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Gender Differences In Inter-Segment Foot Kinetics During Running, Tomohito Nakatsugawa, Yuya Ezawa, Takeo Maruyama Jul 2024

Gender Differences In Inter-Segment Foot Kinetics During Running, Tomohito Nakatsugawa, Yuya Ezawa, Takeo Maruyama

ISBS Proceedings Archive

Gender differences in kinetics may be associated with the incidence of specific overuse injuries. However, inter-segment foot kinetics during running have not been investigated between genders. The purpose of this study was to compare multi-segment foot kinetics during running between males and females. Eleven males and nine females ran barefoot with rearfoot strike at 3.3 m/s ± 10% along a 10 m runway. Segmental moment and power at midfoot and ankle in sagittal plane were calculated, and peak moment, positive and negative power were compared by gender. Peak positive and negative midfoot power were significantly larger in females than in …

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The Relationship Between Neurocognition And Side-Step Cutting Biomechanics In Women’S Australian Football Players, Tess L. Rolley Miss, Natalie Saunders, Ashlee Hendy Mrs, Brendan Major Mr, Alicia Goodwill Mrs, Sandy Shultz Mr, Aaron Fox Mr Jul 2024

The Relationship Between Neurocognition And Side-Step Cutting Biomechanics In Women’S Australian Football Players, Tess L. Rolley Miss, Natalie Saunders, Ashlee Hendy Mrs, Brendan Major Mr, Alicia Goodwill Mrs, Sandy Shultz Mr, Aaron Fox Mr

ISBS Proceedings Archive

Despite increased awareness and targeted efforts, anterior cruciate ligament (ACL) injuries continue to frequently occur within the women’s Australian-rules football league (AFLW). AFLW ACL injuries frequently occur when performing a defensive side-step cut. Considering the reactive nature of this scenario, neurocognitive function may be an important risk factor. Therefore, the purpose of this study was to investigate the relationship between neurocognition and side-step cutting biomechanics in women’s Australian football players. Relationships between neurocognitive measures and 3D knee loads during unanticipated side-stepping were examined. No statistically significant relationships were found. These findings provide recommendations for future research to explore different cognitive …

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Kinematic Comparison Of Opencap And Imu With Marker-Based Motion Capture In Treadmill Running: A Pilot Study, Muhammad Nur Shahril Iskandar Mr, Phillis Soek Po Teng Dr Jul 2024

Kinematic Comparison Of Opencap And Imu With Marker-Based Motion Capture In Treadmill Running: A Pilot Study, Muhammad Nur Shahril Iskandar Mr, Phillis Soek Po Teng Dr

ISBS Proceedings Archive

The purpose of this pilot study was to compare lower-limb running kinematics measured using a markerless system, OpenCap, and inertial measurement units (IMUs) against the marker-based motion capture (mocap) system. One participant ran at 2.22 m/s on a treadmill for one minute. Mean absolute error (MAE) and root mean square error (RMSE) of hip, knee, and ankle flexion were calculated independently for all 3 devices. Time synchronization of devices was facilitated by performing a ‘kick’ and identifying its peak knee angle prior to running. Offset correction was also applied to OpenCap and IMUs data to match those of marker-based mocap …

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Applying Dose-Response Analysis In Sport Biomechanics: An Example Of Badminton Footwork And Footwear, Qichang Mei A/Prof, Xiaoyi Yang, Justin Wade Fernandez, Yaodong Gu Jul 2024

Applying Dose-Response Analysis In Sport Biomechanics: An Example Of Badminton Footwork And Footwear, Qichang Mei A/Prof, Xiaoyi Yang, Justin Wade Fernandez, Yaodong Gu

ISBS Proceedings Archive

Efficient footwork and appropriate footwear are important elements in badminton. This study aims to report the application of dose-response analysis in sports biomechanics, presenting the example of analysing the biomechanical response to training intervention with increased wearable resistance (WR) loads and the response of footwork performance to systematically increased wedge hardness in the design of badminton footwear. A further technique of data dimensionality reduction was employed to decipher the dose-response effect via reporting key PC explanation of ~90% with WR intervention, and 61.98%, 21.26%, and 8.1%. The example of badminton biomechanics may provide implications for future research and data analysis, …

