Medicine and Health Sciences Commons^™

Joint Angle Calculations Using Motion Capture And Deep Learning Pose Estimation While Running, Luke Vankeersbilck, Isaac Hedengren, Mcgyver Clark, Iain Hunter

International Journal of Exercise Science: Conference Proceedings

Marker based motion capture is currently the most accurate method of measuring human kinematics; however, it is expensive and is often limited to lab environments making it unsuitable for many applications. Two-dimensional methods are available through open source code, but it is unclear which of these methods provides the greatest accuracy. PURPOSE: The purpose of this study is to quantify the accuracy of pose estimation from a monocular electro-optical sensor with deep learning to infer segment end points and pose estimation utilizing two open-source code approaches. METHODS: One subject ran at 6.5 m/s for 15 s while being …

Make Reading Fun: Implications Of Virtual Reality On Standing Balance And Control, Makena Savola, Belle Ponce De Leon, Amanda Duben, Wendy T. Pham, Joshua Vicente, Jacob Hinkel-Lipsker

International Journal of Exercise Science: Conference Proceedings

The recent rapid expansion of virtual reality (VR) technology is driving a widespread number of new applications, including providing immersive environments for users to learn and read through commercially-available applications. However, recent research has shown that VR causes symptoms of dizziness and motion sickness, which could disrupt users gait and balance. Thus, it is important to understand how to best mitigate these effects before VR use becomes more widespread across the lay public. PURPOSE: The purpose of this study was to determine the acute effect of VR use on gait and balance control following use, and whether aspects of virtual …

The Relationship Between Concussion History And Lower Extremity Biomechanics During A Land And Cut Task, Nghi Gia Vu, Warren Forbes, Jason M. Avedesian, Janet S. Dufek

International Journal of Exercise Science: Conference Proceedings

In high impact landing tasks, athletes with a history of sports related concussion (SRC) have been found to demonstrate lower extremity (LE) biomechanics that are associated with elevated injury risk. However, the exact relationships between SRC history and LE biomechanics are inconclusive. PURPOSE: The purpose of this study was to investigate the relationship between SRC history and LE biomechanics during a cutting task. METHODS: A cohort of athletes with a history of SRC (n=20) and a control group of healthy athletes (n=20) were recruited for this study. The control group were matched by age, sex, and sport. Athletes …

Just Bust A Move; Relating Subjective Evaluation To Objective Measurements In Hip – Hop Dance, Joshua A. Vicente, Belle P. Ponce De Leon, Makena Savola, Rabbani Nzeza, Summer Diaz, Wendy Pham, Thomas (Rex) Ruswick, Dr. Jacob Hinkel-Lipsker

International Journal of Exercise Science: Conference Proceedings

Being globally recognized as a performance art and mode of expression, Hip - hop dance is becoming more prevalent in today’s modern dance and popular culture. With multiple renditions across the globe on what encompasses Hip - hop dance on various social media platforms and the different sub styles of hip-hop dance that currently exist, there are a limited number of ways to assess a dancer and their ability without relying on a high amount of subjectivity from those that are watching it. PURPOSE: To investigate the relationship between common dance moves (like the Arm Wave & Inverted Happy Feet) …

A.R.G! Augmented Reality And Gait: Analyzing The Influence Of Cues On Gait Patterns In Augmented Reality, Gwendolyn R. Retzinger, Borna Golbarg, Rabbani R. Nzeza, Wendy T. Pham, Milad Mehrjou, Summer M. Diaz, Jacob W. Hinkel-Lipsker

International Journal of Exercise Science: Conference Proceedings

Use of Augmented Reality (AR) technology for rehabilitation has drastically increased in recent years. While theoretically AR can be used to cue gait adaptations such as changes to step length and cadence through visual and auditory cues, it is still unknown how people respond to the technology. PURPOSE: To assess the feasibility of external visual and auditory cues delivered through AR on spatiotemporal gait outcomes in a healthy, young population. METHODS: 20 healthy participants between age 18 and 35 were screened and recruited to perform randomized gait trials consisting of four different cueing conditions. The participants wore a Magic Leap …

Individuals Following Anterior Cruciate Ligament Reconstruction Respond Differently To Limb Loading Instruction: A Clustering Analysis, Willa Ma, Susan Sigward

