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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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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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Regional Muscle Activation Of The Biceps Femoris, Alexander Fassbender, Kiros Karamanidis, Wolfgang Potthast Jul 2024

Regional Muscle Activation Of The Biceps Femoris, Alexander Fassbender, Kiros Karamanidis, Wolfgang Potthast

ISBS Proceedings Archive

The purpose of this study was to examine regional BFlh activation during isometric knee flexion. Using an isokinetic device and high-density EMG, 11 males performed contractions at all combinations of short, medium and long MTU lengths and three torque levels (30%MVC, 60%MVC, 90%MVC). Distal BFlh exhibited significantly higher activation at 60% MVC and 90%MVC than proximal, indicating intensity-dependent heterogeneity. No effects of muscle length on muscle activation were found. Additionally, the findings suggest BFlh operates on the ascending limb of the force-length relationship. Practitioners should be mindful of potential intramuscular variations in biarticular …

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The Difference In Visual Search Strategies Between Expert And Novice Instructor In Exercise Movement Assessment, Jonghun Jin, Sangah Bae, Naekyoung Lee, Minji Kim, Soyoun Jee, Bobae Song, Dongwook Seo, Ki-Kwang Lee Jul 2024

The Difference In Visual Search Strategies Between Expert And Novice Instructor In Exercise Movement Assessment, Jonghun Jin, Sangah Bae, Naekyoung Lee, Minji Kim, Soyoun Jee, Bobae Song, Dongwook Seo, Ki-Kwang Lee

ISBS Proceedings Archive

The purpose of this study was to compare visual search strategies (fixations duration ratio on each segment, frequency of fixations and average of fixations duration) between expert and novice in exercise movement assessment using eye-tracking device. Sixteen experts with 5+ years of experience and seventeen novices with less than 1 year of experience were recruited. In eye-tracking experiment they watched three pre-recorded exercise movement assessments (squats in the frontal and sagittal planes and push-ups in the sagittal plane). There were no significant differences with fixations duration ratio on each segment, frequency of fixations and average of fixations duration. The results …

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A System For Automatic And Fast Gymnastics Pose Estimation And Key Frame Identification, Ilias Masmoudi, Johannes Link, Sebastian Möck, Petra Nissinen, Anne Koelewijn Jul 2024

A System For Automatic And Fast Gymnastics Pose Estimation And Key Frame Identification, Ilias Masmoudi, Johannes Link, Sebastian Möck, Petra Nissinen, Anne Koelewijn

ISBS Proceedings Archive

In artistic gymnastics, performance analysis tools that provide immediate feedback to athletes and coaches are key to optimizing performance. Therefore, we developed a system that provides direct video feedback and automatically identifies key frames relevant to achieve high performance. This system estimates the gymnast’s two-dimensional (2D) and three-dimensional pose from a single-view video and uses a long short-term memory (LSTM) network to identify key frames, in which contact with the ground or an apparatus starts or ends. We compared three 2D pose estimation algorithms and found that MoveNet yielded the highest accuracy, being able to detect 84% of the joints …

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Kinematics Of The Scissors Kick In The Breaststroke, Hiroshi Suito, Keisuke Teramoto, Kazumasa Ozeki Jul 2024

Kinematics Of The Scissors Kick In The Breaststroke, Hiroshi Suito, Keisuke Teramoto, Kazumasa Ozeki

ISBS Proceedings Archive

This study aimed to clarify the kinematic characteristics of the scissors kick in novice breaststroke swimmers. Six participants exhibited the breaststroke kick and three exhibited the scissors kick. All participants performed two 10-m breaststroke kicks with a board while maintaining a face-down underwater position. The breaststroke kicks were recorded using two synchronized underwater cameras, and three-dimensional analysis was performed on the right-sided kicking movements. The results showed that, with knee flexion, participants who performed scissors kicks showed a significantly greater inversion angle, whereas those who performed normal breaststroke kicks exhibited a change from inversion to eversion before the kick phase. …

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Gait Event Detection During Walking Using Deep Learning And Thigh-Worn Accelerometry, Claas Lendt, Tom Stewart Jul 2024

Gait Event Detection During Walking Using Deep Learning And Thigh-Worn Accelerometry, Claas Lendt, Tom Stewart

ISBS Proceedings Archive

Mobility and gait are important indicators of human health. However, measuring them outside of a laboratory setting can be challenging. To measure human physical behaviour in free-living conditions, thigh-worn accelerometers and data-driven algorithms are commonly used. This study explores a deep learning approach that utilises data from a single thigh-worn accelerometer. A temporal convolutional network was trained to predict gait events in healthy adults during various walking conditions. The model demonstrated a high level of detection accuracy (F1 score ≥ 99%) and good time agreement for both gait events, with the 95% limits of agreement being -0.04s and 0.04s. …

