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Relationship Between Swimming Velocity And Foot Kinematic Characteristics In Novice Breaststroke Swimmers, Hiroshi Suito, Keisuke Teramoto, Kazumasa Ozeki Nov 2025

Relationship Between Swimming Velocity And Foot Kinematic Characteristics In Novice Breaststroke Swimmers, Hiroshi Suito, Keisuke Teramoto, Kazumasa Ozeki

ISBS Proceedings Archive

The study aimed to examine the relationship between the swimming velocity (SV) and the kinematic characteristics of the foot in novice breaststroke swimmers. Six novice male swimmers participated in the study. Participants performed two prone 10 m breaststroke kick trials on a kickboard. The kicking movements were recorded with two synchronized underwater cameras, and a three-dimensional analysis of the right-side kicking motion was conducted. The results revealed that significant negative correlations were found between the SV during a single breaststroke kick cycle and both the longitudinal and lateral kick widths (r = -.943, P < 0.01; r = -.886, P < 0.05). Moreover, a significant correlation was observed between the internal rotation angle of ankle joint in the insweep phase and SV (r = .886, P < 0.05), These findings suggest …

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Differences In Backswing Mechanics Between Professional And Amateur Golfers, Bobae Song, Minji Kim, Sejin Kong, Jaejin Ryue, Ki-Kwang Lee Nov 2025

Differences In Backswing Mechanics Between Professional And Amateur Golfers, Bobae Song, Minji Kim, Sejin Kong, Jaejin Ryue, Ki-Kwang Lee

ISBS Proceedings Archive

The purpose of this study was to investigate the swing mechanics of professional and amateur female golfers by analyzing biomechanical differences in their driver backswing. Motion capture and force plates were used to collect backswing data from 12 professionals and 12 amateurs. The backswing was segmented into five key events for analysis. Compared to amateur golfers, professional golfers generated greater horizontal ground reaction forces (Left Leg GRF X at MB: 5.12 ± 2.04 vs. 3.52 ± 1.43 %BW; BT: -6.97 ± 3.31 vs. -4.13 ± 2.91 %BW; Right Leg GRF X at BT: 10.52 ± 4.00 vs. 4.97 ± 3.04 …

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Running-Induced Fatigue Increases Coordination Variability, Regardless Of Running Ability, Zak J.M Sheehy, Adrian R Rivadulla, Ezio Preatoni Nov 2025

Running-Induced Fatigue Increases Coordination Variability, Regardless Of Running Ability, Zak J.M Sheehy, Adrian R Rivadulla, Ezio Preatoni

ISBS Proceedings Archive

We examined the effect of fatigue on lower limb coordination variability (CV) and its relationship with running ability. Fifty recreational runners (♀= 25; 18-50 years) ran on a treadmill, at a speed 5% faster than their lactate threshold, until volitional exhaustion. Three-dimensional kinematic data were collected, and CV for sagittal hip-knee and knee-ankle couplings was calculated. One-dimensional repeated measures analysis via Statistical Parametric Mapping (SPM) revealed that CV increased in mid-stance and throughout swing in the final part of the run. Changes in CV were not predicted by VO2peak or 10 km performance, suggesting that the findings are …

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Effect Of Hallux Valgus On Lower Extremity Kinematics During Ballet Movements, Nahoko Sato, Haruka Seki, Naoko Oba, Akito Miura Nov 2025

Effect Of Hallux Valgus On Lower Extremity Kinematics During Ballet Movements, Nahoko Sato, Haruka Seki, Naoko Oba, Akito Miura

ISBS Proceedings Archive

This study aimed to identify the specific motion characteristics associated with hallux valgus angles. Fourteen ballet dancers with hallux valgus performed the following three ballet movements in the 1st position: 1) standing for 5 seconds, 2) demi plié, and 3) sauté. Their movements were captured at 100 Hz using a motion-capture system. The relationship between the hallux valgus and foot joint angles, calculated using the multi-segment foot model, was tested using Pearson's correlation coefficient. Dancers with large hallux valgus angles demonstrated inferior displacement of the midfoot in all three tasks. It was also observed that the knees were valgus in …

