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The Development Of An Imu Based Measurement System For The Determination Of The Subtalar Joint Axis, Anja Seeger, Wilfried Alt Jul 2024

The Development Of An Imu Based Measurement System For The Determination Of The Subtalar Joint Axis, Anja Seeger, Wilfried Alt

ISBS Proceedings Archive

The subtalar joint axis influences biomechanical variables, especially regarding the lower limbs. The purpose of this study was to develop a measurement system for the subtalar joint axis based on inertial measurement units. Different development steps were taken, like an axis estimation algorithm using a principal component analysis and multiple approaches for the reference of the subtalar joint axis to the anatomical coordinate system. In the current development step, we try to solve the reference problem by using fused IMU data to track the offset to the foots longitudinal axis. As of now it is possible to determine the axis …

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Learning Biomechanics: Deja-Vu All Over Again, Duane Knudson Jul 2024

Learning Biomechanics: Deja-Vu All Over Again, Duane Knudson

ISBS Proceedings Archive

This article reviews the physics education research (PER) and scholarship of teaching and learning (SoTL) on introductory biomechanics. Many sport and exercise science students fear and dislike biomechanics, so faculty have shared their teaching ideas at many conferences, with a smaller number reporting research on the efficacy of these ideas. These is a large body of PER that consistently report active learning (AL) is twice as effective or more for learning Newtonian mechanics than lectures. Biomechanics scholars have followed this work with specialized standardized tests, finding similar benefits of AL for all students in-person and in online instruction. SoTL research …

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Spring-Mass Model Symmetry Characteristics In Distance Runners Across A Competitive Season, Isabella Vargas-Blanchard, Riley Schemel, Alexis M. Arena, Monique Mokha Jul 2024

Spring-Mass Model Symmetry Characteristics In Distance Runners Across A Competitive Season, Isabella Vargas-Blanchard, Riley Schemel, Alexis M. Arena, Monique Mokha

ISBS Proceedings Archive

This study aimed to apply characteristics of the spring-mass model (SMM) to distance running over a competitive season by measuring changes in landing-takeoff and rebound asymmetries. Thirteen runners from the same university team underwent 3D biomechanical gait analyses at the start and end of a 7-week competitive season. Paired-sample t-tests compared landing-take-off asymmetry [effective contact time (tce) to aerial time (tae)], rebound asymmetry [positive work time (tpush), to negative work time (tbrake), and average vertical ground reaction force (vGRF). Rebound asymmetry increased by 4%, but was not significant, t(12)=-1.239, p=0.239. Landing-take-off …

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Influence Of Advanced Footwear Technology On Performance And Biomechanics During Mountain Running, Pedro Corbí-Santamaría, José Vicente García-Tormo, Alba Herrero-Molleda, Marina Gil Calvo, Miguel Corbí-Santamaría, Gabriel Protzen, Daniel Boullosa, Juan Garcia-Lopez Jul 2024

Influence Of Advanced Footwear Technology On Performance And Biomechanics During Mountain Running, Pedro Corbí-Santamaría, José Vicente García-Tormo, Alba Herrero-Molleda, Marina Gil Calvo, Miguel Corbí-Santamaría, Gabriel Protzen, Daniel Boullosa, Juan Garcia-Lopez

ISBS Proceedings Archive

The purpose of this study was to evaluate the effect of the advanced footwear technology (AFT) on performance and biomechanics during mountain running. Twelve male mountain-runners performed two running time-trials over a 5.19 km mountain circuit (1.68 km uphill, 1.56 km downhill and 1.95 km mixed) using conventional (CON) and carbon fibre plate shoes (CFP) in a randomized order (i.e., CON-CPF and CFP-CON). Total time, heart rate, RPE and biomechanical variables were registered. The AFT did not affect performance, heart rate, RPE and running power, but increased contact time and step length, decreasing step frequency in the order CON-CFP, mainly …

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Standing Long Jump Power Estimation From Smartphone Imus, Beatrice De Lazzari, Giuseppe Vannozzi, Valentina Camomilla Jul 2024

Standing Long Jump Power Estimation From Smartphone Imus, Beatrice De Lazzari, Giuseppe Vannozzi, Valentina Camomilla

