Digital Commons Network^™

Changes In Back Squat Bar Velocity And Perceived Muscle Soreness Following A Standardised Rugby League Match Simulation, Dean Callaghan, Nathan Elsworthy, Joshua Guy, Crystal O. Kean

ISBS Proceedings Archive

This study examined changes in back squat bar velocity and perceived muscle soreness following a rugby league match simulation protocol. Twenty male rugby league players (age: 19.8 ± 0.7 yrs) were recruited for this study. Back squat bar velocity and perceived muscle soreness of the lower body were collected on four days surrounding a match simulation: -24 h (prior to match simulation), +0 h (after the match simulation), +24 h and +48 h. Compared to baseline (-24h), there were non-significant decreases in maximum (d_z=-0.50, moderate) back squat bar velocity +0 h. There was a significant increase in …

The Acute Effects Of A Grip-Constraint Tool On Upper Body And Racket Kinematics During Tennis Forehands, Nicholas Busuttil, Alexandra Roberts Dr, Marcus Dunn Dr, Kane Middleton Dr

ISBS Proceedings Archive

The purpose of this study was to compare the acute effect of a grip-constraint tool on upper body and racket kinematics during tennis single-handed forehand strokes. Upper-body and racket kinematics for two grip conditions, Preferred (self-selected) and Grip-constraint tool (fixed semi-western forehand grip) were captured for eleven tennis players using a 22-camera Vicon motion capture system (240 Hz). Using a grip-constraint tool resulted in a more closed racket face tilt (~4°) at ball impact while having variations in joint rotations across the shoulder, elbow and wrist. This possibly demonstrates the participant’s ability to self-organise compensatory angular rotations across the upper …

Correlation Between Jump Height And Biomechanical Variables In Chilean Athletes Of Team Sports, Alejandro Bustamante, Esteban Aedo-Muñoz, Paulina Fuenzalida, Hugo Cerda-Kohler, Christopher Moya-Jofre, Mauricio Araya-Ibacache, Diego Garcia De La Pastora, Magdalena Torres

ISBS Proceedings Archive

I

In elite team sports technical skills and explosiveness are essential to get the optimum performance, being the vertical jump one of the most important motor skills in competition, usually assessed by countermovement jump (CMJ). The main aim of our study is to determine the correlation between jump height and kinetic and kinematic variables using force platforms, and secondly to describe CMJ values of elite Chilean team sports athletes. The results obtained in our study showed a positive correlation between jump height and concentric mean power, concentric peak velocity, concentric peak power and total concentric impulse. These results are fundamental …

Upper Limb Joint Coordination During Round-Off In Female Gymnastics, Pavel Brtva, Franky Mulloy, Gareth Irwin, Roman Farana

ISBS Proceedings Archive

The aims of this study were to integrate the analysis of the elbow joint loading kinetics with the coordination and coordination variability across three round-off (RO) techniques (‘Parallel’, ‘Reverse’, ‘T-shape’). Twelve young female gymnasts performed 6 RO trials in each technique. Kinematic and kinetic data were collected for each trial. Statistical parametric mapping of mean elbow joint ad/abduction moments was performed to compare differences between techniques. Modified vector coding technique were used to asses coordination patterns and coordination variability (CAV). Results indicated that the combination of anti-phase coordination and lower coordination variability using ‘Reverse’ technique may explain the mechanism which …

Physical And Biomechanical Aspects That Can Influence The Preference For The Uchimata Technique In Judo: A Case Study, Lindsei Brabec, Esteban Aedo-Muñoz, Ciro-José Brito, Bianca Miarka, Alejandro Bustamante-Garrido, David Ariagada, Pablo Merino, Christopher Moya-Jofre, Hugo Cerda-Kohler, Mauricio Araya-Ibacache

ISBS Proceedings Archive

The aim of this study was to compare the handgrip strength, flexibility level (sit and reach test), kumikata and biomechanical aspects of the uchimata technique of two national level judokas, one who favors to use the uchimata (tokui-waza), and one who selects another judo technique in combat. We recorded the highest value of three attempts for handgrip strength (handgrip test), and flexibility (sit and reach); we recorded the highest value of three attempts for strength (handgrip test) and flexibility (sit and reach test); we analyzed the uchimata phases (kuzushi, tsukuri, kake and zanshi) in 3D using …

