics on four type volleyballs using the wind tunnel experiments and a hitting robot. We confirmed, in particular, that the critical Reynolds number (Recr) changed depending on the ball types and panel orientations. Recr for Mizuno ball (conventional) was determined to be ~2.8 × 105 (Drag coefficient; Cd = 0.16) on panel orientation A and ∼2.0 × 105 (Cd = 0.20) on panel orientation B. On the other hand, Recr for Mikasa ball (Olympic Official) was ∼2.9 × 105 …

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The Influence Of Knee Joint Flexion-Extension On Wrist Joint Speed In Cricket Fast Bowlers, Kane Middleton, Jacqueline Alderson, Bruce Elliott, Peter Mills Nov 2018

The Influence Of Knee Joint Flexion-Extension On Wrist Joint Speed In Cricket Fast Bowlers, Kane Middleton, Jacqueline Alderson, Bruce Elliott, Peter Mills

ISBS Proceedings Archive

The purpose of this study was to assess the sensitivity of wrist joint velocity to manipulations of knee joint flexion–extension kinematic waveforms through the use of a forward kinematic approach. The bowling kinematics of twelve male cricket pace bowlers were entered into a forward kinematic model using MATLAB software. The participants‘ knee joint flexion-extension kinematics were manipulated in two ways: 1) offset by ± 20° and 2) amplified by a factor of ± 2. Both manipulations led to increases in resultant wrist joint velocity at the time of ball release. An offset of 20° extension increased wrist joint velocity by …

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Late Swing Knee Mechanics In Elite Rugby Union Players And Trained Sprinters, Claire Kenneally-Dabrowski, Nicholas A.T. Brown, Adrian Lai, Diana Perriman, Benjamin Serpell, Wayne Spratford Nov 2018

Late Swing Knee Mechanics In Elite Rugby Union Players And Trained Sprinters, Claire Kenneally-Dabrowski, Nicholas A.T. Brown, Adrian Lai, Diana Perriman, Benjamin Serpell, Wayne Spratford

ISBS Proceedings Archive

Hamstring injuries are highly prevalent in running-based sports such as sprinting and rugby union, and are thought to occur during the late swing phase where the hamstrings are under great load and strain. The aim of this study was to investigate the knee mechanics of elite rugby players and speed-matched sprinters during the late swing phase of maximum effort over-ground running. Elite rugby players demonstrated reduced knee extension velocity through late swing, which was associated with a smaller maximum knee flexion angle during the mid-swing phase. As rugby players displayed a greater absolute knee flexion moment, power absorption and negative …

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Tai Chi Increased Body Stability Among The Elderly Under The Dual Task Condition During Stair Ascent, Qipeng Song, Dewei Mao Nov 2018

Tai Chi Increased Body Stability Among The Elderly Under The Dual Task Condition During Stair Ascent, Qipeng Song, Dewei Mao

ISBS Proceedings Archive

Our work aimed to find out whether Tai Chi (TC) exercise could improve body stability among the elderly under a physical-cognitive dual task (DT) condition during stair ascent. 15 elderly persons who regularly exercised TC and 15 no exercise (NE) participants were asked to walk ascending stairs under single task (ST) and DT conditions in this study. The results showed the TC group had a lower lateral impulse and center of mass-center of pressure (COM-COP) ap/ml separation under the DT condition; Compared with the ST condition, the TC group increased foot clearance, the NE group increased their lateral impulse and …

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Examining The Relability And Validity Of The Fitbit Charge 2™ Technology On Heart Rate During Treadmill Exercise, Mahalie Hargis, Robert O. Powell, Suzanne M. Konz Nov 2018

Examining The Relability And Validity Of The Fitbit Charge 2™ Technology On Heart Rate During Treadmill Exercise, Mahalie Hargis, Robert O. Powell, Suzanne M. Konz

ISBS Proceedings Archive

The purpose of this study was to determine the reliability and validity of the Fitbit® Charge 2™ compared to a 4-lead ECG to monitor heart rate during exercise. All participants completed a VO2Max test to determine the participants’ cardiorespiratory fitness and appropriate work loads for the intensity protocol. Participants wore a Fitbit® Charge 2™ on the wrist and a 4-lead ECG. 16 participants were assigned to testing conditions: GPS stride length/manual stride length and hold/no-hold on the handrails of the treadmill. The participants completed a walking protocol including light (60% of HRR) intensities while wearing both devices. Intraclass …

