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2023

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Effect Of Genetic Diversity On Cortical Bone Phenotype And Response To Mechanical Loading, Nicole Migotsky Jul 2023

Effect Of Genetic Diversity On Cortical Bone Phenotype And Response To Mechanical Loading, Nicole Migotsky

McKelvey School of Engineering Graduate Student Theses & Dissertations

There is a complex interplay between genetics and bone tissue, for both bone morphology and the ability to remodel. Understanding the genetic basis of bone traits in the adult skeleton facilitates the discovery of novel genes or pathways as therapeutic targets for low bone mass. To this end, a genetically diverse mouse population has been created by The Jackson Laboratory using eight Inbred Founder strains. These eight inbred strains were cross-bred for multiple generations to produce the Diversity Outbred (DO) mice, a population with random assortments of genes more closely modeling the human population. Using all eight Inbred Founder strains …

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Hypomyelination Caused By A Novel Homozygous Pathogenic Variant In Folr1: Complete Clinical And Radiological Recovery With Oral Folinic Acid Therapy And Review Of The Literature., Ana Potic, Stefanie Perrier, Tijana Radovic, Svetlana Gavrilovic, Jelena Ostojic, Luan T. Tran, Isabelle Thiffault, Tomi Pastinen, Raphael Schiffmann, Geneviève Bernard Jul 2023

Hypomyelination Caused By A Novel Homozygous Pathogenic Variant In Folr1: Complete Clinical And Radiological Recovery With Oral Folinic Acid Therapy And Review Of The Literature., Ana Potic, Stefanie Perrier, Tijana Radovic, Svetlana Gavrilovic, Jelena Ostojic, Luan T. Tran, Isabelle Thiffault, Tomi Pastinen, Raphael Schiffmann, Geneviève Bernard

Manuscripts, Articles, Book Chapters and Other Papers

BACKGROUND: Neurodegeneration due to cerebral folate transport deficiency is a rare autosomal recessive disorder caused by biallelic pathogenic variants in FOLR1. Onset typically occurs in late infancy and is characterized by psychomotor regression, epilepsy, and a hypomyelinating leukodystrophy on magnetic resonance imaging. If left untreated, progressive neurodegeneration occurs. However, early treatment with folinic acid has been shown to stabilize or reverse neurological features. Approximately thirty patients have been described worldwide. Here, we report the first two cases with genetically proven cerebral folate transport deficiency from South-Eastern Europe, describe the effect of oral folinic acid therapy on clinical and neuroradiological features …

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Role Of Biotechnology In Creating Sustainable Agriculture, Saurav Das, Manjit Kumar Ray, Dinesh Panday, Piyush Kumar Mishra Jul 2023

Role Of Biotechnology In Creating Sustainable Agriculture, Saurav Das, Manjit Kumar Ray, Dinesh Panday, Piyush Kumar Mishra

Department of Agronomy and Horticulture: Faculty Publications

This narrative review paper discusses the role of biotechnology in the development of sustainable agriculture. The paper begins by defning sustanability and highlights the importance of biotechnology in establishing sustainable agriculture. Sustainable agriculture is an approach that prioritizes meeting current food and fiber production needs while conserving and enhancing natural resources for future generations. To achieve agricultural sustainability, it is necessary to strike a balance between economic viability, environmental stewardship, and social responsibility. This can be difficult, especially in the face of biotic and abiotic stresses such as pests, diseases, climate change, soil degradation, and water depletion. The prevalence of …

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Ticks And Tick-Borne Diseases Of Utah, Kate V. Richardson, Ryan Davis, Ricardo Ramirez Jul 2023

Ticks And Tick-Borne Diseases Of Utah, Kate V. Richardson, Ryan Davis, Ricardo Ramirez

All Current Publications

This fact sheet describes ticks and tick-borne diseases in Utah. It includes a description of ticks, their life cycle, habitat, feeding, and reproduction. The fact sheet also provides information about tick bites and safety, common tick-transmitted diseases in Utah, and the status of Lyme disease in Utah.