Simplifying The High-Performance Biomechanical Assessment Of High Jump Technique, Zachery Born, Molly Goldacre, Marion Mundt, Emma L. Millett, Elissa Phillips, Jacqueline Alderson

ISBS Proceedings Archive

A multitude of technical performance parameters are used to quantify high jump technique in the Australian high-performance environment, which can be time-consuming to measure and interpret. The purpose of this study was to investigate the efficacy of principal component analysis and stepwise multiple linear regression to simplify high-performance high jump biomechanical reports. Five non-intuitive principal components were derived, and three technical performance parameters (difference in knee angles during take-off contact, lean angle through hip at take-off contact, take-off foot contact time) influenced the height cleared by elite high jump athletes. This study establishes a method for simplifying high jump biomechanical …

The Relationship Between Trunk Energy Flow And Collegiate Softball Hitting Performance, Nicole Bordelon, Kyle Wasserberger, Jessica Downs Talmage, Adam R. Nebel Mat, Atc, Kenzie Friesen, Kevin Giordano, Gretchen Oliver

ISBS Proceedings Archive

The purpose of this study was to determine the relationship between trunk energy flow and performance (exit velocity) during collegiate softball hitting. Nineteen collegiate softball athletes (age: 19.6 ± 1.0yrs) performed three maximal effort swings off a pitching machine. Kinematic data were collected using an electromagnetic tracking system. A segmental power analysis was performed to quantify peak rates of trunk energy flow (proximal inflow (IF) and distal outflow (OF) on front and back sides). Regression analyses determined exit velocity was best predicted by peak rate of distal trunk energy OF on the front side. On average, the model showed exit …

Determining Relationships Between Kinematic Sequencing And Baseball Pitch Velocity Using Markerless Motion Capture, Ryan W. G. Bench, Colin D. Mckinnon, Anthony Brady, Casey Mulholland, Michael Sonne, Mike Holmes

ISBS Proceedings Archive

The purpose of this study was to determine how the timings and magnitudes of peak pelvis rotational velocity, peak trunk rotational velocity, peak elbow extension velocity, and peak shoulder internal rotation velocity affect pitch velocity. Eighty pitchers (187.2 ± 8.2cm, 89.3 ± 13.0kg, 20.1 ± 3.3yrs) had a minimum of 3 fastballs recorded and video was processed using pitchAI^TM. Average pitch velocity was 38.1 ± 2.5 m/s. A multilinear regression generated a significant prediction for pitch velocity (R² = 0.368 and p < 0.01). Pitcher weight (β = 0.535, p < 0.001), peak pelvis rotational velocity timing (β = -0.157, p = 0.001), peak elbow extension timing (β = 0.122, p = 0.006), and …

Catch It If You Can: Is The Catch Phase Overlooked In Weightlifting?, Carlos Valenzuela Barrero, Kristof Kipp

ISBS Proceedings Archive

The purpose of this study was to present a new method of dividing the phases of weightlifting exercises and describe the accompanying barbell biomechanics. Ten competitive female weightlifters performed 4 sets at intensities ranging from 85 to 100% of their previous one repetition maximum (1RM) in snatch and clean. A motion capture system was used to record 3-D barbell trajectories for all attempts. Barbell kinematic and kinetic data were compared between the pull, turnover, and catch phases of the snatch and clean. During the catch phase, the average force exerted on the bar was greater than during the other two …

Impact Of Kinematic Modification In The Underwater Undulatory Swimming Performance Of A Swimmer, Dorian A G Audot, Dominic A. Hudson Prof., Martin Warner Dr, Joseph Banks Dr

ISBS Proceedings Archive

This work is a case study observing the impact of various kinematics modifications in the simulated pressure forces and hydrodynamic work done by an athlete performing maximum effort Underwater Undulatory Swimming (UUS). The studied athlete was recorded using a Motion Capture methodology. Seven key joints were identified to represent the athlete’s motion and their position were fitted with a fourth order Fourier series. This kinematic data was then modified to reduce or amplify the upper-body and lower-body motion but also to have a linear wave propagation. The kinematics (10 in total) were inputted in an unsteady 2D Computational Fluid Dynamics …