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Ischemic Preconditioning Blunts Eccentric Exercise-Induced Muscle Damage Due To Reduced Oxidative Stress?, Jan-Frieder Harmsen, Alexander Franz, Michael Behringer, Bjoern Braunstein, Robert Rein, Christoph Zilkens Nov 2018

Ischemic Preconditioning Blunts Eccentric Exercise-Induced Muscle Damage Due To Reduced Oxidative Stress?, Jan-Frieder Harmsen, Alexander Franz, Michael Behringer, Bjoern Braunstein, Robert Rein, Christoph Zilkens

ISBS Proceedings Archive

The purpose of this study was to investigate if ischemic preconditioning (IPC) prior to eccentric exercise of the elbow flexors leads to alterations in muscle oxygen saturation (SmO2) during loading. Additionally, parameters of muscle damage, like serum creatine kinase, were assessed following the loading protocol. Nineteen untrained males were allocated into two groups: (1) performing IPC prior to eccentric exercise (IPC+ECC; n=10) and (2) performing eccentric exercise only (n=9). Muscle damage parameters were significantly lower in IPC+ECC (p2 during eccentric loading (ischemia) as well as the subsequent increase of SmO2 (reperfusion) were lower in IPC+ECC (p

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Lower Leg Morphology And Stretch-Shortening Cycle Performance In Young And Elderly Males, Jeffrey M. Mcbride, Paige E. Rice, Alan R. Needle, Zachary S. Leicht, Kevin A. Zwetsloot Nov 2018

Lower Leg Morphology And Stretch-Shortening Cycle Performance In Young And Elderly Males, Jeffrey M. Mcbride, Paige E. Rice, Alan R. Needle, Zachary S. Leicht, Kevin A. Zwetsloot

ISBS Proceedings Archive

The purpose of this investigation was to examine bone and muscle characteristics of the lower leg and stretch-shortening cycle capabilities of the ankle in young (22.3 ± 1.3 yrs) and elderly (67.5 ± 3.3 yrs) males. Peripheral quantitiative computed tomography (pQCT) was utilized to assess bone stress-strain index, bone ultimate fracture load, muscle density, muscle cross-sectional area (CSA), fat CSA and muscle+bone CSA. Maximal voluntary isometric plantarflexion (MVIP) force and force-velocity measurments during a countermovement hop (CMH) and drop hops from 20, 30 and 40 cm (DH20, DH30, DH40) were also measured. Bone stress-strain index was significantly higher in young …

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Biomechanical Relationship Between The Goalkeeper’S Motions And The Kicker’S Motions In Soccer, Naoki Numazu, Norihisa Fujii Nov 2018

Biomechanical Relationship Between The Goalkeeper’S Motions And The Kicker’S Motions In Soccer, Naoki Numazu, Norihisa Fujii

ISBS Proceedings Archive

The purposes of the study were (1) to identify the relationship between kicking motion of kickers and diving motions of goal keepers (GKs), and (2) to investigate the knowledge which can anticipate the moving direction after the preparatory motion from the kicking motion. Fourteen collegiate male GKs and 11 collegiate outfield players participated in this study. The mimic real shooting situation was captured with motion capture systems. The primary findings were: Regardless of the shot direction (rightward and leftward), the motion timing of preparatory motion is similar. The GKs started jumping at the same time as grounding of kicker’s support …

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How Lower Body Segment Rotations Contribute To The Upward Foot Velocity In Soccer Volley Kicking, Shusei Sugi Nov 2018

How Lower Body Segment Rotations Contribute To The Upward Foot Velocity In Soccer Volley Kicking, Shusei Sugi

ISBS Proceedings Archive

We aimed to quantify the contribution of lower body rotations in producing upward foot velocity during soccer volley kicking. The kicking motions at various ball heights were captured from fifteen male university soccer players using an optical motion capture system at 500 Hz. The effectiveness of lower body rotations in producing upward foot centre of gravity velocity were computed (Sprigings et al., 1994) and time integrated. Major contributors to generating the upward foot CG velocity in volley kicking were 1) knee flection, 2) hip internal rotation, 3) pelvis clock-wise rotation within the frontal plane and 4) hip flection. The contributions …

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Kinetic Adjustments Of Submaximal Soccer Instep Kicking, Hiroyuki Nunome, Koichiro Inoue, Kohei Watanabe, Takahito Iga, Hiroshi Akima, Kevin Ball Nov 2018