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Effects Of Lower Limb Ballistic Training On Leg Kicking And Overall Performance In Swimming: Case Study, Ayman W. Sadek, Paul Grimshaw Nov 2025

Effects Of Lower Limb Ballistic Training On Leg Kicking And Overall Performance In Swimming: Case Study, Ayman W. Sadek, Paul Grimshaw

ISBS Proceedings Archive

This case study aimed to investigate the effects of a lower limb ballistic training program on lower body strength, front crawl flutter kick performance, and sprint swimming performance over 50 meters in a male recreational swimmer. One participant was recruited, and completed a 6-week training program, with pre- and post-tests assessing 50 m front crawl sprint time, 25 m flutter kick sprint time, stroke length (SL), one-repetition maximum (1-RM) squat, and countermovement jump (CMJ) performance. The participant showed improvements in the swimming performance and in SL, as well as some CMJ variables. However, no inferential statistics was conducted due to …

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A Study On Mechanical Changes During The Middle Phase Of The Long Jump Approach Run, Ankur Jyoti Phukon, Krishnendu Dhar Nov 2025

A Study On Mechanical Changes During The Middle Phase Of The Long Jump Approach Run, Ankur Jyoti Phukon, Krishnendu Dhar

ISBS Proceedings Archive

This study investigated the mechanical adjustments made by elite long jumpers during the middle phase of the approach run. Kinematic data from the 5 senior Indian national level long jumpers (Personal Best:7.83±0.63m) with five high speed cameras (at resolution 1920s1080 with 120 frame per second). Further all the motion were quantified with Quintic (v.33). It was revealed that athletes maintained consistent step lengths while introducing subtle variations to manage velocity effectively. Study observed, some changes in torso touch-down angles; especially at 4LS were observed, indicating conscious efforts to optimize control without sacrificing step length. Contact duration (CD) varied across individuals, …

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Drop Jumping From Different Heights: What And When It Is Different In The Case Where Jump Height Is Similar?, Vassilios Panoutsakopoulos Phd, Christos Chalitsios Phd, Iraklis A. Kollias Phd Nov 2025

Drop Jumping From Different Heights: What And When It Is Different In The Case Where Jump Height Is Similar?, Vassilios Panoutsakopoulos Phd, Christos Chalitsios Phd, Iraklis A. Kollias Phd

ISBS Proceedings Archive

The purpose of this study was to identify possible differences in both descriptive (0-D) and one-dimensional (1-D) kinetic and kinematic parameters in cases where jump height is similar among drop jumps (DJ) from different heights. Volleyball players (n = 10) executed DJs from 20, 40, and 60 cm. Differences in the kinetic and kinematic parameters acquired from force-plates and video-recordings were examined in DJs with same jump height across the drop heights. Results indicated that larger (p < .05) work and braking phase power were observed in DJ60 than DJ20 and DJ40. In addition, differences (p < .05) were observed in the time curves at approximately the first 20% of ground contact time, mainly between DJ20 and DJ60. The ability to adjust to the impact parameters results in the same jump outcome in DJs from different drop heights.

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Prediction Of Anterio-Posterior And Medio-Lateral Force From Vertical Force In Different Frequency Of Movement Pattern, Rajinikumar Palaniyappan Dr., Hema D Ms., Tamil Selvan P Mr. Nov 2025

Prediction Of Anterio-Posterior And Medio-Lateral Force From Vertical Force In Different Frequency Of Movement Pattern, Rajinikumar Palaniyappan Dr., Hema D Ms., Tamil Selvan P Mr.