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Complying With New And Existing Biometric Data Privacy Laws, Ariel Latzer Jul 2023

Complying With New And Existing Biometric Data Privacy Laws, Ariel Latzer

The Journal of Business, Entrepreneurship & the Law

After providing an overview of the history behind biometric information, this article will discuss the Illinois Biometric Privacy Act (BIPA)—which laid the foundation for biometric privacy regulations in the United States—and then discuss the California Consumer Privacy Act (CCPA) and its amendments in the California Privacy Rights Act (CPRA). It will also briefly touch on biometric information regulations in other states and then delve into how some notable companies are currently using individuals’ biometric information to give readers a general idea of what is happening to their personal information and highlight areas businesses should take note of in order to …

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Choreography And Copyright: Why The Law Must Twist And Turn To Serve The Dancing Industry, Gabrielle Mix Jul 2023

Choreography And Copyright: Why The Law Must Twist And Turn To Serve The Dancing Industry, Gabrielle Mix

The Journal of Business, Entrepreneurship & the Law

With so many hurdles to jump over for choreographers to earn simple rights, it is time to re-evaluate the process of copyright protection for dance. In part A, this comment will discuss the history of copyright law and choreography. Part B will analyze the requirements copyright has placed on choreography and the struggles courts face in applying them. Part C will discuss the spread of online choreography and the difficulties these choreographers face regarding copyright protection. Part D will discuss additional reasons why choreographers are not seeking copyright protection. Part E will discuss the barriers choreographers face in proving infringement, …

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Mississippi Libraries 83(1) Spring 2020 (Full Issue) Jul 2023

Mississippi Libraries 83(1) Spring 2020 (Full Issue)

Mississippi Libraries

Complete issue of Mississippi Libraries Volume 83 Number 1 Spring 2020

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Mississippi Libraries 85(4) Winter 2022 (Full Issue) Jul 2023

Mississippi Libraries 85(4) Winter 2022 (Full Issue)

Mississippi Libraries

Complete issue of Mississippi Libraries Volume 85 Number 4 Winter 2022

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Mathematical Identities And Tracking: An Exploration Of Efficacy In Children And Women, Emma Hagan Jul 2023

Mathematical Identities And Tracking: An Exploration Of Efficacy In Children And Women, Emma Hagan

Education | Master's Theses

This study seeks to understand the impact of elementary school mathematical identities and mathematics tracking on the identities of women and girls. “Tracking” is an institutionalized education method developed in the 1960s and 1970s in which schools sort their students into smaller class-sized groups based on their observed achievement (Domina et al., 2016). Too often, when students test onto the lower track, they are confronted with a sense of futility and a lack of self-efficacy (Domina, Hanselman, Hwang & McEachin, 2016; Houtte & Stevens, 2015). Further, in STEM disciplines, students who identify as female report lower self-efficacy rates than those …

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Mississippi Libraries 85(4) Winter 2022 (Full Issue) Jul 2023

Mississippi Libraries 85(4) Winter 2022 (Full Issue)

Mississippi Libraries

Complete issue of Mississippi Libraries Volume 85 Number 4 Winter 2022

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Predicting Active Foot Contact In The Acceleration Phase Of Athletic Sprinting Through Accelerometer Measurements, Marvin Zedler, Veit Schopper, Wolfgang Potthast, Jan-Peter Goldmann Jul 2023

Predicting Active Foot Contact In The Acceleration Phase Of Athletic Sprinting Through Accelerometer Measurements, Marvin Zedler, Veit Schopper, Wolfgang Potthast, Jan-Peter Goldmann