Kinetic Adjustments Of Submaximal Soccer Instep Kicking, Hiroyuki Nunome, Koichiro Inoue, Kohei Watanabe, Takahito Iga, Hiroshi Akima, Kevin Ball

ISBS Proceedings Archive

We aimed to demonstrate segmental dynamics during submaximal effort of soccer instep kicking. Eight male university level soccer players volunteered. Their kicking motions at 50, 75 and 100 % effort levels were captured at 500 Hz and the resultant ball velocities were monitored simultaneously using a pair of photocells. Apparent kinetic adjustments (angular impulses due to resultant joint and interaction moments) were clearly identified in both proximal and distal segments in response to the three target effort levels, thereby supporting the interpretation that the velocity of the distal end of the leg (foot) is controlled in a context of a …

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Changes In Body Position On The Bike During Sprint Cycling: Applications To Bike Fitting, Luke Daly, Rodrigo Bini, Michael Kingsley Nov 2018

Changes In Body Position On The Bike During Sprint Cycling: Applications To Bike Fitting, Luke Daly, Rodrigo Bini, Michael Kingsley

ISBS Proceedings Archive

This study compared hip flexion angles during sprint cycling with those during sub maximal cycling performed using a range of handlebar positions (changing height and reach). Eleven competitive cyclists were assessed in two sessions. The first session involved determining handlebar positions that resulted in a range of pre-determined hip flexion angle (70-110°) during sub maximal cycling. In the second session, cyclists performed 2 x 6-s sprints at the handlebar positions determined during the first session. Xsens motion tracking system was used to measure hip flexion angles during sprints completed with the handlebar positions determined during the first session. Differences between …

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Influence Of The Golf Club On The Swing Motion, Tomohiro Imai, Shoichiro Takehara Nov 2018

Influence Of The Golf Club On The Swing Motion, Tomohiro Imai, Shoichiro Takehara

ISBS Proceedings Archive

This study analyzed the influence of the golf club on the swing motion. An experiment was carried out using three 7-irons of different mass and shaft stiffness. Performance was recorded with 10 motion capture cameras, psychological evaluation was evaluated by questionnaire, and the ballistic was measured with a golf ballistic measuring instrument. We analyzed position in the vertical direction of a right wrist marker and considered the flow of the swing motion. We calculated the standard deviation to analyze difference in the swing motion. Comparing the standard deviation, the ballistic measurement results and psychological evaluation, standard deviations could be used …

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The Effects Of Core Stability Training On The Functional Movement Screen And Postural Stability In Collegiate Students, Lung-Ching Liang, Yen-Ting Wang, Alex J.Y. Lee Nov 2018

The Effects Of Core Stability Training On The Functional Movement Screen And Postural Stability In Collegiate Students, Lung-Ching Liang, Yen-Ting Wang, Alex J.Y. Lee

ISBS Proceedings Archive

This study evaluated effects of core stability training (CST) on the functional movement screen (FMS) and postural stability (PS) in healthy young collegiate students. 28 healthy collegiate female students were assigned to an experimental (CST exercises twice a week for six weeks) or control group (equal time of warm-up and stretching exercises only). The CST combined Pilates and Swiss ball exercise for fifty minutes, twice per week, for six weeks. FMS scores were evaluated by a certified professional. The PS was evaluated by the 8-direction limits of stability (LOS) test using the Biodex Balance System. Repeated measures analyses of variance …

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Motion Of Centre Of Pressure During Standing On Tip Toe On One Leg: Association With Forefoot Shape Of Classic Ballet Dancers, Akiko Imura, Hiroyuki Nagaki, Takuya Goto, Takahiro Higuchi Nov 2018

Motion Of Centre Of Pressure During Standing On Tip Toe On One Leg: Association With Forefoot Shape Of Classic Ballet Dancers, Akiko Imura, Hiroyuki Nagaki, Takuya Goto, Takahiro Higuchi

ISBS Proceedings Archive

This study clarified how the centre of pressure (COP) is kept in the forefoot area during standing on tip toe on one leg by classical ballet dancers. During standing on tip toe on one leg with ballet shoes, the weight is distributed around the first and second toes and at the distal point of the second metatarsal bone ideally. Thus, the supporting surface during standing on tip toe on one leg would be affected by alignment of the metatarsal bones. Motions of the COP during standing on tip toe on one leg were investigated for ten female recreational dancers and …