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Ai-Based Markerless Single-Camera Motion Analysis For Estimating Knee And Hip Joint Kinematics During Gait, Michael Schwenk, Philipp Barzyk, Alina Boden, Daniel Seebacher, Philip Zimmermann, Manuel Stein, Markus Gruber Jul 2024

Ai-Based Markerless Single-Camera Motion Analysis For Estimating Knee And Hip Joint Kinematics During Gait, Michael Schwenk, Philipp Barzyk, Alina Boden, Daniel Seebacher, Philip Zimmermann, Manuel Stein, Markus Gruber

ISBS Proceedings Archive

This study aimed to pilot-test a markerless motion analysis approach (i.e., SMARTGAIT) for estimating knee and hip joint kinematics in the sagittal and frontal plane during overground walking. One person (age 24 years) walked four times over an 8-meter distance. Joint kinematics were measured using SMARTGAIT (single RGB smartphone camera) and Vicon (reference system). Angle trajectories of sixteen gait cycles were used for the analysis. Agreement between SMARTGAIT and Vicon angle trajectories was greater in the sagittal plane (hip: Pearson’s r=0.989; knee: r=0.990; root mean square error [RMSE] ≤2.6 deg) compared to the frontal plane (hip: r=0.789; knee: r=0.793; RMSE …

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Power Up The Swing: A Biomechanical Study Towards A Golf Exosuit, Alireza Nasirzadeh, Song Min Lee, Jihye Jang, Nakwon Ko, Kim Jin Hee, Yong Ung Kwon, Giuk Lee Jul 2024

Power Up The Swing: A Biomechanical Study Towards A Golf Exosuit, Alireza Nasirzadeh, Song Min Lee, Jihye Jang, Nakwon Ko, Kim Jin Hee, Yong Ung Kwon, Giuk Lee

ISBS Proceedings Archive

This biomechanical study investigates the impact of a passive elastic exoband on golf swing performance, focusing on optimizing the timing and magnitude of its stretch to increase the clubhead velocity. We analyzed the performance of two professional golfers wearing the exoband in four configurations. Our findings suggest that pre-stretching the exoband during the backswing, coupled with an optimal X-factor, significantly increases clubhead velocity by efficiently releasing stored elastic energy. Notably, the configuration pulling the left posterior shoulder towards the left ASIS resulted in the highest clubhead velocity and greatest exoband contribution, demonstrating the importance of optimal stretch and energy transfer …

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Analysing Gait Transition Dynamics In Uphill Trail Running From Wearable Devices, Raimundo Sanchez Jul 2024

Analysing Gait Transition Dynamics In Uphill Trail Running From Wearable Devices, Raimundo Sanchez

ISBS Proceedings Archive

This study investigates gait transition speed in trail running on uphill slopes using wearable devices data. It examines Preferred Transition Speed (PTS) and Heart Rate Optimal Transition Speed (HROTS), noting a decrease in both with increasing slope. This suggests an intuitive adaptation among athletes to lower speeds on steeper inclines, challenging the Iso-Efficient Speed concept and showing gait selection is influenced by more than energy efficiency. The analysis of data from 14 trail runners, aged 22-43 with at least one year of trail running experience, reveals distinct gait patterns characterized by a bimodal distribution in cadence and a unimodal distribution …

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Markerless Motion Capture And Optimal Control To Inform Pitching Mechanics And Reduce Injury Risk, Tylan Templin, Sakiko Oyama, Travis Eliason, Daniel Nicolella Jul 2024

Markerless Motion Capture And Optimal Control To Inform Pitching Mechanics And Reduce Injury Risk, Tylan Templin, Sakiko Oyama, Travis Eliason, Daniel Nicolella