ISBS Proceedings Archive

Active foot contact (absence of a braking impulse) during the acceleration phase of athletic sprinting is associated with the motion of the foot before touchdown (TD). Since the identification of braking impulses through force plate measurements is cost-expensive, the aim of this study was to develop a machine learning algorithm to predict active foot contact occurrences based on ankle-mounted accelerometer measurements. Ten recreationally active athletes (three females, seven males) performed 30 sprint-block-starts each, which were used as input to the machine learning model. Model performance was assessed by the AUC for both validation (AUC = 0.96) and testing (AUC = …

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The Influence Of Mood During Treadmill Running On Biomechanical Asymmetry Of The Lower-Limb, Cheryl A. Williams Miss, Timothy Exell Dr, Miznah Al-Abbadey Dr Jul 2023

The Influence Of Mood During Treadmill Running On Biomechanical Asymmetry Of The Lower-Limb, Cheryl A. Williams Miss, Timothy Exell Dr, Miznah Al-Abbadey Dr

ISBS Proceedings Archive

This study aimed to investigate if mood effects lower-limb biomechanical asymmetry during running. Twenty runners (13M, 7F; age 22-58 years), performed four 3-minute runs at their 5km pace (3.3 ± 0.3 m/s), preceded by a mood questionnaire. Baseline data were captured, followed by randomised mood conditions: anger, happiness, and sadness; elicited with film clips and music. Symmetry angles used for analysis. In the sadness condition, compared with baseline, biomechanical asymmetry significantly increased (p < .05) by 3.7% at ground contact for hip abduction, and at toe-off for knee abduction by 0.6% and internal rotation by 1.1%. Toe-off plantarflexion asymmetry decreased by 2.2% with anger, compared to baseline. Happiness did not appear to affect asymmetry. Results suggest sadness may increase asymmetry and associated overuse injury risk, and anger may facilitate symmetry.

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Skilled Riders Manage Horse Gait Complexity Through A Gait Transition Whilst Also Maintaining Stable Horse-Rider Coordination Variability, Celeste A. Wilkins, Franky Mulloy Jul 2023

Skilled Riders Manage Horse Gait Complexity Through A Gait Transition Whilst Also Maintaining Stable Horse-Rider Coordination Variability, Celeste A. Wilkins, Franky Mulloy

ISBS Proceedings Archive

Equestrian riders aim to cue smooth transitions between horse gaits. This study aimed to investigate whether competitive horse rider (n=10) decrease horse gait regularity and increase horse-rider coordination variability in the region of a gait transition (n=6; both walk-trot, and trot-canter) relative to baseline walk, trot and canter. Resultant accelerations from IMUs affixed to the horse’s girth and rider’s pelvis were calculated. Horse gait regularity was quantified as multiscale sample entropy (MSSE) of the pelvis. Horse-rider coordination variability (Coordvar) was quantified as the standard deviation of the horse-rider continuous relative phase. Pre-transition MSSE did not increase; post-transition MSSE …

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Validation Of An Inertial Measurement Unit Based Estimation Of Trunk Motion In Sit-Skiing: A Pilot Study, Anna C. Severin, Gertjan Ettema, Jan Kocbach, Jørgen Danielsen Jul 2023

Validation Of An Inertial Measurement Unit Based Estimation Of Trunk Motion In Sit-Skiing: A Pilot Study, Anna C. Severin, Gertjan Ettema, Jan Kocbach, Jørgen Danielsen

ISBS Proceedings Archive

Sagittal plane trunk movement is important for producing propulsive force when sit-skiing. We aimed to validate the use of inertial measurement units for measuring sagittal plane trunk movements during sit-skiing in the field. Able-bodied participants (n=4) performed 30 seconds of sit-skiing in a kneeling position on a treadmill while one AdMos IMU sensor (on the upper back) and 4 reflective markers on the trunk recorded kinematics. A secondary validation was performed with 4 sensors and markers attached to a rigid body, which was rotated to mimic the trunk during sit-skiing. For the rigid body, the root mean square error was

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Can Short Bouts Of Technique Training Improve Sprint Technique And Performance In Youth Soccer Players?, Saint Andrews Sackey, Archit Navandar, Sami Kuitunen Jul 2023