ISBS Proceedings Archive

The purpose of this study was to provide athletes/coaches with an easy-to-implement estimate of the power of standing long jump (SLJ), recognized as an indicator of the ability of lower limbs of exert power. To this aim, inertial sensors embedded in smartphones were used. A sample group of 150 trained young participants was recruited and asked to perform the SLJ task while holding the smartphone. A set of features was identified, based on biomechanical knowledge and literature, and then selected through Lasso regression to be feed as input of three different optimized machine learning architectures to estimate the SLJ power. …

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Saddle Perceived Comfort Of Competitive Women Road Cyclists, Alba Herrero-Molleda, Rodrigo Bini, Juan Garcia-Lopez Jul 2024

Saddle Perceived Comfort Of Competitive Women Road Cyclists, Alba Herrero-Molleda, Rodrigo Bini, Juan Garcia-Lopez

ISBS Proceedings Archive

The purpose of this study was to identify which are the most used saddle types by competitive women cyclists and their effect on perceived comfort. A comfort questionnaire was completed by 60 elite women cyclists that competed in the Road Cycling Cup, and a picture of their saddle was taken. The participants saddles were classified according to their design (i.e., women, men, and unisex saddles) and their dimensions were also obtained. Women road cyclists find women’s saddles more comfortable than men’s ones, being the women’s saddle the type most used by the participants. However, experienced cyclists use men’s saddles. In …

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Distal Joint Kinetics Are Associated With Shot Put Performance, Shogo Hashimoto, Tempei Tominaga, Keigo Ohyama Byun, Natsuki Sado Jul 2024

Distal Joint Kinetics Are Associated With Shot Put Performance, Shogo Hashimoto, Tempei Tominaga, Keigo Ohyama Byun, Natsuki Sado

ISBS Proceedings Archive

Shot put motion exhibits upper-limb “push type proximal-to-distal sequence”, which is a common motor task with the lower limb. In the lower limb, proximal muscle function is associated with motor performance. Here we show the strong correlation of the wrist torque and power with the flight distance in the motion of 13 male shot putters. For the shoulder, only the peak torque correlated with the flight distance, whereas for the elbow, flexion torque was exerted, and both torque and power did not correlate with the flight distance. We suggest that it is important for shot putters to strengthen both the …

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Alterations In Muscle Synergies In Patients With Knee Osteoarthritis During Level- And Downhill Walking, Lasse Hansen, Jana Rogoschin, Igor Komnik, Wolfgang Potthast Jul 2024

Alterations In Muscle Synergies In Patients With Knee Osteoarthritis During Level- And Downhill Walking, Lasse Hansen, Jana Rogoschin, Igor Komnik, Wolfgang Potthast

ISBS Proceedings Archive

In this study, the effects of knee osteoarthritis (KOA) on muscle synergy composition during locomotion tasks were investigated. Utilizing non-negative matrix factorization on surface electromyography data from 37 participants, analyses of muscle synergies in both level walking and ramp descent in KOA patients and age-matched controls were conducted. It could be shown that KOA affects muscle synergies in the affected limb during level walking, where a merge of synergies during late swing and early stance phases is observed. A similar effect was observed in ramp descent for the affected and unaffected limb. In this study, the impact of KOA on …

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Predictive Modeling Of Knee Anterior Shear Forces Using Inertial Measurement Unit Data And Machine Learning, Sean A. Brown, Taliah Carlson, Lauren Dami, Joshua T. Weinhandl Jul 2024

Predictive Modeling Of Knee Anterior Shear Forces Using Inertial Measurement Unit Data And Machine Learning, Sean A. Brown, Taliah Carlson, Lauren Dami, Joshua T. Weinhandl

ISBS Proceedings Archive

This study presents a non-invasive approach using machine learning to predict proximal tibial anterior shear force (ASF), a surrogate for anterior cruciate ligament (ACL) loads from inertial measurement unit (IMU) data, providing a practical alternative to direct force measurement. Employing XGBoost, the research analysed IMU data from drop jump tasks performed by 22 female participants and validated on an additional participant. The model underwent optimization through feature reduction and signal filtering. The results demonstrate an XGBoost model using IMU data to estimate ASF showed improved prediction accuracy after feature reduction and a low-pass filter. The model was able to predict …

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The Energy Transferred Between Lower-Body Segments By Successful And Less Successful Male Rugby Place Kickers, Alexandra C. Atack, Grant Trewartha, Neil Bezodis Jul 2024