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Forefoot Bending Stiffness In The Bobsleigh Push-Start, Jan-Peter Goldmann, Johanna Pohlen, Marvin Zedler Jul 2024

Forefoot Bending Stiffness In The Bobsleigh Push-Start, Jan-Peter Goldmann, Johanna Pohlen, Marvin Zedler

ISBS Proceedings Archive

The purpose of this study was to investigate how forefoot bending stiffness (Kcr) changes with speed across the bobsleigh push-start. Kinematics and kinetics of 15 elite athletes were measured on an indoor track during different phases (Contact 1 & 2, 10 m, 30 m) of the bobsleigh push-start using a MoCap-System and three force plates. Metatarsophalangeal joint (MPJ) angles, moments and Kcr were calculated via MATLAB. In contrast to sprinting, maximum MPJ moments, moments at maximum MPJ dorsiflexion and Kcr showed no significant differences (p > 0.05) about the push-phase due to the inter-individual variations between the …

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Thigh Muscle Activity In Experienced Female Handball Players During Preplanned And Unplanned Sidestep Cuts, Kevin Bill, Patrick Mai, Tron Krosshaug, Uwe G. Kersting Jul 2024

Thigh Muscle Activity In Experienced Female Handball Players During Preplanned And Unplanned Sidestep Cuts, Kevin Bill, Patrick Mai, Tron Krosshaug, Uwe G. Kersting

ISBS Proceedings Archive

The purpose of this study was to assess if there is a difference in the thigh muscle activation patterns between a preplanned and unplanned sidestep cut performed by n = 31 experienced female handball players. Electromyogram vector fields containing the muscle activity of the vastus medialis, vastus lateralis, semitendinosus, and biceps femoris from 100 ms before ground contact until toe-off were created and compared using Statistical Parametric Mapping. Results show lower activity in the unplanned cut. When comparing individual muscles, vastus medialis was the only muscle showing differences between tasks, with the unplanned task eliciting lower activity right before initial …

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Advancing Aquatic Motion Tracking Through Multi-Sensor Data Fusion Surfing The Giant Waves Of Nazaré – Study Case, Marcio Borgonovo-Santos, Damian Perez, Miguel Sanches, Daniela Lopes Jul 2024

Advancing Aquatic Motion Tracking Through Multi-Sensor Data Fusion Surfing The Giant Waves Of Nazaré – Study Case, Marcio Borgonovo-Santos, Damian Perez, Miguel Sanches, Daniela Lopes

ISBS Proceedings Archive

As we delve into the diverse applications of motion tracking from Space to Air and Land, we encounter distinct challenges and opportunities. However, the most significant arise in the aquatic domain, particularly in the maritime environment. The unique characteristics of water behaviour demand novel solutions for accurately tracking and interpreting movement in this dynamic environment. An outstanding outcome of my Sports Sciences PhD was the Fluid Flow Sensor. This groundbreaking multi-sensor innovation enables tracking data considering water flow, expanding research horizons of analytics in water sports. Notably, the technology showcased its exceptional potential through a successful pilot study during a …

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Effect Of Resisted Sled Sprint Training On Sprinting Abilities Of Junior High School Students, Takeru Hamamichi, Kiyotaka Naoi, Susumu Shigeta, Shin-Ichiro Moriyama Jul 2024

Effect Of Resisted Sled Sprint Training On Sprinting Abilities Of Junior High School Students, Takeru Hamamichi, Kiyotaka Naoi, Susumu Shigeta, Shin-Ichiro Moriyama

ISBS Proceedings Archive

This study aimed to clarify the effects of different resisted sled sprint (RSS) loads on the sprinting abilities of junior high school students. Thirty-two junior high school students completed five RSS sessions in a physical education class. Each used a 12-, 14.5-, or 17-kg sled for the RSS training. According to the ratio of sled weight to body mass (%BM), the students were divided into light (25.75 ± 2.57%BM) and heavy (34.46 ± 2.96%BM) groups. Students completed a 50-m run before and after the session, and their running time, running velocity, step frequency, and step length at 50 m and …

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Amateur Boxing Coaches Perceptions Of The Technical Components Of Straight Punches, Raph Britton, Richard Bolger, Michael Hanlon, Robin Healy, Kris Beattie, Gregory Tierney Jul 2024

Amateur Boxing Coaches Perceptions Of The Technical Components Of Straight Punches, Raph Britton, Richard Bolger, Michael Hanlon, Robin Healy, Kris Beattie, Gregory Tierney