Biomechanical Analysis Of Elite Female Rugby Place Kickers, Alexandra C. Atack, Neil Bezodis

ISBS Proceedings Archive

The purpose of this study was to investigate rugby place kicking technique of elite female players. Five International-level female place kickers took at least five maximum range place kicks, and their technique was analysed using 3D motion capture. In comparison to successful male kickers, females achieved slower kicking foot and ball velocities and shorter maximum kicking distances. Reduced extension of the support leg hip and knee joints, combined with slower centre of mass deceleration, meant that females appeared to transfer less momentum from their approach to the ball, thus, requiring them to perform more positive work at their kicking hip. …

Ball Size And Weight Effects On Throwing Kinematics And Kinetics In Youth Baseball Athletes, Charles J. Arnold, Natalie Hosmer, Miles Moore, Garrett Bullock, Kristen Nicholson

ISBS Proceedings Archive

In baseball, youth players play on smaller fields with shorter base path distance, pitching distance, and smaller mounds. Despite this, the baseball itself remains unchanged for youth athletes. This prospective cohort analyzed the kinematics and kinetics of 38 youth baseball pitchers while using modified sized and weighted baseballs. An ANOVA was used to determine statistical significance amongst ball modifications. ANOVA results show significance between the 3oz-5oz baseball with the 3oz baseball decreasing elbow varus torque. This is a preliminary study on the effects of modified baseballs on youth athletes.

A Pilot Study Of Elbow-Shoulder Coordination Patterns During 3-Point Shots In Players Of Different Skill Levels, Nayun Ahn, Kristof Kipp

ISBS Proceedings Archive

The purpose of this study was to determine shoulder and elbow coordination between different skill levels in basketball players during 3-point shots. Digital video data were collected while five players performed 3-point shots. Video data were processed with Theia3D software, and shoulder and elbow joint angles were calculated in Visual3D. Vector coding analysis was used to calculate shoulder-elbow coupling angles. The mean coupling angles and frequency counts showed anti-phase coordination with elbow dominancy during ball release phase was consistent among all players. The results highlighted that high-skilled players may adopt more efficient shoulder and elbow coordination patterns to enhance their …

Incidences Of Stiffness On Squat Jump Variables, Esteban Aedo-Muñoz, Alejandro Bustamante-Garrido, Roberto Garcés, Pablo Merino-Muñoz, Hugo Cerda-Kohler, Benjamin Rioseco, Jorge Cancino-Jiménez, Bianca Miarka, Jorge Perez-Contreras, Bárbara Arancibia-Iturbe, David Ariagada

ISBS Proceedings Archive

The purpose of this study was to relation level the stiffness of the patellar tendon and three portions of the Achilles tendon; inferior, middle, and superior location with performance variables in the squat jump. The sample was composed of 25 belonging to Chilean elite male handball players. It assesses stiffness tendinous patellar and Achilles tendon using to MyotonPro® device. During the squat jump assessment, two force platforms Pasco and ForceDecks® software for analysis. The main results were RFD 0-50 ms (r=0.611), RFD_N 0-50 ms (r=0.550), RFD 0-100 ms (r=0.615), and RFD_N 0-100 ms (r=0.624) presented a relationship with …

Principal Component Analysis Of Free Throw Shot Trajectories In Relation To Shooting Performance, William R. Adler, Kristof Kipp, Nayun Ahn

ISBS Proceedings Archive

The purpose of this study was to analyze free throw (FT) shot trajectories of individual basketball players using principal component analysis (PCA) and investigate whether variation in trajectories correlated with FT shooting performance. A markerless motion capture system was used to record three-dimensional FT shot trajectories of seven basketball players during practice. Horizontal and vertical positioning of the wrist joint center of the shooting hand were captured in both the sagittal and frontal planes for all trials. These coordinates were used as the input to the PCA. Positive correlations between the amount of variation accounted for by the first principal …