ISBS Proceedings Archive

Ground reaction forces (GRFs) are essential in human motion analysis for understanding biomechanics in sports and rehabilitation. While vertical GRFs (VGRFs) are commonly studied due to ease of measurement, their relationship with horizontal forces (anteroposterior and mediolateral) across different movement speeds remains unclear. This study aimed to predict horizontal forces from VGRFs during walking, jogging, running, and sprinting. The three Kistler force plates and the force data were collected from 60 male intercollegiate athletes (ages 18 - 25) over a 30-meter path. Pearson correlation and linear regression revealed significant correlations between VGRF and both braking and propulsive forces (y-axis), as …

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The Effect Of (Acceleration-Deceleration) Exercise Whith Moderate Intensity In Small Spaces On The Strength Of Hamstrings In Football Players, Kamel Nettah, Abdelkader Belkheir, Rabah Seghiri, Derradji Aroussi Nov 2025

The Effect Of (Acceleration-Deceleration) Exercise Whith Moderate Intensity In Small Spaces On The Strength Of Hamstrings In Football Players, Kamel Nettah, Abdelkader Belkheir, Rabah Seghiri, Derradji Aroussi

ISBS Proceedings Archive

The purpose of this study is to examine the effect of acceleration-deceleration exercise in small spaces on the strength of the hamstring muscle and ideally prevent it from a possible injury. A significant number of previous studies have shown that the negative effect of exercises using acceleration and deceleration on hamstring injury is due to the maximum use of intensity. Instead, in this study we have used moderate intensity in small spaces. on The idea was that acceleration-deceleration exercises have the same mechanism of contraction(contracting and extending) with strength training despite the different way they function, and through that development …

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Biomechanical Analysis Of Elite Javelin Thrower Of Pakistan, Muhammad Tahir Nazeer Dr, Muhammad Ahmad Tahir, Rabia Walee Nov 2025

Biomechanical Analysis Of Elite Javelin Thrower Of Pakistan, Muhammad Tahir Nazeer Dr, Muhammad Ahmad Tahir, Rabia Walee

ISBS Proceedings Archive

This study investigated the biomechanical factors influencing javelin throwing performance among elite Pakistani athletes. Eight national-level male throwers were analyzed using 3D motion capture during the 2024 National Athletics Championships. Key variables included release velocity components, approach run velocity, pull distance, and phase durations. Results showed that vertical release velocity and approach run velocity at right foot touchdown (R-on) were significantly correlated with throwing distance (r = 0.672, p < .05 and r = 0.596, p < .05, respectively). No significant correlations were observed for pull distance, step length, or phase durations. Findings suggest that elite performance relies on maximizing vertical release while maintaining sufficient horizontal speed, emphasizing the importance of individualized technical training in Pakistan’s javelin development programs.

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Development Of Sprint Running Performance Over 4 Years: A Case Study, Ryu Nagahara, Masataka Yamashita Nov 2025

Development Of Sprint Running Performance Over 4 Years: A Case Study, Ryu Nagahara, Masataka Yamashita

ISBS Proceedings Archive

The purpose of this study was to identify changes in the kinematics and kinetics of sprinting through the development of sprint performance in a male sprinter over four years. In the experiment, a male sprinter performed a 60-m sprint during which ground reaction forces and running motion were measured using a long force platform system and a motion capture system, respectively. The participant improved his 200-m personal record by 1.17 s over the four years. The characteristics of changes in the kinematics and kinetics of sprinting varied across the years. A decrease in knee extension torque during the support phase …

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Joint Power Differences In Speed Running Between American Style Football Position Groups, Monique Mokha, Alyana Andal Andal, Jacob Haberer, Isabella Estrada Hernandez, Hunter Forte Nov 2025

Joint Power Differences In Speed Running Between American Style Football Position Groups, Monique Mokha, Alyana Andal Andal, Jacob Haberer, Isabella Estrada Hernandez, Hunter Forte