ISBS Proceedings Archive

Boxing coaches’ experiential knowledge from a variety of environments can be used to affirm quantitative findings and shed light on areas for future investigation. Five interviews were conducted with expert amateur boxing coaches on straight punch technique in amateur boxing. Reflexive thematic analysis derived higher order themes regarding the contributing body segments to straight punches, including the lower body, core and upper body. Coaches described punches as starting from the ground and transitioning toward the upper body ending upon impact via the fist. Coaches identified that important components of straight punches include stepping in, rotating the rear foot, rotating the …

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Testing Injury Risk In Acl-Reconstructed Football Players On The Field: A Practical Tool To Assess Cutting Biomechanics Through Wearable Sensors, Stefano Di Paolo, Marianna Viotto, Alberto Grassi, Laura Bragonzoni, Stefano Zaffagnini Jul 2024

Testing Injury Risk In Acl-Reconstructed Football Players On The Field: A Practical Tool To Assess Cutting Biomechanics Through Wearable Sensors, Stefano Di Paolo, Marianna Viotto, Alberto Grassi, Laura Bragonzoni, Stefano Zaffagnini

ISBS Proceedings Archive

The aim of the present study was to inspect differences between healthy and ACLR football players through a kinematic on-field assessment of cut manoeuvres. 62 (47 healthy, 15 ACLR) were enrolled. The players performed planned 90° changes of direction and unplanned football-specific changes of direction. Kinematics was collected through 8 wearable inertial sensors (MTw Awinda, Xsens). Healthy and ACLR players differed in hip and knee rotation during the entire cut phase (p

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Softball Players With Shoulder Injuries Exhibit Upper-Body Compensatory Strategies Compared To Healthy Controls: A Wearable Inertial Sensors Study, Raffaele Zinno, Stefano Di Paolo, Maxime Hoyaux, Alisea Minardi, Laura Bragonzoni Jul 2024

Softball Players With Shoulder Injuries Exhibit Upper-Body Compensatory Strategies Compared To Healthy Controls: A Wearable Inertial Sensors Study, Raffaele Zinno, Stefano Di Paolo, Maxime Hoyaux, Alisea Minardi, Laura Bragonzoni

ISBS Proceedings Archive

The aim of the study was to assess the kinematic differences in the upper limb and trunk between healthy and shoulder-injured softball players. Eleven first-division softball players (mean age 25.9±8.1) were enrolled. Five players experienced a shoulder injury with consequent surgery. The players were assessed while performing a standard throw, from the moment when they pick up a ball on the ground (Pick-up Phase) to the complete throw (Pass Phase), using 11 wearable inertial sensors (Xsens MTw Awinda). Peak joint kinematics and range of motion (ROM) were analysed. The shoulder-injured players showed less shoulder internal/external rotation (p

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Analysis Of Gaze Behavior And Electromyography During Nihon Kendo Kata, Minato Kawaguchi, Riku Watanabe, Shun Uehara, Kanta Uesawa, Kentaro Takahashi Jul 2024

Analysis Of Gaze Behavior And Electromyography During Nihon Kendo Kata, Minato Kawaguchi, Riku Watanabe, Shun Uehara, Kanta Uesawa, Kentaro Takahashi

ISBS Proceedings Archive

This study aims to elucidate whether the gaze strategies of performers in Nihon Kendo kata and the muscle activity involved in gripping the sword depend on skill level. Six college-aged students participated, three having over 14 years of experience and the remaining three being novices. A wearable eye-tracking device was employed, and the surface electromyography (EMG) of the flexor digitorum profundus was recorded. We calculated objective features and applied a two-way ANOVA. As a result, a main effect of the expertise level was observed for the number and duration of fixations, the average acceleration obtained from eye movement, and the …

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Determination Of Gait Events From 2d Video Using Long Short-Term Memory Neural Networks, Marion Mundt, Steffi Colyer, Jacqueline Alderson Jul 2024

Determination Of Gait Events From 2d Video Using Long Short-Term Memory Neural Networks, Marion Mundt, Steffi Colyer, Jacqueline Alderson

ISBS Proceedings Archive

The purpose of this study was to automatically identify the key gait events, foot-strike and foot-off, from 2D video data. Markerless motion capture and pose estimation have become accepted tools in many biomechanics applications to automatically analyse 2D videos of human movement. However, the accurate detection of gait events from various camera views is still a challenge. We trained a long short-term memory neural network to identify foot-strike and foot-off events in walking and running trials captured from nine different camera views based on 2D pose estimation keypoint labels. We achieved a detection accuracy of 86.3-96.1% (F1 score 76.2-92.5%). These …