Velocity Based Strength Training: Validity Of The Apple Watch 7 To Measure Movement Velocity In The Back Squat, Basil Achermann, Katja Oberhofer, Silvio Lorenzetti

ISBS Proceedings Archive

Velocity-Based resistance Training (VBT) measurement methods based on commercially-available electronics in smartphones and other wearables are not yet accessible to the broad public. Building on this gap, the motivation for this study was to assess the validity of the Apple Watch 7 for broad application to VBT. In particular, the velocity predictions of a barbell mounted Apple Watch 7 were compared against data from 3D optical motion capture (Vicon) as gold standard in 22 subjects for the free weight back squat. The subjects reported to the lab for one testing session and performed the free weight back squat at intensities …

Isbs 2023 Conference Proceedings Title And Foreward, Kristof Kipp, Christopher Geiser, Nayun Ahn

ISBS Proceedings Archive

The ISBS is an international society totally dedicated to biomechanics in sports, whose primary purposes are:

• To provide a forum for the exchange of ideas for sports biomechanics researchers, coaches and teachers.
• To bridge the gap between researchers and practitioners.
• To gather and disseminate information and materials on biomechanics in sports.

Papers underwent a double blinded review process. Each paper in these proceedings has been reviewed by at least two members of the scientific committee.

New Directions In Health Care, 1978, V1 N2, April, Advocate Aurora Health

Historical Documents - Combined

Lutheran Hospital of Milwaukee, Milwaukee, WI: Community healthcare publication produced by Lutheran Hospital of Milwaukee, Inc. This issue is about coronary artery disease and heart health.

New Directions In Health Care, 1978, V1 N3, July, Advocate Aurora Health

Historical Documents - Combined

Lutheran Hospital of Milwaukee, Milwaukee, WI: Community healthcare publication produced by Lutheran Hospital of Milwaukee, Inc. This issue is about a case study in a total hip replacement.

Seventy-Five Years Of Milwaukee Hospital, "The Passavant", 1863-1938, Advocate Aurora Health

Historical Documents - Combined

Milwaukee Hospital, Milwaukee, WI: Booklet commemorating 75 years of history of Milwaukee Hospital written by Herman L. Fritschel. Contents include historical details on the founding of the hospital and its transition from a "Passavant Institution" to its developments and expansions from 1900-1938.

Homer: The Very Idea. By James J. Porter. Chicago And London: The University Of Chicago Press, 2021. Pp. Vii + 277. Cloth, $27.50. Isbn-13: 978-0-226-67589-3., Gabriel Gonzalez

Studies in Mediterranean Antiquity and Classics

No abstract provided.

The Desert And The Sa'alik: The Creation Of Identity In Pre-Islamic Arabia, Maya H. Saidel

Studies in Mediterranean Antiquity and Classics

The sa’alik were poets who were expelled from their tribes and occupied the fringes of society in Pre-Islamic Arabia. The brooding poetry they composed as they roamed the desert sands in solitude presents a fascinating opportunity to explore the role of the environment in constructing vagabond identity. This paper analyzes Lamiyatt al-Arab by al-Shanfara and How I Met the Ghul by Ta’abatta Sharran in order to elucidate the nature of the sa’alik’s engagement with their arid environment. In the absence of the social and physical comforts of a tribe, the sa’alik sought to integrate themselves into an alternative web of …

Queens Of The Castle: The Power Of Helen And Arete In The Odyssey, Verity C. Wray-Raabolle

Studies in Mediterranean Antiquity and Classics

Much scholarship has been dedicated to detailing the roles of women in the Odyssey, often regarding their power or lack thereof. Helen and Arete, as two high-standing queens of societies, provide an interesting case study into women’s roles in the story. This comparison project aims to open up new avenues of study for future classicists. An analysis of the interactions between these two women and their husbands and Odysseus in the original language reveals that the women wield power through their speech and stories. It is also clear that scholars have previously discounted the power of these women by characterizing …

The Dangers Of Deceit: An Analysis Of Odysseus’ Lie To Laertes In The Odyssey Book 24, Caitlin M. Panos