ISBS Proceedings Archive

We tested lower limb joint power during a treadmill run of 54 American style football players preparing for league try-outs where 40-yard (36.6 m) dash performance is critical. Players represented 3 position groups: Big (e.g., linemen), Big skill (e.g., tight ends), and Skill (e.g., receivers) groups, reflecting their varying play demands, from blocking/tackling to sprinting/cutting. MANOVA showed significant group differences in joint power, F(24,80) = 2.917, p < .001; Wilk’s λ = .285, partial η² = .467. ANOVA and post-hocs revealed Skill players generated more total limb power than Big (p < .001) and absorbed more ankle power than Big (p < .001), but not Big skill (p > .017). Big absorbed more right hip power than …

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Wearable Technology Detects Altered Cod Strategies In Football Players Post-Aclr Without Impacting Completion Time., Joao Marques Nov 2025

Wearable Technology Detects Altered Cod Strategies In Football Players Post-Aclr Without Impacting Completion Time., Joao Marques

ISBS Proceedings Archive

This study examines COD performance and biomechanics in professional football players with a history of ACLR compared to healthy controls, using wearable technology. Kinematics and vertical force were recorded during 90° side-step cutting. Mixed model analysis and Statistical Parametric Mapping compared COD completion time, kinetics, and kinematics between limbs and groups. No significant differences were found in COD time between limbs (p = 0.52) or groups (p = 0.65). However, the involved limb showed greater ankle dorsiflexion and lower vertical force during the penultimate contact (p = 0.002). The involved limb also showed lower knee flexion angles during the plant …

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Differences In Trunk And Hip Isokinetic Strength Performance Among Cheerleaders With Varying Somersault Technical Levels, Yi-Zhu Liao, Shih-Chung Cheng, Wen-Tzu Tang Nov 2025

Differences In Trunk And Hip Isokinetic Strength Performance Among Cheerleaders With Varying Somersault Technical Levels, Yi-Zhu Liao, Shih-Chung Cheng, Wen-Tzu Tang

ISBS Proceedings Archive

啦啦隊中的站立後空翻 (SBTS) 需要精確的速度控制和軀幹-臀部協調，並依靠特定肌肉的力量。雖然 SBTS 通常可以實現，但更高級的站立全空翻 (SF) 需要更大的力量。這項研究評估了 17 名啦啦隊在 3 種不同速度（軀幹：30-120°/s；臀部：60-300°/s）下的軀幹和臀部等速力量。參與者根據技能分組：僅 SBTS（NSF，n = 9）和同時進行 SBTS 和 SF（SF，n = 8）。雙向變異數分析顯示 SF 組的髖部屈曲峰值扭矩明顯較大（p < .05）。髖部伸展的顯著交互作用顯示 NSF 中 300°/s 和 180°/s 時的扭矩下降（p < .05），而在 SF 中沒有觀察到。研究結果強調了強大的髖屈肌和保持高速髖伸展對於空翻動作的重要性，為有針對性的啦啦隊訓練提供了指導。

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Effect Of Hamstring Strength Intervention On Lower Extremity Biomechanics Of Sprinting, Shangxiao Li, Weiya Hao, Shufang Yuan Nov 2025

Effect Of Hamstring Strength Intervention On Lower Extremity Biomechanics Of Sprinting, Shangxiao Li, Weiya Hao, Shufang Yuan

ISBS Proceedings Archive

The purpose of this study was to examine the effects of hamstring strength intervention on the lower extremity biomechanics. Fourteen college students volunteered to participate in this study, and underwent three weekly sessions of hamstring strength intervention for eight weeks. Three-dimensional kinematic and kinetic data during a sprint test (40 m) were collected before and after the intervention. The hip flexion angle, knee flexion angle at touch down and peak knee flexion angle instant, and peak knee extension moment during stance phase showed significant decreases in the post-intervention test compared to the pre-intervention test. The hip and knee joints were …

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Shoulder Kinematics Of Overhead Throwing In Male Professional And Semi-Professional Cricketers, Jordan Leondiris Mr., Janine Gray Dr., Megan Dutton Dr., Yumna Albertus Associate Prof. Nov 2025

Shoulder Kinematics Of Overhead Throwing In Male Professional And Semi-Professional Cricketers, Jordan Leondiris Mr., Janine Gray Dr., Megan Dutton Dr., Yumna Albertus Associate Prof.