ISBS Proceedings Archive

The objective of this study is to demonstrate the utility of predictive musculoskeletal simulations in baseball pitching. An optimal control analysis was developed that aimed to minimize injury risk while maintaining pitching performance. The optimization converged on a solution that reduced peak shoulder internal rotation by 27.1% while maintaining peak hand velocity within 1.7%. The optimized simulation suggested that 1) a lower arm slot 2) greater knee extension in the stride leg would lead to reduced injury risk without degrading performance. This study's findings demonstrate the potential of biomechanical analyses in enhancing performance and reducing injury risks in baseball pitchers.

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Runners Sacrifice Economy For Stability And Traumatic Injury Prevention When Faced With Sudden, Slip-Like Perturbations, Markus Hipper, Luca Braun, Yannick Denis, Bastian Anedda, Janina Helwig, Steffen Willwacher Jul 2024

Runners Sacrifice Economy For Stability And Traumatic Injury Prevention When Faced With Sudden, Slip-Like Perturbations, Markus Hipper, Luca Braun, Yannick Denis, Bastian Anedda, Janina Helwig, Steffen Willwacher

ISBS Proceedings Archive

We investigated the trade-off between metabolic cost and dynamic stability in 15 recreational runners who experienced sudden slip-like anteroposterior perturbations (SLAPs) during treadmill running (2.5 m/s). Following SLAPs, a significant 3.4% increase in the cost of transport was observed. However, there were no significant changes in single gait parameters or lower limb kinematics in the sagittal plane. Future investigations should explore the underlying neuromuscular mechanisms and broader functional biomechanical variables. Overall, we show that human motor control prioritizes dynamic stability more when expecting SLAPs compared to non-expecting them, highlighting a potential trade-off between metabolic efficiency and traumatic injury prevention that …

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Adaptation Of Walking Patterns To Bilateral Loaded Walking, Michael Herzog, Norman Riedel, Melina Beyerlein, Jonas Weber, Barbara Deml, Thorsten Stein Jul 2024

Adaptation Of Walking Patterns To Bilateral Loaded Walking, Michael Herzog, Norman Riedel, Melina Beyerlein, Jonas Weber, Barbara Deml, Thorsten Stein

ISBS Proceedings Archive

Motor adaptation is the process of adjusting motor commands to perform a movement task under altered conditions. The ability and time needed to adapt to an exoskeleton may be crucial to their acceptance and effectiveness. The mechanical changes with exoskeletons are multi-faceted. Therefore, this study focused only on the additional mass and aimed to investigate motor adaptation to bilaterally loaded walking. Six females and six males (24.6±3.8y; 173.3±9.4cm; 66.4±10.1kg) walked with and without weight cuffs attached to their thighs and shanks on a treadmill. Spatio-temporal parameters and lower-limb sagittal angles did not show the hypothesized adaptation progressions and after-effects. Yet, …

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Effects Of Comprehensive Exercise Therapy On Knee Joint Function Among Older Adults With Knee Osteoarthritis, Peixin Shen, Qipeng Song, Xiaoxue Zhu, Dewei Mao Jul 2024

Effects Of Comprehensive Exercise Therapy On Knee Joint Function Among Older Adults With Knee Osteoarthritis, Peixin Shen, Qipeng Song, Xiaoxue Zhu, Dewei Mao

ISBS Proceedings Archive

This study investigated the effects of comprehensive exercise therapy on knee joint function for older adults with knee osteoarthritis (KOA). Sixty-six older adults with KOA were randomly assigned to either the exercise group (EG), the heat and electrotherapy group (HG), or the control group (CG) to receive an 8-week intervention. Two-way repeated measures ANOVA was used to analyze the data of knee pain, proprioception, angle, moment, and strength. At week8, the EG had decreased pain scores, proprioception threshold, and knee abduction moment, increased flexion angle and extensor strength; the EG showed lower pain scores and greater strength than the HG …