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Relationships Between Grip Strength Tests In Male Strength Sport Athletes, Justin Wl Keogh, Andrew Burge, Kristen Wright Nov 2018

Relationships Between Grip Strength Tests In Male Strength Sport Athletes, Justin Wl Keogh, Andrew Burge, Kristen Wright

ISBS Proceedings Archive

The purpose of this study was to examine the relationships between a number of common grip strength tests in strength sport athletes. Thirty-four male athletes competing in weightlifting, powerlifting or strongman were assessed for their maximum performance in the handgrip dynamometer, pinch grip and revolving thick bar grip strength tests. Correlations between the three strength test were: handgrip and pinch grip (r = 0.40), handgrip and revolving thick bar (r = 0.66) and pinch grip and revolving thick bar (r = -0.03). These varying relationships between the three strength tests suggest a relative specificity of strength test …

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Kinematic Analysis Of The Start For World-Class Single Luge Athletes, Takahisa Oguchi, Masahiro Yuki, Michiyoshi Ae Nov 2018

Kinematic Analysis Of The Start For World-Class Single Luge Athletes, Takahisa Oguchi, Masahiro Yuki, Michiyoshi Ae

ISBS Proceedings Archive

The purpose of this study was to kinematically analyse the luge start motion for world-class single luge athlete at an official competition. Thirteen male luge athletes were videotaped and analysed with the three-dimensional DLT method at the World Luge Championship. Athletes were assigned to two groups (fast or slow) based on their early start time. At the start bar release, the fast group showed significantly larger system CG velocity (4.3 ± 0.1 m/s, p < 0.05) than the slow group. The backward system CG velocity of the fast group tended to be larger (-2.8 ± 0.2 m/s vs. -2.6 ± 0.3 m/s, ES = 0.80), and the athletes of the fast group rotated the arms move medially and extended the elbow joint more than the slow group.

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Braking Forces During Bicycle Pedaling: An Examination Of The Full Crank Rotation, Yuta Yamaguchi, Kohei Watanabe, Kenji Oishi, Wataru Fukuda, Tetsunari Nishiyama Nov 2018

Braking Forces During Bicycle Pedaling: An Examination Of The Full Crank Rotation, Yuta Yamaguchi, Kohei Watanabe, Kenji Oishi, Wataru Fukuda, Tetsunari Nishiyama

ISBS Proceedings Archive

Pedalling skills are evaluated using angular impluse of negative crank torque (INCT) that occurs in pulling phase (180-360° of crank rotation that 0° is top dead center. INCT has the effect of inhibit crank rotation (“braking force“). The aim of study was to obtain findings to reduce INCT for improving cyclists' pedalling skills. We examined the relationship between INCT and kinetic pedalling data through the full crank rotation. Fifteen male cyclists performed constant pedalling at 80%Vo2max and 90rpm. Kinetic and kinematic pedalling data were measured by the pedal-shaped force platform (KISTLER) and by …

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Center Of Mass Displacement During The 
Badminton-Specific Speed Test, Uwe G. Kersting, Roos Bulthuis, Filip G. Lysdal, Christian M. Madsen Nov 2018

Center Of Mass Displacement During The 
Badminton-Specific Speed Test, Uwe G. Kersting, Roos Bulthuis, Filip G. Lysdal, Christian M. Madsen

ISBS Proceedings Archive

The purpose of this study was to identify movement strategies of elite badminton players when carrying out a badminton specific speed test. Twenty-one international elite badminton players participated with whole-body kinematics collected using 15 high-speed infrared cameras. Center of Mass (CoM) movement analysis was conducted using Visual3D (C-Motion Inc., USA). CoM energy and total power, peak CoM velocity and postural sway were analysed. Genders were compared by t-tests and relationship between completion time and the investigated parameters was tested using Pearson Correlation tests. Male players were lowering their CoM 7 cm more than females. A significant correlation was found among …

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Effects Of Walking Versus Completing A Neurocognitive Task, On End-Tidal Carbon Dioxide After Concussion – A Pilot Study, Patrick Siedlecki, Paolo Sanzo, Carlos Zerpa, Ian Newhouse Nov 2018

Effects Of Walking Versus Completing A Neurocognitive Task, On End-Tidal Carbon Dioxide After Concussion – A Pilot Study, Patrick Siedlecki, Paolo Sanzo, Carlos Zerpa, Ian Newhouse