ISBS Proceedings Archive

Throwing in sports is one of the most aggressive and vigorous actions performed by the upper extremity. The purpose of this study was to investigate overhead throwing shoulder kinematics between two different throwing approaches in cricket, throwing from a static versus dynamic position following a run-up. The study sample included twenty (N=20) male professional/semi-professional cricketers. Shoulder kinematic variables were investigated during two different throwing approaches. Dynamic throwing produced significantly greater ball velocity than static throwing. However, shoulder internal rotation velocities at ball release showed no significant differences across static versus dynamic conditions and shoulder kinematics remained largely consistent, except for …

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The Effect Of Augmented Reality Glasses On Elderly And Young Adults – A Preliminary Study, Sangyup Lee, Melissa Mache, Chengtu Hsieh Nov 2025

The Effect Of Augmented Reality Glasses On Elderly And Young Adults – A Preliminary Study, Sangyup Lee, Melissa Mache, Chengtu Hsieh

ISBS Proceedings Archive

Falls are a major concern among older adults, often linked to gait adaptations influenced by aging and environmental factors. This study examined the effects of augmented reality (AR) glasses on gait in young and older adults under three conditions: walking without AR glasses (W/O), with AR glasses (AR), and with AR glasses while performing a cognitive task (AR + CQ). Twelve participants (six younger, six older) walked on a treadmill at their preferred speed while gait was analysed using OpenCap. Compared to younger adults, older adults exhibited shorter stride length and narrower step width under AR conditions. Younger adults showed …

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A Pilot Study To Evaluate Sagittal Kinematic Variables In Accelerated Run Using Openpose Markerless Motion Capture System, Mizuki Kitamura, Mitsuo Otsuka Nov 2025

A Pilot Study To Evaluate Sagittal Kinematic Variables In Accelerated Run Using Openpose Markerless Motion Capture System, Mizuki Kitamura, Mitsuo Otsuka

ISBS Proceedings Archive

This study evaluated the agreement between OpenPose markerless and marker-based methods in analyzing sprint start performance. Four male students performed ten sprint starts. The Bland-Altman test for average center of mass (COM) horizontal velocity from the beginning motion to 1-m position of the OpenPose markerless method showed a fixed bias of -0.02 m/s, 95% limits of agreement (LoA) from −0.10 to 0.06 m/s, and a proportional bias of r = −0.47. For the 1-m running time, fixed bias was −0.00 s, 95% LoA ranged from −0.09 to 0.09 s, and proportional bias was r = 0.39. In the calculation of …

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Characterizing Cardiac-Locomotion Synchronization And Heart Rate/Gait Cycle Fluctuations: A Pilot Study, Minato Kawaguchi, Kousuke Meguro, Kentaro Takahashi Nov 2025

Characterizing Cardiac-Locomotion Synchronization And Heart Rate/Gait Cycle Fluctuations: A Pilot Study, Minato Kawaguchi, Kousuke Meguro, Kentaro Takahashi

ISBS Proceedings Archive

This study investigated cardiac-locomotion synchronization (CLS) during indoor treadmill and outdoor free walking, examining its environmental differences and relationships with heart rate/gait rhythm variability. Twelve participants used wearable ECG and accelerometer sensors for data collection during self-paced brisk walking. We analysed the last 10 minutes of stable walking, calculating mean period, coefficient of variation, and detrended fluctuation analysis (DFA) slope α. CLS was quantified by the 'Sync rate', the temporal proportion of consistent gait cycle to R-R interval ratios. Results showed significantly higher Sync rates in outdoor walking. Outdoor gait rhythm fluctuation α tended to decrease with increased Sync rate. …

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Comparison Of Thorax And Pelvis Motion During Iron Club Golf Swing Between Female And Male Skilled Golfers, Karolina Kanova, Jiri Skypala, Pavel Brtva, Roman Farana Nov 2025