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Differences In Muscle Demand Across Take-Off Techniques In The Back Handspring Step Out In Women’S Gymnastics, Gabriella H. Small, Richard R. Neptune Jul 2024

Differences In Muscle Demand Across Take-Off Techniques In The Back Handspring Step Out In Women’S Gymnastics, Gabriella H. Small, Richard R. Neptune

ISBS Proceedings Archive

The back handspring step out (BHS) is a foundational skill in balance beam routines that can be performed using three different take-off techniques (Simultaneous Flexion, Sequential Flexion, Double-Bounce). However, it is unclear if the different techniques require different levels of muscle demand. The purpose of this study was to use modelling and simulation to quantify muscle demand across the three techniques. While there were no differences in total average muscle demand between techniques, the Sequential Flexion technique required more demand from the knee and hip flexors, while the Simultaneous Flexion and Double-Bounce techniques required more demand from the knee and …

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Where And When: Identifying Key Regions Of Overground Sprint For Horizontal Force-Velocity Profiling, Daniel Geneau, Marc Klimstra, Ming-Chang Tsai Jul 2024

Where And When: Identifying Key Regions Of Overground Sprint For Horizontal Force-Velocity Profiling, Daniel Geneau, Marc Klimstra, Ming-Chang Tsai

ISBS Proceedings Archive

The purpose of this study was to identify regions of an overground sprint trial required to accurately determine independent Horizontal Force Velocity (FV) measures. Forty-seven university aged athletes completed two separate overground sprint trials. Baseline FV metrics; theoretical maximum velocity [V_0], peak velocity [V_max], maximum power [P_max], maximum theoretical force [F_0], decrease ratio of force [DRF], and force-velocity slope [〖FV〗_slope] were calculated for each trial. Trials were then modified by systematically removing percentages of the total sprint from the beginning and end of the trial independently. FV metrics were compared at each percentage stage and compared to baseline. Results of …

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Whole-Body Coordinative Strategies Contribute To The Minimization Of Centre Of Mass Displacement In Maximal Velocity Sprinting, Chris L. Vellucci, Shawn Beaudette Jul 2024

Whole-Body Coordinative Strategies Contribute To The Minimization Of Centre Of Mass Displacement In Maximal Velocity Sprinting, Chris L. Vellucci, Shawn Beaudette

ISBS Proceedings Archive

Sprinting is a dynamic skill that requires rapid and precise postural control. This study investigates the association between frontal plane centre of mass (CoM) displacement, whole-body coordination, and sprint velocity. Significant correlations with sprint velocity were found between stance phase frontal plane (cPL), superior inferior range of motion (SI ROM), and sprint velocity. Spatiotemporal coordinative coupling of the bilateral knees and thorax-pelvis axial twisting displayed significant partial correlations with the minimization of frontal plane cPL and SI CoM RoM. The findings of this work suggest that both the upper and lower body contribute to the control of the CoM within …

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Estimating Joint Moments During Treadmill Running Using Various Consumer Based Wearable Sensor Locations, Josh Autton Carter, Xi Chen, Dario Cazzola, Grant Trewartha, Ezio Preatoni Jul 2024

Estimating Joint Moments During Treadmill Running Using Various Consumer Based Wearable Sensor Locations, Josh Autton Carter, Xi Chen, Dario Cazzola, Grant Trewartha, Ezio Preatoni

ISBS Proceedings Archive

We estimated lower limb sagittal plane joint moments during treadmill running using wearable sensors and different commonly used locations. We compared outcomes from supervised recurrent neural network machine learning (ML) models to criterion values from motion capture and inverse dynamics. The normalised root mean squared error between outcomes from the ML model fed with the entire wearable dataset (pressure insoles and inertial measurement units at the foot, wrist, T10, and sacrum) was 8.9%, 13.5%, and 18.2% for the ankle, knee, and hip joint respectively. Removal of any two upper body sensors did not decrease the accuracy of the estimations. This …