Can Short Bouts Of Technique Training Improve Sprint Technique And Performance In Youth Soccer Players?, Saint Andrews Sackey, Archit Navandar, Sami Kuitunen

ISBS Proceedings Archive

This study aimed to investigate whether a technique-oriented intervention would result in improvements in sprint running technique and sprint performance in youth soccer players. Fourteen youth soccer players with pelvis and trunk control issues were divided into intervention and control groups. The intervention group did three weekly 15 minute running technique-oriented training sessions over seven weeks while their counterparts continued with their usual training programme. Sprint performance and technique were assessed before and after the intervention with a Laveg device and two video cameras, respectively, during a 40-m maximal sprint test. The players of the intervention group showed improved control …

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Estimating Lower Limb Joint Moments In Gait Using Common Machine Learning Approaches, Alex Ong Dr, Joseph Hamill Jul 2023

Estimating Lower Limb Joint Moments In Gait Using Common Machine Learning Approaches, Alex Ong Dr, Joseph Hamill

ISBS Proceedings Archive

The aim of this study was to investigate the efficacy of common machine learning algorithmic approaches to estimate lower limb joint moments during fast walking gait. Kinematic and ground reaction force data on 19 participants were captured with a force-plate and motion caption capture system. Inverse dynamics was used to calculate the right lower limb joint moments and common machine learning algorithmic approaches, such as Random Forest (RF), Linear Regression (LR), Neural Network (NN), AdaBoost (AB) and Gradient Boosting, were used to predict the corresponding joint moments using only the kinematic data. High coefficient of determination values (R2>0.9) …

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Accuracy Of The Motusbaseballtm Wearable Sensor, Kane Middleton, Molly Connolly, Nicholas Busuttil, Michael Cianciosi Jul 2023

Accuracy Of The Motusbaseballtm Wearable Sensor, Kane Middleton, Molly Connolly, Nicholas Busuttil, Michael Cianciosi

ISBS Proceedings Archive

The purpose of this study was to assess the accuracy of the motusBASEBALLTM sensor. Trained/developmental male adult baseball pitchers (n = 10) threw ten pitches each from a regulation mound while kinematic and kinetic data were captured using an optical motion capture system and a motusBASEBALLTM sensor. Absolute and relative agreement were assessed. Outputs from the motusBASEBALLTM sensor were significantly different to the motion capture outputs for elbow varus torque, shoulder rotation, and arm speed (p < .05). Data were similar for arm slot (p = .847). Correlations (r) between system outputs were not significant (p > .05) and ranged from …

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Impulse Generation And Initial Velocity Differences In Two-Foot Running Jumps With And Without A Basketball, Jun M. Liu, Antonia Zaferiou Jul 2023

Impulse Generation And Initial Velocity Differences In Two-Foot Running Jumps With And Without A Basketball, Jun M. Liu, Antonia Zaferiou

ISBS Proceedings Archive

This study aimed to (1) identify the roles of each leg in impulse generation and (2) determine differences in impulse generation and initial centre of mass velocities in two-foot running jumps with and without a ball. Eight recreational to collegiate basketball players performed three to ten repetitions of two-foot running jumps with and without a ball. We found that the first leg generated more backward and vertical impulse than the second leg in both two-foot running jumps with and without a basketball. Two-foot running jumps with a ball resulted in lower jump height and less vertical impulse generated by the …

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Movement Variability In Elbow And Wrist Kinematics Of New Ball Outswing Bowling In Cricket Fast Bowlers, Cody Lindsay, Rian Crowther, Kane Middleton Dr, Brad Clark, John Warmenhoven, Wayne Spratford Jul 2023

Movement Variability In Elbow And Wrist Kinematics Of New Ball Outswing Bowling In Cricket Fast Bowlers, Cody Lindsay, Rian Crowther, Kane Middleton Dr, Brad Clark, John Warmenhoven, Wayne Spratford