The Energy Transferred Between Lower-Body Segments By Successful And Less Successful Male Rugby Place Kickers, Alexandra C. Atack, Grant Trewartha, Neil Bezodis

ISBS Proceedings Archive

The purpose of this study was to understand how energy is transferred during a rugby place kick and how it differs between successful and less successful kickers. Senior male kickers (n=33) performed maximal range place kicks which were analysed using 3D motion capture (240 Hz), enabling segment powers to be determined. Energy was transferred out of the support leg throughout the backswing and early downswing, adding to the energy at the pelvis, which was subsequently transferred out as the kick knee extended towards the ball. Kickers who were limited by range, transferred less energy out of the support leg and …

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Examining The Impact Of Approach And Exit Phase Strategies On Change Of Direction Performance: A Novel Methodology, Hamish G. Bull, Alexandra C. Atack, Grant Trewartha, Benjamin Priddle, Samuel J. Callaghan Jul 2024

Examining The Impact Of Approach And Exit Phase Strategies On Change Of Direction Performance: A Novel Methodology, Hamish G. Bull, Alexandra C. Atack, Grant Trewartha, Benjamin Priddle, Samuel J. Callaghan

ISBS Proceedings Archive

This study used new insole pressure technology to examine how movement strategies during approach and exit phases affect change of direction (COD) times. Participants (n=26) wore NURVV smart insoles and performed 90˚ cuts off each leg (dominant [Dom] and non-dominant [ND]). Ground contact time (GCT), cadence, centre of pressure, and return to linear sprinting metrics were analysed for four steps about the cut-step. Faster cadence and a more forefoot strike pattern predicted 58% of the variance in Dom side COD ability. ND COD ability was predicted by a faster cadence immediately post-cut and a quicker GCT two steps before the …

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Comparisons Of Head Impacts Between Korean Youth Athletes And Non-Athletes In Soccer Headings, Euichang Kim, Young-Kwan Kim, Sukjin Choi Jul 2024

Comparisons Of Head Impacts Between Korean Youth Athletes And Non-Athletes In Soccer Headings, Euichang Kim, Young-Kwan Kim, Sukjin Choi

ISBS Proceedings Archive

The purpose of this study was to quantify the intensity and location of head impacts and compare them between high school soccer athletes and non-athletes. Twenty participants performed five goal-kick and five corner-kick soccer ball headings projected by a ball launcher machine. The head injury criterion (HIC) was calculated from the linear acceleration data from a head-attached inertial measurement unit (IMU) sensor. Results indicated there was no significant difference in HIC between the two groups. The HIC for forehead impacts was significantly lower than those for parietal contact. Coaches need to guide students to perform the forehead header in order …

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Opensim Full-Body Model For Athletes With A Running-Specific Below The Knee Prosthesis, Lukas Krämer, Marvin Zedler, Kai Heinrich, Wolfgang Potthast, Johannes Funken Jul 2024

Opensim Full-Body Model For Athletes With A Running-Specific Below The Knee Prosthesis, Lukas Krämer, Marvin Zedler, Kai Heinrich, Wolfgang Potthast, Johannes Funken

ISBS Proceedings Archive

To date, there is no comprehensive open-source tool to provide movement analysis of athletes using a running-specific prosthesis (RSP) with a below the knee amputation (BKA) to enable the calculation of corresponding inverse kinematics and dynamics. A combination of physical measurements, 2D imagery, 3D motion capture data and geometrical calculations were used to create a musculoskeletal full-body OpenSim model with subject-specific BKA structures. The model was able to reproduce athlete’s joint angles and joint moments of the lower extremities while allowing for movement comparison to non-amputee athletes. The model provides a motion analysis tool for athletes with a RSP in …

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Bicep Femoris Muscle States Prior To And During A Hamstring Strain Injury Whilst Sprinting, Kevin Wallbank, Carlie Ede, Glen Blenkinsop, Sam Allen Jul 2024

Bicep Femoris Muscle States Prior To And During A Hamstring Strain Injury Whilst Sprinting, Kevin Wallbank, Carlie Ede, Glen Blenkinsop, Sam Allen