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The Impact Of Ground Reaction Force Variables On Bend Sprint Running Performance, Jonathan White, Joseph Moore, Hans Von Lieres Und Wilkau, Gareth Irwin, Cassie Wilson, Timothy Exell Jul 2024

The Impact Of Ground Reaction Force Variables On Bend Sprint Running Performance, Jonathan White, Joseph Moore, Hans Von Lieres Und Wilkau, Gareth Irwin, Cassie Wilson, Timothy Exell

ISBS Proceedings Archive

This study aimed to investigate force production and highlight kinetic variables that relate to bend sprinting performance. Eight competitive sprinters undertook three 60 m sprints around a 36.5 m bend radius. Paired t-tests were run using statistical parametric mapping to compare the left and right stance phases. Pearson correlation coefficients were calculated to assess the relationships between step velocity (SV) and kinetic variables. Significantly greater vertical and inward force was produced during early right stance compared to left. Left inward force was significantly greater than left during mid and late stance. Only braking durations were significantly negatively correlated to SV. …

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Variability Of Sagittal Joint Kinematics Of Female Horse-Riders Over A Jump., Rafaelle Baby, Celeste Wilkins Dr, Laurence Protheroe Dr, Russell Mackechnie-Guire Dr, Kathryn Nankervis Dr Jul 2024

Variability Of Sagittal Joint Kinematics Of Female Horse-Riders Over A Jump., Rafaelle Baby, Celeste Wilkins Dr, Laurence Protheroe Dr, Russell Mackechnie-Guire Dr, Kathryn Nankervis Dr

ISBS Proceedings Archive

This study aimed to improve understanding of horse-rider technique in show jumping, to support the development of training programs. Range of motion, peak flexion and extension angles were estimated for the shoulder, elbows, hips, knees, and ankles of six female riders jumping two different fence types (oxer and straight), using a full-body inertial motion unit (IMU) suit (MVN Awinda). Horse kinematics were recorded using IMU and GPS technology (Alogo Move Pro). All rider joints showed inter-participant (population standard deviation range: 5.4°(ankle) - 43.2° (elbow)) and intra-participant variability (individual SD range: 1.7°(ankle) - 57.5°(hips)). Findings suggest differences in riding strategies and/or …

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Speed-Dependent Increase In Lumbar Lordosis Is Inconsistent With Speed-Independent Pelvic Tilt During Treadmill Running, Tempei Tominaga, Yoshiki Tasaki, Natsuki Sado Jul 2024

Speed-Dependent Increase In Lumbar Lordosis Is Inconsistent With Speed-Independent Pelvic Tilt During Treadmill Running, Tempei Tominaga, Yoshiki Tasaki, Natsuki Sado

ISBS Proceedings Archive

Lumbar lordosis (LL) is considered as an important factor of low back pain. Although LL during running (dynamic LL) and anterior pelvic tilt (APT) are thought to increase simultaneously, this relationship has not been examined when running speed is changed. Here we show that dynamic LL increases with the increase in running speed, whereas APT is invariant during treadmill running at 4.0, 5.5, 7.0 and 8.5 m/s in 18 male collegiate athletes. The speed-dependent increase in dynamic LL suggests that runners and coaches should be cautious that greater mechanical load on the lumbar spine might occur during faster running. The …

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Differences In Ankle Muscle Control Strategies Between Symptomatic And Asymptomatic Pronated Feet During Running, Ting Yu, Jingfeng He, Xianyi Zhang Jul 2024

Differences In Ankle Muscle Control Strategies Between Symptomatic And Asymptomatic Pronated Feet During Running, Ting Yu, Jingfeng He, Xianyi Zhang

ISBS Proceedings Archive

This study aimed to quantify the differences in the control strategies of ankle muscles between symptomatic pronators (SP) and asymptomatic pronators (AP) during running. Thirty participants were measured by a motion capture system and a surface electromyography device. Results showed that the SP and AP had different muscle-tendon unit length changes during the swing phase, with the SP having less shortening of the soleus and peroneus longus (up to 3.6 mm and 4.0 mm, respectively), faster lengthening of the plantar flexors (up to 80.4 mm/s) but larger (up to 5.7 mm) and faster (up to 46.2 mm/s) shortening of the …