ISBS Proceedings Archive

This study investigated between-bowler movement variability of wrist and elbow kinematics during new ball swing bowling. A 3D motion analysis system captured the bowling action and ball trajectory of 11 pre-elite and elite fast bowlers delivering outswing. Kinematics were normalised to 100% of the delivery stride between back foot contact and ball release. A statistical parametric mapping approach using one-way ANOVAs investigated inter-individual movement variability. Significant differences were found in all kinematic parameters except for wrist radial/ulnar deviation angular velocity with bowlers using small amounts in either direction at the beginning of the phase. This study highlights that high-level athletic …

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Effects Of Movement Sonification Auditory Feedback On Repetitions And Brain Activity During The Bench Press, Sangwoo Lee, Brandon Schoenwether, Collin Garner, Aubrey Nachtegall, Daekyoo Kim, Edward Roth Jul 2023

Effects Of Movement Sonification Auditory Feedback On Repetitions And Brain Activity During The Bench Press, Sangwoo Lee, Brandon Schoenwether, Collin Garner, Aubrey Nachtegall, Daekyoo Kim, Edward Roth

ISBS Proceedings Archive

The purpose of this study was to investigate the effects of movement sonification auditory feedback on repetitions and brain activity during bench press. Twenty participants performed bench press until failure in three different sound conditions: no-sound, self-selected music, and movement sonification. Repetition maximum was measured to assess bench press performance. Beta wave representing arousal level and frontal alpha asymmetry indicating motivation level and type were also measured. Results showed that frontal alpha asymmetry in movement sonification was significantly higher than that in music and no-sound, but no statistically significant differences were observed in repetition maximum and beta wave among the …

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Real-Time Backward Slip Detection Using A Slip-Inducing System And Machine Learning Methods, Chihyeong Lee, Jooeun Ahn Jul 2023

Real-Time Backward Slip Detection Using A Slip-Inducing System And Machine Learning Methods, Chihyeong Lee, Jooeun Ahn

ISBS Proceedings Archive

Wearable devices have been developed to assist walking based on the wearer’s intention. However, it would be dangerous if a device misidentifies falling as intentional motion; it is necessary to detect falls in real time. In particular, backward slip is the most common and dangerous type of falls. Fifteen participants walked on a split-belt instrumented treadmill while random backward slip perturbation of belt speed acceleration was provided to the foot. We aimed to identify slip within 0.35s after the onset of the perturbation, the typical window of slip, using lower limb kinematic data obtained within 0.3s; only 0.05s was allowed …

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Variation In Recent Citation Metrics For Biomechanics Journals, Duane Knudson, Scott Quimby Jul 2023

Variation In Recent Citation Metrics For Biomechanics Journals, Duane Knudson, Scott Quimby

ISBS Proceedings Archive

This study documented recent citation metrics in 14 biomechanics journals from 2017 until 2021. Five recent metrics were extracted to report 2021 values, absolute and relative variability and slope over the five years. Mean usage were typical based on normalized metrics (0.6 to 1.1 for SJR3 & SNIP3) and IF5 and CS4 (2.7 & 3.5). Year-to-year absolute and relative variability were 0.11 - 0.48 and 12% - 21%, respectively. There was considerable variation of journal metrics in biomechanics journals supporting previous research journal metrics should not be reported to greater than one decimal place precision and meaningful differences across time …

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Effects Of Vibration Combined With Unstable Surface Training On Somersault Athletic Performance Of Artistic Gymnasts, Yu-Hsuan Kao Jul 2023

Effects Of Vibration Combined With Unstable Surface Training On Somersault Athletic Performance Of Artistic Gymnasts, Yu-Hsuan Kao