ISBS Proceedings Archive

Kinematic and kinetic data from a maximal velocity sprint trial resulting in a hamstring strain injury was analysed using a forward dynamics musculoskeletal model solved using direct collocation (OpenSim Moco) to assess muscle fibre states of the bicep femoris long head (BFlh) muscle during the swing phase. During the injury trial, the BFlh showed greater peak fibre lengths, similar peak fibre force, velocity and power, but less negative work compared to submaximal speeds. Accumulation of muscle tissue damage from previous steps and prior submaximal sprints due to the eccentric demand on the muscle could have resulted in the BFlh failing …

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Undergraduate Students' Perceptions Of A Problem-Based Learning Biomechanics Module, Laurence Protheroe, Luciana De Martin Silva, Celeste Wilkins Jul 2024

Undergraduate Students' Perceptions Of A Problem-Based Learning Biomechanics Module, Laurence Protheroe, Luciana De Martin Silva, Celeste Wilkins

ISBS Proceedings Archive

The purpose of this study was to explore student perceptions of problem-based learning and provide recommendations for practice. Five students enrolled on a 2nd year sports biomechanics module at a UK institution participated in semi-structured focus groups at the mid- and endpoints of the module. Thematic analysis, with an inductive focus, identified themes related to successes, challenges and recommendations. Successes included intellectual development, teamwork and inclusivity. Challenges included uncertainty, engagement and retreat in intellectual development. Recommendations were integration of some traditional methods and choice of assessed problems. Educators can be confident that problem-based approaches can develop desired skills for …

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The Influence Of Noise In Angular Kinematics On The Transformation Of Linear Acceleration Between Accelerometer Coordinate Frames, Erwan Izri, Neil Bezodis, Mark Waldron, Chris Jones, Liam Kilduff, Rowan Brown Jul 2024

The Influence Of Noise In Angular Kinematics On The Transformation Of Linear Acceleration Between Accelerometer Coordinate Frames, Erwan Izri, Neil Bezodis, Mark Waldron, Chris Jones, Liam Kilduff, Rowan Brown

ISBS Proceedings Archive

Linear accelerations measured by instrumented mouthguards (iMG) are transformed to a common reference frame. To investigate the influence of signal noise on this transformation using ground truth measurements, this study transformed linear accelerations measured by an Anthropomorphic Test Device (ATD) to the iMG frame. Noise was incrementally added to ATD angular velocity signals across 81 impacts. Agreement was quantified between ATD ground truth versus noisy angular velocity, angular acceleration and transformed linear acceleration signals. Angular velocity noise as low as 0.265 rad/s led to errors exceeding 10%, highlighting the transform’s sensitivity to angular kinematics. The findings highlight potential difficulties in …

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Using Participant Descriptive Characteristics, Heart Rate And Inertial Sensors To Estimate Running Economy, Krista Vohlakari, Sailee Sansgiri, Timo Rantalainen, Esa Hynynen, Neil Cronin Jul 2024

Using Participant Descriptive Characteristics, Heart Rate And Inertial Sensors To Estimate Running Economy, Krista Vohlakari, Sailee Sansgiri, Timo Rantalainen, Esa Hynynen, Neil Cronin

ISBS Proceedings Archive

In this study, we aimed to develop a machine learning algorithm to estimate running economy. Inertial sensor, heart rate and participant descriptive characteristics were used to estimate running economy by training and comparing five different machine learning models. Fourteen subjects performed a VO2max running test on a treadmill with four-minute stages. Submaximal running speeds (lactate level < 4 mmol/l) were used to train the models. The best-performing model was a k-nearest neighbour regressor, which achieved average root mean square error of 0.097 ± 0.059 kcal/kg/km and average mean absolute percentage error of 8.7 ± 5.8 % compared to ground truth running economy data. Despite reasonably accurate running economy estimates, the model is currently not very generalisable, probably due to the small dataset used for training.

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Technical Evaluation Of The Fidelity Of The Htc Vive For Upper Limb Tracking, Matteo Mancuso Phd, Caecilia Charbonnier Dr. Jul 2024

Technical Evaluation Of The Fidelity Of The Htc Vive For Upper Limb Tracking, Matteo Mancuso Phd, Caecilia Charbonnier Dr.