International Journal of Exercise Science: Conference Proceedings

Individuals following anterior cruciate ligament reconstruction (ACLr) demonstrate altered loading strategies such as shifting mechanical demand away from the surgical knee. Previous work found that individuals can restore limb loading symmetry with instruction to equalize weight distribution between limbs during a squat task. However, when looking at individual responses to these instructions, it appear that not all individual responded similarly. PURPOSE: To use k-means clustering to describe the variation in response to instruction to equalize weight between limbs in individuals 3-4 months post-ACLr. METHODS: We performed a secondary analysis of a dataset including two groups: individuals 110.4 days …

Impact Of Latin Ballroom Dancing On Gait Biomechanics, Grace Hanks, Tyler Standifird

International Journal of Exercise Science: Conference Proceedings

Purpose: Past research has focused on biomechanical changes, kinematic differences, and injury rates among dancers compared to healthy non-dancers. This research has shown that there are differences biomechanically between dancers and healthy non-dancers which indicates that various forms of dance training has both potential short- and long-term effects on an individual (Yihong et al, 2018, Prochazkova et al, 2014, Tepla et al, 2014, Turner et al 2018). The purpose of this study is to analyze the effect of Latin ballroom dance training on gait. Methods: 24 participants, (12 Latin dancers, 12 recreationally active non-dancers; 12 males,12 females) between the …

Unilateral Load Carriage In Golf Increases Frontal Plane Moment Demand At The Knee, Guanrong Cai, Jordan Cannon, Yunsheng Zou, George Salem

International Journal of Exercise Science: Conference Proceedings

Golf equipment transportation (GET) is a regular task in the sport of golf, a popular activity with more than 66 million participants globally. Unilateral GET is commonly practiced by junior and collegiate golfers, and professional caddies, who incur large walking distances daily, especially during competition. Therefore, the influence of GET on knee mechanics during gait has important implications for performance and injury risks. Furthermore, frontal-plane lower extremity (LE) demands including knee abductor moment during activities may alter knee mechanics and contribute to pain and progression of osteoarthritis (OA). Purpose: To compare the frontal-plane knee moments of two different GET methods …

The Effects Of A 6-Week Intrinsic Foot Morphology, Kinematics, And Kinetics In Individuals With Pes Planus, Rebecca Marszalek, Janet E. Simon, Robert Wayner

Journal of Sports Medicine and Allied Health Sciences: Official Journal of the Ohio Athletic Trainers Association

CONTEXT
The intrinsic foot muscles are vital in supporting the medial longitudinal arch of the foot. Individuals with pes planus have poor foot morphology, strength, and biomechanics, warranting an intervention.

MAIN OUTCOME MEASURES
At pre-intervention, foot posture and arch height were assessed via the Foot Posture Index-6 and the Navicular Drop test, respectively. Cross-sectional area of the abductor hallucis was assessed using ultrasound as an indirect measure of strength. Biomechanical measures, including peak rearfoot eversion, peak tibial internal rotation, peak rearfoot eversion moment, and center of pressure excursion, were collected using 3D-motion capture and an instrumented treadmill. At post-intervention, these …

Effects Of Semi-Custom And Off-The-Shelf Orthoses On Achilles Tendon And Patellofemoral Kinetics In Female Runners, Jonathan Sinclair, Jim D. Richards, Hannah Shore

Baltic Journal of Health and Physical Activity

Background: The aim of the current investigation was to examine the effects of semi-custom and off-the-shelf orthotics on the loads experienced by the patellofemoral joint and the Achilles tendon in female runners. Material and Methods: Twelve female recreational runners ran at 4.0 m.s‑1 whilst wearing no orthotics, semi-custom orthotics and off-the-shelf orthotics. Kinetics and kinematics of running were obtained via a force platform and a motion capture system. Differences between orthotic conditions were contrasted using one-way repeated measures ANOVA. Results: The results showed that both patellofemoral contact force and pressure were significantly lower in the no-orthotic (force = 3.21 B.W …

The Effect Of Front And Back Squat Techniques On Peak Loads Experienced By The Achilles Tendon, Jonathan Sinclair, Chris Edmundson, Stephen Atkins, Paul John Taylor, Hayley Vincent