Comparison Of Thorax And Pelvis Motion During Iron Club Golf Swing Between Female And Male Skilled Golfers, Karolina Kanova, Jiri Skypala, Pavel Brtva, Roman Farana

ISBS Proceedings Archive

This study compared thorax and pelvis biomechanics in male and female golfers using an iron club, analysing eight skilled golfers (4 female, 4 male) with over 10 years of experience and a handicap below 10. The aim was to compare the biomechanics and movement variability of thorax and pelvis motion during the golf swing between genders. Biomechanical analysis was conducted using a combination of marker-based and markerless motion capture systems, focusing on the downswing. Results showed gender- based differences in 3D angular displacement, with significant movement variability in pelvic lateral tilt across all downswing phases (top of backswing, mid-downswing, and …

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The Stability Of Variability – Multiday Reliability Of Sample Entropy In Submaximal Hop And Strength Tasks In Elite Athletes, Daniel Kadlec, Jake Cowin, Kat Daniels, Matthew J Jordan, Matt Miller-Dicks, Shayne Vial, Sophia Nimphius Nov 2025

The Stability Of Variability – Multiday Reliability Of Sample Entropy In Submaximal Hop And Strength Tasks In Elite Athletes, Daniel Kadlec, Jake Cowin, Kat Daniels, Matthew J Jordan, Matt Miller-Dicks, Shayne Vial, Sophia Nimphius

ISBS Proceedings Archive

The purpose of this study was to determine the multiday reliability in submaximal continuous hops and submaximal isometric squats from the ground reaction force signals. Twelve elite team-sport athletes completed submaximal isometric squats at 40% and 60% of their maximal voluntary isometric contraction and submaximal continuous hopping at 2 Hz, 2.5 Hz, and a self-selected frequency for 30 s, respectively, over four sessions. Sample entropy was calculated from the force-time data. Good-to-excellent reliability (ICC2,k > 0.75) was observed for submaximal hopping frequencies (Hop2.0, Hop2.5) following one session and for isometric squats at 60% MVIC from the initial session. These data …

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Simulating The Effect Of Measurement Error On Stride Time Detrended Fluctuation Analysis, Ben D. M. Jones, David L. Carey, Jon Wheat, Kane Middleton, Ben Heller Nov 2025

Simulating The Effect Of Measurement Error On Stride Time Detrended Fluctuation Analysis, Ben D. M. Jones, David L. Carey, Jon Wheat, Kane Middleton, Ben Heller

ISBS Proceedings Archive

The aim of this study was to investigate the sensitivity of running stride time detrended fluctuation analysis (DFA) to simulated noise and the impact of noise on reliability measures. Varying magnitudes of Gaussian and uniform noise were added to series of touchdown event timings from 11 runners. DFA-α were calculated for ground truth and simulated stride time series. Simulated series were paired and test-retest ICC estimates computed. The error in DFA-α increased with noise magnitude, with stride time series transitioning from persistent to anti-persistent behaviour for greater magnitudes of noise. However, median ICC estimates stayed above 0.95 for all standard …

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The Relationship Between Vertical Jump Height And Residual Force Depression In Knee Extensors, Iseul Jo, Hae-Dong Lee Nov 2025

The Relationship Between Vertical Jump Height And Residual Force Depression In Knee Extensors, Iseul Jo, Hae-Dong Lee

ISBS Proceedings Archive

This study investigated the relationship between vertical jump performance and history-dependent muscle force depression. Maximum isometric knee extension torque was measured following a stretch-shortening cycle (SSC) or shortening-only (SHO) contraction and compared to a reference isometric contraction (ISO) at 20°. Residual force depression (rFD) was observed as 14.5% after SSC and 4.9% after SHO. Squat jump (SJ) height was positively correlated with peak concentric torque in the SHO–ISO condition, whereas countermovement jump (CMJ) height showed no significant relationship. Both jump heights showed strong positive correlations with rFD, suggesting that individuals with greater rFD tended to achieve higher jump performance. These …