ISBS Proceedings Archive

Novel tracking technologies targeting non-technical users enabled the creation of accessible motion tracking for medical functional evaluation and assisted rehabilitation. Here we describe the adaptation of the HTC Vive tracking technology toward this goal. The resulting system was then tested comparing three different anatomical calibration methods, accounting for inter-subject (1 female, 2 male) and inter-operator (2 experienced, 3 inexperienced) variability, as well as six different methods for spatial alignment with the reference measurements system. Accuracy and precision of our methods were quantified by comparison with Vicon optical tracking system. The accuracy of the anatomical landmark tracking was 2.3 ± 0.5 …

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Comparison Between Outcomes Of A Sprint Test On A Wheelchair Ergometer And On-Court Among Wheelchair Tennis Players, Rowie Janssen, Marit Van Dijk, Thomas Rietveld, Sonja De Groot, Lucas Van Der Woude, Han Houdijk, Riemer Vegter Jul 2024

Comparison Between Outcomes Of A Sprint Test On A Wheelchair Ergometer And On-Court Among Wheelchair Tennis Players, Rowie Janssen, Marit Van Dijk, Thomas Rietveld, Sonja De Groot, Lucas Van Der Woude, Han Houdijk, Riemer Vegter

ISBS Proceedings Archive

The current study compared a wheelchair sprint in the laboratory (lab) on a wheelchair ergometer with a wheelchair sprint on-court in a group of experienced wheelchair tennis players. Nine wheelchair tennis players performed a 10m sprint in the lab, on a computerized wheelchair ergometer, and a 10m sprint on-court, equipped with inertial measurement units. Test duration, mean power output and mean velocity showed no differences between lab and field sprints, peak velocity was consistently higher in the field sprint. Despite methodological differences and experienced rolling resistance between the lab and field sprint, test duration, achieved power output and mean velocity …

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A Kinematic Analysis Of Shot Putters At A Division I University, Roman Waldera, Bryan Christensen, Kyle Collins, Joel M. Hektner, Justin St Clair Jul 2024

A Kinematic Analysis Of Shot Putters At A Division I University, Roman Waldera, Bryan Christensen, Kyle Collins, Joel M. Hektner, Justin St Clair

ISBS Proceedings Archive

The purpose of this research was to examine the peak height during the flight phase and trunk kinematics during the landing phase, and their effects on throwing distance in the shot put using MOCAP. A secondary purpose was to examine differences between the throwing styles and gender. The participants were 12 university-level shot put throwers (six males, six females). A technique by trunk angle interaction effect just below the level of significance was found (p = .056). Significant relationships were found between throw distance and trunk lateral flexion, with females throwing further with more flexion toward their throwing arm (p …

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Modelling Of Scapular Motion Influences The Estimated Glenohumeral Joint Torques During Volleyball Hitting, Dhruv Gupta, Lotte Steynen, Gaelle Pano, Aimilia Rousaki, Nele Heylen, Gert Vande Broek Jul 2024

Modelling Of Scapular Motion Influences The Estimated Glenohumeral Joint Torques During Volleyball Hitting, Dhruv Gupta, Lotte Steynen, Gaelle Pano, Aimilia Rousaki, Nele Heylen, Gert Vande Broek

ISBS Proceedings Archive

This study aims to understand how much different ways of modelling the scapular motion in musculoskeletal models influence the estimated inverse dynamics torques at the glenohumeral joint in simulations of volleyball hitting. We collected hitting motion data of one advanced volleyball player and compared the scapular motion and inverse dynamics torques at the glenohumeral joint estimated using three different musculoskeletal models that model the scapular motion in different ways. We found root mean squared differences of up to 50 Nm in inverse dynamics torques estimated from the different models and coupling between scapula and humerus can affect these estimates. Highest …

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Lower Limb Joint Work During Countermovement Jumps In Children With Charcot-Marie-Tooth Type 1a, Laura Engler, Florian Dobler, Philip J. Broser, Nathalie Alexander Jul 2024

Lower Limb Joint Work During Countermovement Jumps In Children With Charcot-Marie-Tooth Type 1a, Laura Engler, Florian Dobler, Philip J. Broser, Nathalie Alexander