Baltic Journal of Health and Physical Activity

Background: A primary technique in the discipline of strength and conditioning the squat has two principal ‘back and front’ variants. Despite the physiological and strength benefits of the squat, the propensity for musculoskeletal injury is high. The current investigation examined the influence of the front and back squat variations on the load experienced by the Achilles tendon. Material/Methods: Achilles tendon loads were obtained from eighteen experienced male participants as they completed both back and front squats. Differences between squat conditions were examined using Bonferroni adjusted (p = 0.0125) paired t-tests. Results: The results showed that the peak Achilles tendon load …

Side To Side Differences In Patellar Tendon Kinetics Of The Support Limb During Maximal Instep Soccer Kicking, Jonathan Kenneth Sonclair, Hannah Shore, Stephen Atkins, Sarah Jane Hobbs

Baltic Journal of Health and Physical Activity

Background: Kicking actions have been implicated in the aetiology of soccer injuries, and the unilateral nature of kicking may influence this. The aim of the current investigation was to determine whether soccer players exhibit bilateral differences in support limb patellar tendon loads. Material/Methods: Fifteen male soccer players were examined whilst kicking a stationary soccer ball with both their dominant and non-dominant feet. Patellar tendon kinetics were obtained from each limb and then contrasted using paired samples t-tests. Results: Significant increases in patellar tendon kinetics were found when using the non-dominant limb.Conclusions: The findings from the current investigation have clinical significance …

Evaluation Of The Repeatability Of A Sports Technique Using Selected Kinematics Quantities Based On The Example Of Backhand Spring, Jaroslaw Omorczyk, Leszek Nosiadek, Ewa Puszczalowska-Lizis, Tadeusz Ambrozy, Dawid Mucha, Przemyslaw Bujas, Dariusz Mucha

Baltic Journal of Health and Physical Activity

Background: The aim of the study was to determine the changes that occur during a back handspring performed by artistic gymnastics competitors on the basis of selected biomechanical quantities. Material/Methods: The case study included five masterclass artistic gymnastics competitors. The activities were recorded at the frequency of 120 [Hz]. Using the SkillSpector computer software, selected biomechanical variables of the back handspring technique were analyzed. The coefficient of variation was used to evaluate the variability of movement, which, in turn, was used to describe the repeatability of the back handspring technique. Results: Kinematic analysis of the back handspring carried out with …

Kinematic Analysis Of The Block Startand 20-Metre Acceleration Phase In Two Highly-Trained Sprinters: A Case Report, Michal Janowski, Jacek Zielinski, Michal Wlodarczyk, Krzysztof Kusy

Baltic Journal of Health and Physical Activity

Background: The main purpose was to evaluate individual kinematic characteristics in highly trained sprinters during the „set” position, block clearance and a 20-m acceleration phase, as well as to determine differences and/or technique similarities. Material/Methods: The measurements were carried out on two sprinters, members of the Polish national team. A wireless portable MyoMotion system (Noraxon Inc., USA) was applied. Angular changes and accelerations of all limbs, trunk and head were measured. Results: Increased motion asymmetry between sides brought about stride fluctuation and worsened sprint performance. This effect occurred when the sum of the discrepancies for hip, knee and ankle joints …

The Relationship Between Vertical Jump Performance During Different Training Periods And Results Of 200m-Sprint, Pawel Siembida, Magdalena Zawadka, Piotr Gawda

Baltic Journal of Health and Physical Activity

Background: The purpose of the current study was to investigate: (1) differences between three types of countermovement jumps (CMJ), (2) development of lower-body strength during training periods, and (3) relationship between 200m personal best results and jumping ability in sprinters. Material and methods: A total of 14 male sprinters from local university academic sport club participated in the study. Athletes performed three variants of CMJ: with arm swing (AS), without AS, and from a maximal squat position. We took measures two times: during the active rest period and the final phase of the preparatory period. For measurements the Optojump photoelectric …

Angular Momentum In Skilled Kicking Pullover Performed By Elementary School Children, Yutaka Shimizu, Saburo Nishimura, Shoichi Matsushita

Topics in Exercise Science and Kinesiology

Topics in Exercise Science and Kinesiology Volume 3: Issue 1, Article 2, 2022. This study aimed to clarify the differences in body positions and the role of the swing leg, support leg, and head-arm-trunk segment in generating and maintaining angular momentum of the whole body about a horizontal bar as well as how to improve the skill level of successful kicking pullover attempts. Two-dimensional kinematic parameters of successful kicking pullover attempts and body composition indices of 26 fifth-grade elementary school children were collected. Their techniques were classified into excellent and good groups based on the subjective evaluation of three evaluators. …