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Application Of Qualitative Movement Diagnosis On Sprint Start, Sang Yup Lee, Ethan Davis, Melissa Mache, Chengtu Hsieh Jul 2024

Application Of Qualitative Movement Diagnosis On Sprint Start, Sang Yup Lee, Ethan Davis, Melissa Mache, Chengtu Hsieh

ISBS Proceedings Archive

The purpose of this study was to examine the effect of applying Qualitative Movement Diagnosis (QMD) on sprint start performance. Twelve NCAA II sprinters volunteered for this cross-sectional study. The steps of applying QMD in sprint start performance were introduced. Subjects were asked to perform three pre-intervention trials of block starts in their preferred setting. The block setting and joint kinematics at knee and hip from both sides of body were evaluated. The feedback was provided for the three post-intervention trials. A moderate effect of significant improvement of exist velocity (p = 0.04) was observed as well as lead …

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The Impact Of Limb Symmetry On Stroke-To-Stroke Movement Variability In Para-Swimmers During An Adapted Aerobic Step Test, Matthew Slopecki, Julien Clément, Mathieu Charbonneau, Julie N. Côté Jul 2024

The Impact Of Limb Symmetry On Stroke-To-Stroke Movement Variability In Para-Swimmers During An Adapted Aerobic Step Test, Matthew Slopecki, Julien Clément, Mathieu Charbonneau, Julie N. Côté

ISBS Proceedings Archive

The study purpose was to measure effects of anthropometric limb characteristics on fatigue-related changes in stroke-to-stroke motor variability (MV) of trunk mediolateral (ML) acceleration. Six Paralympic swimmers performed an in-water, fatiguing, freestyle aerobic test consisting of 5 steps of 200m (n = 4); 150m (n = 1) or 100m (n = 1) with a sacrum worn inertial measurement unit. Upper-limb segment lengths were measured, and symmetry indices (LSI) were calculated. Sample entropy (SampEn) and fractal dimension (FD) were calculated on ML acceleration. Fatigue was confirmed with increased RPE (p < 0.01). ANOVA fatigue response models of SampEn and FD improved with LSI as a covariate (p < 0.01), showing that symmetry indices affected individual responses to fatigue. Coaches should consider anthropometric symmetry when designing para-swimming training plans.

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Effects Of Stack Height On Running Biomechanics During Level, Uphill, And Downhill Running At Different Speeds, Cagla Fadillioglu, Bernd Stetter, Thorsten Stein Jul 2024

Effects Of Stack Height On Running Biomechanics During Level, Uphill, And Downhill Running At Different Speeds, Cagla Fadillioglu, Bernd Stetter, Thorsten Stein

ISBS Proceedings Archive

This study aimed to investigate the effects of shoe stack height on comfort assessment, step frequency and lower limb joint range of motions (ROMs) during level, downhill and uphill running with different running speeds since stack height is one of the highly discussed key features of running shoes and was not intensively investigated for sloped running conditions. Seventeen male experienced runners completed the running protocol by wearing three running shoes with different stack heights. The kinematics were collected with a 3D motion capturing system. A comfort questionnaire was asked for each shoe. The lowest stack height resulted in the highest …

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Possibility Of Early Detection Of Parkinson’S Disease Using Convolutional Neural Network During Six-Minute Walk Test, Hyejin Choi, Changhong Youm, Hwayoung Park, Bohyun Kim, Juseon Hwang, Minsoo Kim Jul 2024

Possibility Of Early Detection Of Parkinson’S Disease Using Convolutional Neural Network During Six-Minute Walk Test, Hyejin Choi, Changhong Youm, Hwayoung Park, Bohyun Kim, Juseon Hwang, Minsoo Kim