ISBS Proceedings Archive

The purpose of this study was to identify lower limb joint power and work in countermovement jumps (CMJ) in children with Charcot-Marie-Tooth type 1A (CMT1A). Therefore, previously collected CMJ data of seven children with CMT1A were compared to seven age- and sex-matched typically developing children (TDC). We focused on the parameters angles, moments, power and work of the hip, knee and ankle joint. In the knee and ankle joints, significantly lower values of power, positive work, and total work were found in children with CMT1A. Furthermore, a lower percentage of knee and ankle contributions to total work was found when …

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Plantar Pressure Differences Between Low-Risk And High-Risk Knee Osteoarthritis Runners: A Preliminary Study, Phillis Soek Po Teng, Ryan Jun Kai Tan Jul 2024

Plantar Pressure Differences Between Low-Risk And High-Risk Knee Osteoarthritis Runners: A Preliminary Study, Phillis Soek Po Teng, Ryan Jun Kai Tan

ISBS Proceedings Archive

Little is known about the biomechanical factors that predate knee osteoarthritis (OA) for high-risk recreational participants. This study aims to investigate if plantar pressure differences exist between low and high-risk knee OA runners. Fifteen male recreational runners participated in a preliminary study and were divided into low-risk (N = 8) and high-risk (N = 7) knee OA groups. Both groups ran 100 metres thrice in both indoor and outdoor settings at a comfortable pace. Participants’ plantar pressure was measured. No significant differences in plantar pressure between low-risk and high-risk knee OA runners were found. Future studies may consider employing a …

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Gender Effect On Torque And Explosive Characteristics At Knee Extensor In Triathletes With High And Low Eating Attitudes, Xin-Cen Wen, Wei-Chun Hsu, Li-Xin Tang, Ting-En Li, Jo-Yu Chung, Yi-Jia Lin Jul 2024

Gender Effect On Torque And Explosive Characteristics At Knee Extensor In Triathletes With High And Low Eating Attitudes, Xin-Cen Wen, Wei-Chun Hsu, Li-Xin Tang, Ting-En Li, Jo-Yu Chung, Yi-Jia Lin

ISBS Proceedings Archive

This study examined the impact of eating attitudes on the strength, agility, explosiveness, and endurance performance of 26 triathletes who were categorized into EAT-Better and EAT-Worse groups. Isometric knee extensor maximal voluntary contractions were conducted before and after cycling incremental VO2 max tests. Results showed that there were no significant between-group differences at baseline and there were gender differences in Peak Knee Extensor Joint Torque and Knee Extensor Joint Impulse. At fatigue status, only females exhibited a decrease in fatigue-induced Knee Joint Impulse. Although there were no significant between-group differences in fatigue status, EAT-Worse exhibited a more notable decrease than …

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Kinematic And Muscular Strategies Of The Lower Back During Backward Somersault Landing In Gymnastics, Rébecca Crolan, Romane Bidet, Fabien Dal Maso, Mathieu Ménard, Charles Pontonnier, Diane Haering Jul 2024

Kinematic And Muscular Strategies Of The Lower Back During Backward Somersault Landing In Gymnastics, Rébecca Crolan, Romane Bidet, Fabien Dal Maso, Mathieu Ménard, Charles Pontonnier, Diane Haering

ISBS Proceedings Archive

The purpose of this study was to investigate the kinematics and muscle activity of the lower limbs and lumbar spine during the landing of a jump in female gymnasts. Sixteen adult gymnasts performed round-offs followed by a back somersault. Lumbar, hip, and knee joint angles at peak GRF and EMG activity of 4 lumbar spine muscles were recorded. The study reveals a large heterogeneity in the kinematic and muscular strategies used by the gymnasts. A more detailed investigation is required to gain a better understanding of the motor behaviors observed, with a view to potentially improving individualized monitoring during the …

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Runners Fatigue Earlier On A Treadmill Versus Overground: Kinematic Evaluation Of A Run-To-Exhaustion, Robbert P. Van Middelaar, Frank J. Wouda, Jasper Reenalda Jul 2024

Runners Fatigue Earlier On A Treadmill Versus Overground: Kinematic Evaluation Of A Run-To-Exhaustion, Robbert P. Van Middelaar, Frank J. Wouda, Jasper Reenalda