ISBS Proceedings Archive

Purpose: The effect of 4 and 8 weeks of combined training on the somersault performance of artistic gymnasts. Methods: 16 male college gymnasts were randomly paired and divided into combined (CT) and vibration (VT) groups for eight weeks of training. One force plate was used to collect the front and back somersault data before, after four, and eight weeks of training. The significance level was set at α = .05. Results: Back somersault, the take-off force and somersault height of CT were better than pre-test, and the somersault height was better than VT. Front somersault, the take-off force, impulse, and …

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Blood Flow Restriction Does Not Affect Acute Measures Of Power And Fatigue During Maximal Cycling Among Women, Steffen Hoover, Denzel D. Henderson, Jeremy E. Cross, Olivia J. Giammalva, Jessica Whicker, T Scott Lyons, Andrew Zolp, Zeljka Vidic, Donald L. Hoover Jul 2023

Blood Flow Restriction Does Not Affect Acute Measures Of Power And Fatigue During Maximal Cycling Among Women, Steffen Hoover, Denzel D. Henderson, Jeremy E. Cross, Olivia J. Giammalva, Jessica Whicker, T Scott Lyons, Andrew Zolp, Zeljka Vidic, Donald L. Hoover

ISBS Proceedings Archive

While it is known that blood flow restriction (BFR) can positively affect training and rehabilitation progression timelines, the physiological basis of this intervention is not fully understood. The purpose of this study was to determine the short-term impact of BFR upon power and fatigue performance measures during maximal cycling. In this study, maximal cycling was assessed using the Wingate Anaerobic Test (WAnT). Using a counterbalanced design, fourteen female participants completed standardized BFR and non-BFR protocols while completing the WAnT. No statistically-significant differences (p ≤ 0.05) were found between conditions for measures of peak power (PP), low power (LP) or fatigue …

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The Effects Of Blood Flow Restriction On Measures Of Gross Motor Coordination During The Wingate Anaerobic Test, Donald L. Hoover, Jessica Whicker, Jeremy E. Cross, Olivia J. Giammalva, Denzel D. Henderson, Steffen J. Hoover, T Scott Lyons, Andrew Zolp, Zeljka Vidic Jul 2023

The Effects Of Blood Flow Restriction On Measures Of Gross Motor Coordination During The Wingate Anaerobic Test, Donald L. Hoover, Jessica Whicker, Jeremy E. Cross, Olivia J. Giammalva, Denzel D. Henderson, Steffen J. Hoover, T Scott Lyons, Andrew Zolp, Zeljka Vidic

ISBS Proceedings Archive

To date little research has addressed the impact of blood flow restriction (BFR) training upon gross motor coordination measures (GMCM) during a wide variety of maximal activities. The purpose of this study was to assess the effects of BFR on GMCM exhibited during maximal cycling. The performance of 14 females between the ages of eighteen and thirty-five were analyzed during the Wingate Anaerobic Test (WAnT). The participants completed the test under two conditions, using BFR and without. Results showed statistically significant differences (p ≤ 0.05) between conditions for dependent variables assessed throughout this common 30 second test of maximal cycling. …

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Ankle And Knee Joint Functional Indices During A Drop Jump: Exploring Performance Relationships, Michael H. Haischer, Nayun Ahn, Nora Mckeough, William R. Adler, Kristof Kipp Jul 2023

Ankle And Knee Joint Functional Indices During A Drop Jump: Exploring Performance Relationships, Michael H. Haischer, Nayun Ahn, Nora Mckeough, William R. Adler, Kristof Kipp

ISBS Proceedings Archive

The purpose of this study was to describe ankle and knee joint functional indices during a drop jump task and characterize the associations to performance outcomes (jump height, ground contact time, and reactive strength index). Forty-five collegiate or club level athletes performed five drop jumps off a 12-inch box while motion capture and ground reaction force data were recorded. Time-series joint kinematics and kinetics were used to calculate joint functional indices, reported as relative percentages of strut-, spring-, damper-, and motor-like mechanical behavior. Correlation and regression analyses uncovered several significant associations between joint functional indices and performance outcomes. Greater motor-like …