Studies in Mediterranean Antiquity and Classics

Although many scholars claim that the general function of lying in the Odyssey is to establish oneself as intellectually superior, this assertion fails to recognize the ethical lessons presented through situations with deception. In this paper, I analyze cases of Odysseus’ deceit in the Odyssey and compare these to his lie to Laertes in Book 24 to demonstrate the potential moral dangers associated with lying. Through analysis of the situational context of the lies, the content presented in each lie, and the consequences of the deceit, I argue that the lie to Laertes can be used as evidence that lying …

Gods, Society, And Gender: How Athena And Penelope Aid Odysseus' Homecoming, Gabriel Gonzalez

Studies in Mediterranean Antiquity and Classics

While Odysseus is praised for fulfilling his homecoming duties, the individuals who helped him get there are often minimized Specifically, the positive impact of women on Odysseus homecoming is overlooked and is a source of confusion. As the role of women in the Odyssey is debated, Odysseus is depicted as hero bearing wit, intelligence, and nerve. After responding directly to a few prevalent interpretations of Penelope, I argue that Penelope is a character who is faithful and loyal to Odysseus and his estate while emphasizing Athena as the divine character who aligns the conditions for Odysseus return. This paper's response …

Rhetorical Dominance: How Homeric Dialogue Defines Characterization, Ian S. Wanger

Studies in Mediterranean Antiquity and Classics

The importance and social power of a character in the Odyssey can be defined by their dialogue. Characters who display tact and strategy when speaking to others are often much more successful in their goals than those who are blunt or careless. There are scenes wherein characters noticeably gain these skills, such as the conversation between Telemachus and Athena, as well as scenes where characters engage in rhetorical “combat,” seen in Calypso’s farewell to Odysseus. By examining the dialogue between characters in these scenes, we can see clearly how a character’s rhetorical strength directly correlates with their importance and role …

Homer's Dream Guy: An Exploration Of Masculinity And Honor In The Odyssey, Beatrice K. Mellsop

Studies in Mediterranean Antiquity and Classics

The Odyssey is a story exploring what it means to be a good man–and what happens to those who aren't. In this paper, I argue that ideal masculinity in the Odyssey is defined by restraint, self-control, and one's leadership and guardianship abilities. Most men in the Odyssey fall short of this ideal, and often suffer as a result. Only Nestor, king of Pylos, is able to meet this standard and act as a role model for Telemachus. By examining the usage of certain Greek words and phrases in the text, I explore the relationship between recklessness, lack of leadership, and …

The Role Of English Language Courses In Media Colleges In Providing Their Graduates With Labor Market Skills: An Applied Study On Graduates Of Middle East University, Mazen Al-Fedawi

The study aimed to identify the degree of contribution of English language courses in providing graduates with the necessary skills by achieving the specifications of the graduate of the Faculty of Mass Communication required in the labor market, and the degree of their acquisition of the professional skills required in the labor market. It also aimed to explore whether there are differences between the acquisition of labor market skills among graduates of mass media faculties due to variables, type of specialization, number of years of work, and gender. The study achieved these objectives through an applied survey study on an …

Skills That Help Employ Media Graduates In The Labor Market From The Point Of View Of Practicing Media Professionals., Mahmoud Al-Rajabi

The study aimed to reveal the most important skills that help to employ graduates of media faculties in the labor market from the point of view of media practitioners. The study used two approaches, the qualitative methodology and the inductive approach, by conducting in-depth interviews with seventeen media practitioners in Jordan, and the sample was taken in an intentional way. The results of the study showed that the skills that a media graduate should possess are both pure media skills and other skills such as research skills, critical thinking skills, content building skills, interpersonal skills, Arabic and media language skills, …

The Role Of Practical Courses In The Faculty Of Media At The Middle East University In Providing Graduates With Labor Market Skills, Ahmad Oreqat, Ramez Abuhasirah

The study aimed at identifying the role of the practical courses at the Faculty of Media at the Middle East University in providing its graduates with skills in the media labor market. The study adopted the media audience survey method. A questionnaire was distributed to an available sample of (48) graduates of the Faculty of Media at Middle East University who practice the media profession. The results showed that practical study courses’ contribution to providing graduates with the required specifications in the labor market came to a high degree, as the most important of these specifications were: “decent and acceptable …