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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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Countermovement Jump Performance Variables Correlate With Weightlifting Performance In Elite Participants, Christopher Geiser, Nayun Ahn, Kristof Kipp Jul 2024

Countermovement Jump Performance Variables Correlate With Weightlifting Performance In Elite Participants, Christopher Geiser, Nayun Ahn, Kristof Kipp

ISBS Proceedings Archive

It is valuable to monitor athletes’ training efficacy to better guide their conditioning and performance programs. In weightlifting, assessing 1RM routinely may require longer recovery and limit training. The purpose of this study was to identify associations between 1RM weightlifting performance and variables calculated from a maximal countermovement jump (CMJ). Force data were collected and variables calculated for seven elite weightlifters during CMJs. Maximum rate-of-force development (RFD) during the countermovement jump was associated with both Snatch (r^2 0.56, p=0.05) and Clean & Jerk (C&J) (r^2=0.49, p=0.08) performance. Eccentric time (r^2=0.55, p=0.06) and ecc-conc ratio (r^2=0.68, p=0.02) were correlated with C&J …

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Overweight And Underweight Implements’ Impact On Critical Factors Of Rotational Shot-Putting Technique, Leah N. Klein, James Becker, Justin Whitten, Megan Peach Jul 2024

Overweight And Underweight Implements’ Impact On Critical Factors Of Rotational Shot-Putting Technique, Leah N. Klein, James Becker, Justin Whitten, Megan Peach

ISBS Proceedings Archive

The purpose of this study was to evaluate the impacts of heavy and light implements on the kinematics of the rotational shot put technique. Ten collegiate shot putters completed three rotational shot put attempts using competition, overweight and underweight implements. Whole body kinematics were recorded on each throw to evaluate key aspects of shot putting technique including pelvis-torso separation, rear leg hip flexion, rear leg knee flexion, and peak pelvis angular velocity during specific phases of the throw. Results of this study highlight that when using an overweight implement, athletes have significantly less hip flexion compared to the competition-weighted implement …

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Association Between Morphology And Hip And Knee Joint Reaction Forces During Running In American Football Players: Implications For Osteoarthritis Development, Monique Mokha, Sean Mcbride, Jacob Haberer, Johnathan Polletta, Nicole Branum, Marissa Bonsangue, Andrew Schafer, Jack Stensland, Nivene Hojeij, Elie Christoforides Jul 2024

Association Between Morphology And Hip And Knee Joint Reaction Forces During Running In American Football Players: Implications For Osteoarthritis Development, Monique Mokha, Sean Mcbride, Jacob Haberer, Johnathan Polletta, Nicole Branum, Marissa Bonsangue, Andrew Schafer, Jack Stensland, Nivene Hojeij, Elie Christoforides

ISBS Proceedings Archive

National Football League (NFL) American football players are exposed to osteoarthritis risk factors of obesity and high joint loads. We sought to examine the association between total body mass (TBM), lean body mass (LBM), body fat percent (BFP), peak compressive hip and knee joint reaction forces (JRF), and vertical ground reaction forces (vGRF) in NFL draft eligible players during a high-speed run. One-hundred twenty-five participants ran at 6.5 m/s for 5 sec on an instrumented treadmill. Results showed moderate to low significant negative associations between TBM, LBM, and vGRF and hip and knee compression JRF. There was a negligible significant …

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A Practice-Oriented Teaching Strategy Involving Bouldering Improves Students’ Academic Understanding Of Mechanics, Xiao-Qi Zhang, Philip X. Fuchs, Jia Yi Chow, Chen-Fu Huang Jul 2024

A Practice-Oriented Teaching Strategy Involving Bouldering Improves Students’ Academic Understanding Of Mechanics, Xiao-Qi Zhang, Philip X. Fuchs, Jia Yi Chow, Chen-Fu Huang

ISBS Proceedings Archive

Practical experience is recommended in teaching to overcome students’ difficulties in learning and applying theoretical concepts such as Newtonian mechanics. The purpose of this study was to test whether incorporating bouldering in a biomechanics course improves students' academic understanding of mechanics. Twenty-one students participated in 10 weeks of traditional lecturing and a subsequent 4-week bouldering intervention. Using different versions of a validated biomechanics test, exam scores were higher after bouldering (73±15%) than before (53±21%) (Z=-3.783, p

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Do Female Weightlifters Snatch Differently? Analysis Of Barbell Kinematics Using Statistical Parametric Mapping, Ingo Sandau, Andrea Rudloff Jul 2024