ISBS Proceedings Archive

Running biomechanics can be different between treadmill and overground, especially with fatigue during a run-to-exhaustion. The aim of this study was to investigate impact variables and kinematics of participants running an identical treadmill and overground fatigue protocol. Runners ran to exhaustion 9 minutes earlier on the treadmill compared to overground, with similar heart rate and rate of perceived exhaustion. Only peak sternal acceleration was significantly different between conditions, but only in the fatigue state. Environmental factors in a lab, such as air flow absence, may affect the aerobic capacity during running. No clear biomechanical differences suggest that a similar state …

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Comparing Work And Rate Of Force Development During Propulsive Phase As Pilot Study In Explosive Movements, Li-Xin Tang, Wei-Chun Hsu, Jiceh-Der Dong Fang, Wei-Lun Su, Xin-Cen Wen, Zhong-Rong Hsieh, Yi-Jia Lin Jul 2024

Comparing Work And Rate Of Force Development During Propulsive Phase As Pilot Study In Explosive Movements, Li-Xin Tang, Wei-Chun Hsu, Jiceh-Der Dong Fang, Wei-Lun Su, Xin-Cen Wen, Zhong-Rong Hsieh, Yi-Jia Lin

ISBS Proceedings Archive

This is a pilot study that aims to compare work and rate of force development (RFD) during the propulsive phase in loaded and unloaded conditions across countermovement jump (CMJ), jump shrug (JS), and power clean (PC) exercises. University students with regular exercise habits were recruited. The motion capture system and force plates were used for biomechanical analysis. The positive work during the propulsive phase significantly differs in CMJ, JS, and PC (p

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The Grip Distribution Analysis Between Badminton Smash And Jump Smash, Fu Kao, Min Kuang Pan, Chiu Yuh-Hong, Chien Lu Tsai Jul 2024

The Grip Distribution Analysis Between Badminton Smash And Jump Smash, Fu Kao, Min Kuang Pan, Chiu Yuh-Hong, Chien Lu Tsai

ISBS Proceedings Archive

Badminton smash is one of the most powerful and fastest techniques in racket sports. The purpose of this study was to analyze the grip force and pressure of a collegiate first-class badminton player while performing smash and jump smash movements. A grip pressure system (500Hz) and a high-speed digital camera (2000Hz) were simultaneously used to collect eighteen areas of grip force and pressure of the dominant hand, along with 2D kinematics motion images. The results revealed that the initial shuttle velocity of the jump smash was faster than that of the smash stroke. Additionally, the swing movement of the jump …

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Inter-Limb Coordination According To The Use Of Footstrap During Pumping In Windsurfer: A Single Subject Pilot Study, Sabin Chun, Jongchul Park Jul 2024

Inter-Limb Coordination According To The Use Of Footstrap During Pumping In Windsurfer: A Single Subject Pilot Study, Sabin Chun, Jongchul Park

ISBS Proceedings Archive

The purpose of this study was to quantify limb coordination patterns according to the use of footstraps when pumping in windsurfer. We hypothesized that pumping would show different coordination patterns depending on footstrap use. One windsurfer participated in the experiment and performed two types of pumping (footstrap and non-footstrap). Inertial measurement unit (IMU) sensors were using for obtain kinematic data for the elbow, hip, and knee joints. The continuous relative phase angles of elbow-knee and hip-elbow were calculated using kinematic data obtained from IMU sensors. This study showed that limb coordination patterns differed depending on use footstraps. These results can …

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Can Imus Accurately Detect Differences In Dynamic Constraint-Governed Tasks? Application To The Layup Shot In Basketball, Nuha Mohammed Alkhalaf, Matthew Pain, Michael Hiley Jul 2024

Can Imus Accurately Detect Differences In Dynamic Constraint-Governed Tasks? Application To The Layup Shot In Basketball, Nuha Mohammed Alkhalaf, Matthew Pain, Michael Hiley

ISBS Proceedings Archive

The purpose of this study was to assess the validity and reliability of an inertial measurement unit (IMU) system against an optical motion capture system during a dynamic complex task, the layup shot in basketball. Eight basketball players performed 10 trials with and 10 without a defender. Key kinematic variables (jump height, take-off angle, joint angles, COM displacement) were derived and agreement (Bland-Altman plots) and disagreement (RMSE, SPM) calculations were carried out for each trial. The IMU system provided agreeable results for jump height and take-off angle, while joint angles and COM displacement agreement were plane-specific. A between-condition analysis demonstrated …

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