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Theoretical Analysis Of The Addition Effect Of Knee Flexion And Extension Movement Of The Swinging Leg On Horizontal Velocity In Men-Uchi: Comparison With Experimental Data, Shunngo Itai, Nobuyuki Sakai, Toshiyuki Kurihara Nov 2025

Theoretical Analysis Of The Addition Effect Of Knee Flexion And Extension Movement Of The Swinging Leg On Horizontal Velocity In Men-Uchi: Comparison With Experimental Data, Shunngo Itai, Nobuyuki Sakai, Toshiyuki Kurihara

ISBS Proceedings Archive

剣道は日本の伝統武道一つであり、最も基本的な技は面打ちである。 この動作において踏み出し足となる右足の動作に関する研究はほとんど行われていない。 本研究は、右膝の適切な屈曲のタイミングと角度を見極めることを目的とする。体験者3名が面打ち動作の測定のために採用され、右膝の角度と両足の間の角度が測定された。

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Validity Of A Velocity-Based Training Device For Assessing Peak Force, Velocity, And Power In Medicine Ball Throws: A Pilot Study, Kazuhiro Ishimura Nov 2025

Validity Of A Velocity-Based Training Device For Assessing Peak Force, Velocity, And Power In Medicine Ball Throws: A Pilot Study, Kazuhiro Ishimura

ISBS Proceedings Archive

This pilot study examined the validity of a wearable VBT device for measuring peak velocity, force, and power during vertical medicine ball throws. Two participants each performed nine throws while wearing the device, and a single high-speed camera tracked only the medicine ball. Velocity and power were computed from ball position using video-based analysis. The VBT device showed strong correlations for velocity (r = 0.945, bias = –2.01 ± 1.17 m/s) and force (r = 0.969, bias = –64.16 ± 28.31 N), but power showed a weak correlation (r = 0.150, bias = 277.8 ± 337.1 W) and high variability. …

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Neuromuscular And Muscle Morphological Advantage Of Power-Trained Athletes Improves Hip Extension Torque At High Velocities, Andras Hegyi, Luca Mezei, Fabien Leboeuf, Annamaria Peter, Aurélie Sarcher, Antoine Nordez, Giuseppe Rabita, Gaël Guilhem, Lilian Lacourpaille Nov 2025

Neuromuscular And Muscle Morphological Advantage Of Power-Trained Athletes Improves Hip Extension Torque At High Velocities, Andras Hegyi, Luca Mezei, Fabien Leboeuf, Annamaria Peter, Aurélie Sarcher, Antoine Nordez, Giuseppe Rabita, Gaël Guilhem, Lilian Lacourpaille

ISBS Proceedings Archive

The purpose of this study was to examine the intermuscular distribution of hamstring muscle volume, muscle excitation, and torque production capacity of hip extensors in power-trained (sprint-based) athletes compared to a strength-trained control group. We found higher semitendinosus volume in the power-trained group. The electromyography activity increased with increasing contraction velocity only in the power-trained group, with significant between-group differences observed in the semitendinosus and biceps femoris at high velocity hip extension. Power-trained athletes were stronger during concentric contractions, particularly at high contraction velocities. These results explain possible morphological and neuromuscular mechanisms to increase propulsive force in high-speed running, which …

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The Effect Of Changing Depth And Speed On Ground Reaction Forces During Squat, Ihsen M. Hamed, Hafiz H. Abdalla, Rony Ibrahim Nov 2025

The Effect Of Changing Depth And Speed On Ground Reaction Forces During Squat, Ihsen M. Hamed, Hafiz H. Abdalla, Rony Ibrahim