Do Female Weightlifters Snatch Differently? Analysis Of Barbell Kinematics Using Statistical Parametric Mapping, Ingo Sandau, Andrea Rudloff

ISBS Proceedings Archive

This study aimed to analyse gender differences in barbell kinematics of the snatch in international elite weightlifters. At the 2019 Senior World Championships, horizontal and vertical barbell kinematics of the 1RM snatch lifts of the top 5 female and male weightlifters of all 10 body weight categories were assessed using two-dimensional video analysis (50 Hz). Gender differences were analysed for kinematic time series data using statistical parametric mapping. Results revealed almost similar mean snatch barbell trajectory and velocity pattern for female compared to male weightlifters. Significant differences were detected during the 1st pull with lower barbell distance and velocity. However, …

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Pelvic List Strength As An Indicator Of Sprint Performance, Ryu Nagahara, Kento Yoneta Jul 2024

Pelvic List Strength As An Indicator Of Sprint Performance, Ryu Nagahara, Kento Yoneta

ISBS Proceedings Archive

This study aimed to develop a new test for evaluating pelvic list strength and to clarify whether the test would be an indicator of sprint performance. The new pelvic list strength test evaluated the vertical ground reaction force produced by maximal pelvic list using a force plate which was set underneath the supporting foot. For the experiment, 14 male sprinters performed 60-m sprint and the pelvic list strength test. The pelvic list strength test values were 6.05 ± 1.36 [N/kg] and 6.07 ± 1.02 [N/kg] for the right and left sides, respectively. Significant correlations were found between the right pelvic …

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Twenty-Year Trends In Student Readiness, Performance, And Learning In Biomechanics, Chengtu Hsieh, Brian Wallace, Duane Knudson Jul 2024

Twenty-Year Trends In Student Readiness, Performance, And Learning In Biomechanics, Chengtu Hsieh, Brian Wallace, Duane Knudson

ISBS Proceedings Archive

The aim of this study was to investigate the trend in student’s Biomechanics Concept Inventory (BCI) performance over the past two decades (2003 - 2023) in the United States. The mean pre-, post-tests of BCI performance, and normalised gain (g) were extracted from published studies for analysis. Eight studies with 937 participants were examined. The Mann-Kendall tests were used to assess the trend of the datasets. No significant downward or upward trends were observed for both pre-tests (p = 1.0) and post-tests (p = 0.07) performance. However, there is an upward trend in students' normalized gains since 2003 …

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Jumping And Non-Jumping Athletes Land Differently: Implications For Return To Sport, Jeroen P. Marks, Marsha Tijssen, Mohamed El Hadouchi, Ina Janssen Jul 2024

Jumping And Non-Jumping Athletes Land Differently: Implications For Return To Sport, Jeroen P. Marks, Marsha Tijssen, Mohamed El Hadouchi, Ina Janssen

ISBS Proceedings Archive

Currently the LSI is used to determine whether an athlete is ready to return-to-sport (RTS). However, research shows that LSI inadequately identifies RTS readiness. Assuming that all athletes use the same landing strategy overlooks the potential variation between different sports. This study examines kinematic differences of the triple hop test between jumping and non-jumping athletes using inertial measurement units. Differences in landing kinematics between 18 male athletes (10 handball, 8 judo) were analysed. SPM analysis identified significant differences in trunk rotation and lateral flexion during landing. Notably, judokas demonstrated distinct movement patterns, related to emphasising sport-specific mechanics compared to handballers. …

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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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In-Field Biomechanics Of Halfpipe Snowboarding: A Pilot Study, Matthias Thelen, Christian Merz, Tom Gorges, Dr. Jan-Peter Goldmann, Prof. Dr. Lars Donath, Prof. Dr. Uwe Kersting Jul 2024

In-Field Biomechanics Of Halfpipe Snowboarding: A Pilot Study, Matthias Thelen, Christian Merz, Tom Gorges, Dr. Jan-Peter Goldmann, Prof. Dr. Lars Donath, Prof. Dr. Uwe Kersting

ISBS Proceedings Archive

The aim of this pilot study is to develop a method to measure the sport-specific biomechanics of the Olympic discipline of halfpipe snowboarding. An integrated fusion approach using a global navigation satellite system, inertial measurement units, and an insole system to analyse the athlete's position, movements, and forces transmitted to the board was proposed. To test the feasibility of this method a former European Cup athlete (n=1) performed 32 jumps (16 front- and backside airs) in four runs. The method provided uninterrupted measurement over extended periods of time with minimal distortion to the athlete and plausible results (COM velocity: 5.0±0.5 …

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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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