ISBS Proceedings Archive

This study aimed to determine the accuracy of distinguishing patients with early Parkinson’s disease (PD) (n=27) from healthy controls (n=50) using a convolutional neural network (CNN) technique with an artificial intelligence deep learning algorithm based on a 6-minute walk test (6MWT) using wearable sensors. After wearing the six sensors, the participants performed the 6MWT, and the time-series data were converted into new images. The main results demonstrated the highest discrimination accuracy of 72% on the left arm gyroscope data. The results confirmed the possibility of using CNN models to distinguish between individuals with early PD and controls. Moreover, the 6MWT …

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Machine Learning Approach To Classify Decline Of Cognitive And Muscle Function In Older Women: Gait Characteristics Based On Three Speeds, Bohyun Kim, Changhong Youm, Hwayoung Park, Hyejin Choi, Juseon Hwang, Minsoo Kim Jul 2024

Machine Learning Approach To Classify Decline Of Cognitive And Muscle Function In Older Women: Gait Characteristics Based On Three Speeds, Bohyun Kim, Changhong Youm, Hwayoung Park, Hyejin Choi, Juseon Hwang, Minsoo Kim

ISBS Proceedings Archive

This study aimed to evaluate the accuracy of machine learning models based on selected gait features caused by cognitive (Cog) and muscle function (MF) declines. A total of 154 women aged 65 or older performed cognitive assessments, five times sit-to-stand test, and gait test at three speeds (preferred, slower (SWS), and faster walking speed (FWS)). The machine learning model accuracies revealed that the random forest (RF) model had 91.2% accuracy when using all gait features and 91.9% accuracy when using the three features (walking speed and coefficient of variation of the left double support phase at FWS and right double …

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Acute Effects Of Footwear And Footstrike Pattern On Achilles Tendon Loading During Running, Xini Zhang, Liqin Deng, Songlin Xiao, Weijie Fu Jul 2024

Acute Effects Of Footwear And Footstrike Pattern On Achilles Tendon Loading During Running, Xini Zhang, Liqin Deng, Songlin Xiao, Weijie Fu

ISBS Proceedings Archive

The study aimed to investigate the effect of footwear and foot strikes on Achilles tendon (AT) loading during running. Eleven male recreational runners with rearfoot strike pattern were recruited. The ground reaction force, kinematics, and kinetics of the ankle joint at 10 km/h were collected using an instrumented split-belt treadmill and a motion capture system. The morphological and mechanical characteristics of AT were recorded and calculated with a synchronous ultrasonic imaging instrument. The results showed a significantly greater peak AT force in minimalist shoes and forefoot strike pattern. The peak force and length change of the AT significantly increased when …

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Agreement And Reliability Of Gait Metrics Measured Using The Stride Smart System In The Alterg Treadmill Compared To Xsens, Michelle Lyons, Louise Burnie, Kirsty Lindsay Jul 2024

Agreement And Reliability Of Gait Metrics Measured Using The Stride Smart System In The Alterg Treadmill Compared To Xsens, Michelle Lyons, Louise Burnie, Kirsty Lindsay

ISBS Proceedings Archive

The aim of this study was to assess the agreement and reliability of the spatiotemporal gait metrics measured by the Stride Smart system in the AlterG treadmill compared to the Xsens motion capture system. 17 healthy adults walked on an AlterG treadmill at 3km/h and 4 km/h at 4 bodyweight conditions (100, 75, 50, 25%) while wearing Xsens sensors, repeating this session 7.0 ± 0.7 days later. Gait metrics were calculated using the Xsens motion cloud software, and by the treadmill using the Stride Smart system. Agreement and between-session reliability for the Stride Smart Gait metrics were assessed. Stride Smart …

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Machine Learning Approaches For Identification Of Parkinson’S Disease Severity Using Multimodal Features, Hwayoung Park, Changhong Youm, Bohyun Kim, Hyejin Choi, Juseon Hwang, Minsoo Kim Jul 2024