ISBS Proceedings Archive

This study examined the combined effects of squat depth and speed on three-dimensional ground reaction force (GRF) patterns during bodyweight squats in 18 male participants. Imposed speed squats were about twice as fast as preferred speed, and peak knee flexion increased with depth: 99° (partial), 115° (half), and 130° (full). GRFs were measured with dual force plates and analyzed using one-dimensional statistical parametric mapping two-way repeated measures ANOVA. Slow-paced squats generated higher GRFs at the beginning and end of the movement, whereas fast tempo squats yielded a sharper vertical GRF during the bottom transition phase. Squat depth primarily affected horizontal …

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Are On-Field Peak Patellar Tendon Force Estimations From Kinematics And Kinetics Viable? An Exploratory Analysis, Michiel Hagen, Jasper Verheul, Wouter Meynendonckx, Simran Chandani, Yoni Dochez, Margot Vanpachtenbeke, Danilo Santos Catelli, Sabine Verschueren, Jos Vanrenterghem Nov 2025

Are On-Field Peak Patellar Tendon Force Estimations From Kinematics And Kinetics Viable? An Exploratory Analysis, Michiel Hagen, Jasper Verheul, Wouter Meynendonckx, Simran Chandani, Yoni Dochez, Margot Vanpachtenbeke, Danilo Santos Catelli, Sabine Verschueren, Jos Vanrenterghem

ISBS Proceedings Archive

The objective of this study was to explore the potential of peak patellar tendon force estimations across a broad variety of physical exercises based on sagittal plane kinematic and kinetic parameters. Seven patients with patellar tendinopathy and seven healthy individuals performed 24 exercises. Peak patellar tendon forces were calculated through advanced musculoskeletal modelling. Four relevant exercise categories were identified: (1) squats / lunges / step downs, (2) jumping / hopping push-off, (3) jumping / hopping landing and (4) jumping / hopping plyometric. The adjusted R2 values of the regression analyses from kinematic data alone varied between 0.177 and 0.601 …

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Sex-Related Differences In Trail Running Biomechanics: A Field Study, Matteo Genitrini, Stephanie Moore, Hermann Schwameder Nov 2025

Sex-Related Differences In Trail Running Biomechanics: A Field Study, Matteo Genitrini, Stephanie Moore, Hermann Schwameder

ISBS Proceedings Archive

Trail running is an emergent endurance discipline. The aim of this work was to compare male and female trail runners for biomechanics in a field study. This would contribute to design more sex-specific training protocols. Fourteen participants carried out a trail running test wearing a full body motion capture system. In uphill sections, male athletes showed longer stride length, resulting from more effective trunk kinematics and hip-trunk coordination. In downhill sections, female athletes showed a more efficient hip-knee coordination pattern, resulting in better safety. To improve performance and mitigate risk of falls, females may focus on reducing trunk range of …

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Machine Learning And Deep Learning Applications In Sports Biomechanical Analysis: A Systematic Scoping Review Of Performance Enhancement And Injury Prevention Strategies, Wissem Dhahbi, Nidhal Jebabli, Manar Boujabli, Marouen Souaifi, Ismail Dergaa, Lamia Ben Ezzdine Nov 2025

Machine Learning And Deep Learning Applications In Sports Biomechanical Analysis: A Systematic Scoping Review Of Performance Enhancement And Injury Prevention Strategies, Wissem Dhahbi, Nidhal Jebabli, Manar Boujabli, Marouen Souaifi, Ismail Dergaa, Lamia Ben Ezzdine

ISBS Proceedings Archive

Aim: This scoping review systematically maps current trends in artificial intelligence applications for sports biomechanical analysis, examining performance enhancement and injury prevention utility, methodological approaches, implementation challenges, and ethical considerations. Methods: A comprehensive analysis synthesized evidence on AI methodologies applied to sports biomechanics across various contexts, including machine learning, neural networks, and deep learning approaches integrated with learning management systems. This review examined data collection modes, analytical approaches, and practical implementation in laboratory and field settings. Results: AI applications evolved from basic statistical modeling to sophisticated machine learning configurations, demonstrating superior performance in technique analysis (94% agreement with international judges), …

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