ISBS Proceedings Archive

This study examined differences between healthy and concussed participants when performing a neuropsychological and physical task on measures of end-tidal carbon dioxide (ETCO2). Twenty-two participants (17 healthy; 5 concussed) completed the Immediate Post-Concussion Assessment and Cognitive Test (ImPACT) battery and walked on a treadmill at two walking speeds. A CapnoTrainer© measured ETCO2 during the tasks. Statistically significant main effects were observed for task (F(1,20)=5.332, p<0.032; F(2,38)=52.305, p<0.001) and group (F(1,20)=14.388, p<0.001; F(1,19)=8.283, p<0.01) in ETCO2 during the cognitive and physical tasks, respectively. Abnormal ETCO2 levels …

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Reliability Of The Long-Range Correlations Obtained From Detrended Fluctuation Analysis Of Running Stride Intervals, Joel T. Fuller, Jonathan Buckley, Margarita Tsiros, Dominic Thewlis Nov 2018

Reliability Of The Long-Range Correlations Obtained From Detrended Fluctuation Analysis Of Running Stride Intervals, Joel T. Fuller, Jonathan Buckley, Margarita Tsiros, Dominic Thewlis

ISBS Proceedings Archive

Monitoring stride interval long-range correlations has been suggested as a method for coaches and clinicians to track changes in fatigue and injury risk. This study investigated the between-day reliability of stride interval long-range correlations during treadmill running. Stride interval long-range correlations were assessed on two occasions 1-week apart using detrended fluctuation analysis during 6 minutes of running at 11, 13 and 15 km·h-1. Stride interval long-range correlations demonstrated good absolute reliability (95% limits of agreement: 0.11-0.14 arbitrary units) and relative reliability (intraclass correlation coefficient: 0.74-0.87) at each running speed. The absolute reliability values reported in this study can …

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The Validity Of Using Virtual Reality Head-Mounted Display For Agility Training, Man Kit Lei, Kuangyou B. Cheng, Yu-Chi Lee Nov 2018

The Validity Of Using Virtual Reality Head-Mounted Display For Agility Training, Man Kit Lei, Kuangyou B. Cheng, Yu-Chi Lee

ISBS Proceedings Archive

Virtual reality (VR) provides a fully controlled environment with the potential of making sports training easier. However, to date very few studies concerned creating a locomotion training environment enabling multi-directional movements for mimicking realistic locomotion. This study aims to investigate the validity of using low-cost VR head-mounted display (HMD) for agility training in a virtual environment (VE) for ‘real-walking’ locomotion. Three male college participants (age: 24.00±1.00years, height: 1.68±0.09m, weight: 65.63±4.65kg) participated in this study. They were asked to complete two agility ladder training tasks: the forward and backward icky shuffle, in the real environment (RE) and VE. The correlations of …

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Analysis Of Skier Kinetics During The Start And Kinematics Over The First Features During A Ski Cross Run, Matteo Aita, Uwe G. Kersting Nov 2018

Analysis Of Skier Kinetics During The Start And Kinematics Over The First Features During A Ski Cross Run, Matteo Aita, Uwe G. Kersting

ISBS Proceedings Archive

The aim of this study was to analyse the start and the skiing technique in Ski Cross, and relate them to the performance. The project consisted of two parts: an indoor test was conducted to relate the impulse applied by the skiers on the start handles to their velocity at handle release. Further, an outdoor test was conducted to study the skiers’ kinematics over the first features of a Ski Cross run, and relate it to completion time of the first section (~30 m). Five athletes from the Swedish National Team were tested on several occasions using an instrumented start …

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Using Underwater 3d Kinematics To Improve The Paralympic Swimming Classification System, Brendan Burkett, Luke Hogarth, Peter Van De Vliet, Carl J. Payton Nov 2018

Using Underwater 3d Kinematics To Improve The Paralympic Swimming Classification System, Brendan Burkett, Luke Hogarth, Peter Van De Vliet, Carl J. Payton

ISBS Proceedings Archive

Swimming is a fundamental sport at the Olympic and Paralympic games, with the Paralympic classification system being the key difference between these games. To improve the accuracy of the classification system this case study investigated differences in the underwater hand kinematics of the affected and unaffected limb of an elite Para swimmer with hemiplegic cerebral palsy. In this case study, hemiplegic cerebral palsy caused impairments in strength, motor coordination and range of motion that affected hand speeds and trajectory paths during the underwater stroke phases. This work illustrates the benefit of using objective impairment and sport-specific measurements to gain insights …

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