Machine Learning Approaches For Identification Of Parkinson’S Disease Severity Using Multimodal Features, Hwayoung Park, Changhong Youm, Bohyun Kim, Hyejin Choi, Juseon Hwang, Minsoo Kim

ISBS Proceedings Archive

This study aimed to create a digital biomarker for assessing the severity of Parkinson's disease (PD) using multimodal features from 50 PD patients and 50 healthy controls. They underwent clinical tests, gait analysis using a motion capture system, postural and functional evaluations, and lifestyle questionnaires. These multimodal features underwent dimensionality reduction techniques such as logistic regression and principal component analysis to identify PD severity using the MDS-UPDRS total score. The results developed six models using machine learning algorithms (Linear Regression and Random Forest), with Model 1 performing the best; spatiotemporal variables from gait analysis were crucial in identifying PD severity. …

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The Influence Of Bodyweight On Spatiotemporal Parameters During Walking On The Alterg Treadmill, Louise Burnie, Michelle Lyons, Kirsty Lindsay Jul 2024

The Influence Of Bodyweight On Spatiotemporal Parameters During Walking On The Alterg Treadmill, Louise Burnie, Michelle Lyons, Kirsty Lindsay

ISBS Proceedings Archive

AlterG treadmills are used for rehabilitation in clinical populations as they can provide up to 80% bodyweight (BW) support, however it is unknown how high levels of unloading might affect spatiotemporal parameters during walking on the AlterG treadmill. 18 healthy adults walked on an AlterG treadmill at 3km/h and 4 km/h at four BW conditions (100, 75, 50, 25%) while wearing Xsens sensors and gait metrics were calculated using the Xsens motion cloud software. Reducing BW in healthy adults via the BW support system on the AlterG treadmill had a small but significant effect on left stance time, swing time …

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The Trade-Off Between Cumulative Joint Loading And Cost Of Transport When Altering Anterior Trunk Lean Angle In Running, Luca Braun, Patrick Mai, Markus Hipper, Yannick Denis, Bastian Anedda, Janina Helwig, Dominic Gehring, Steffen Willwacher Jul 2024

The Trade-Off Between Cumulative Joint Loading And Cost Of Transport When Altering Anterior Trunk Lean Angle In Running, Luca Braun, Patrick Mai, Markus Hipper, Yannick Denis, Bastian Anedda, Janina Helwig, Dominic Gehring, Steffen Willwacher

ISBS Proceedings Archive

The study aimed to establish dose-response relationships between systematically altered anterior trunk leaning (ATL) and lower extremity cumulative joint loading (angular impulse x number of strides) as well as cost of transport (COT) in distance running. Twenty-eight recreational runners underwent a series of six treadmill runs (2.5 m/s) with five predefined ATL conditions (from -4° extension to 28° flexion) and one self-selected ATL condition for five minutes with 3D motion capture and spirometry. Increasing ATL systematically decreased cumulative knee joint loading and increased cumulative hip joint loading in all conditions. However, running outside the preferred running style increased COT. Designing …

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Influence Of Inertial Measurement Unit Placement On Knee Flexion Angle Measurement During Cycling, Tjorven Schnack, Arnold Baca, Philipp Neumeister Jul 2024

Influence Of Inertial Measurement Unit Placement On Knee Flexion Angle Measurement During Cycling, Tjorven Schnack, Arnold Baca, Philipp Neumeister

ISBS Proceedings Archive

Inertial measurement units (IMUs) enable measurements of joint kinematics during sports in the field. The purpose of this study was to investigate the use of IMUs for measuring the knee flexion angle during cycling. To expand the limited research on optimal placement of IMUs on body segments, three different IMU placement setups were tested. Joint angles were calculated from the IMU orientations via OpenSim. Kinematics were captured from six experienced cyclists and compared to optical motion capture. Apart from an amplitude offset between the angle courses measured by IMUs and optical motion capture, no significant differences were observed between measurement …

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