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Effect Of Head Position On Centre Of Mass Variability During Handstand: Preliminary Results, Roman Farana, Pavel Brtva, Gareth Irwin Jul 2023

Effect Of Head Position On Centre Of Mass Variability During Handstand: Preliminary Results, Roman Farana, Pavel Brtva, Gareth Irwin

ISBS Proceedings Archive

The aims of this study were: a) to determine to determine the change in joint angle kinematic variability during the handstand with different head positions, and b) to determine the contributions made by wrist, shoulder, and hip joint angles variability on CoM variability in handstand. Four young active female gymnasts performed 3 trials of handstands with three head positions (normal, straight, and flexed). 3D kinematics were collected for each trial. Statistical differences were analysed using One-way ANOVA and effect sizes (ES) reported. Forward stepwise regression was carried out between CoM variability and joint angle variability. The prevalent control strategies were …

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Mapping Out The Response Sequence Of The Sprint Start, Evan D. Crotty Dr, Laura-Anne M. Furlong Dr, Andrew J. Harrison, Matthieu Milloz Jul 2023

Mapping Out The Response Sequence Of The Sprint Start, Evan D. Crotty Dr, Laura-Anne M. Furlong Dr, Andrew J. Harrison, Matthieu Milloz

ISBS Proceedings Archive

Establishing the limits of sprint start response time (SSRT) requires the mapping of the muscular sequence of activation and mechanical response delays and was the aim of the current study. Sprint start performance of 15 sprinters was examined with kinematic, EMG, and block force data collected. A general muscle activation sequence was identified, with both deltoid muscles, the rear leg rectus femoris, and the rear leg tibialis anterior the first muscles to increase activation from the set position. With ankle dorsiflexion the initial motion during the block push, examining the period between tibialis anterior muscle onset and block force onset …

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Reliability Of Low-Cost Portable Force Platforms For Measuring Vertical Stiffness During Running, Bryan R. Cobb, Damaris C. Cifuentes Jul 2023

Reliability Of Low-Cost Portable Force Platforms For Measuring Vertical Stiffness During Running, Bryan R. Cobb, Damaris C. Cifuentes

ISBS Proceedings Archive

Ground reaction force (GRF) can provide useful information such as vertical stiffness (Kvert) to practitioners working with runners and sprinters, but high equipment costs are hindering applied research. Low-cost portable force platforms may be a useful alternative to traditional biomechanical equipment. Moderately trained runners (n = 9) completed overground running trials at various speeds (2.15-5.78 m/s), Kvert was determined, and a linear regression was used to characterize the relationship between Kvert and running speed. The results showed moderate to high correlation (r2 = 0.54 to 0.87). At 3.9 m/s (14 km/h), the widest regression …

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Effects Of Calf Anchoring Compression Levels On Ankle Kinematics, Motor Unit Behavior, Energy Cost, And Discomfort During Walking, Jaewoo Cho, Eunsik Choi, Sangheui Cheon, Seongwon Hwang, Jooeun Ahn Jul 2023

Effects Of Calf Anchoring Compression Levels On Ankle Kinematics, Motor Unit Behavior, Energy Cost, And Discomfort During Walking, Jaewoo Cho, Eunsik Choi, Sangheui Cheon, Seongwon Hwang, Jooeun Ahn

ISBS Proceedings Archive

We propose a method for quantifying the anchoring compression of wearable devices using limb occlusion pressure (LOP). Under 0%, 20%, 40%, and 60% of LOP, five healthy male participants performed an isometric ankle plantarflexion task before and after walking on an inclined treadmill. Significant differences were shown in calf discomfort (p < 0.001), and ankle plantarflexion angle (p = 0.013) during walking. Although no significant difference was found for oxygen consumption and motor unit behavior of the gastrocnemius medialis, the maintenance of ankle plantarflexion angle was related to an increase in peak motor unit action potential amplitude and average firing rate at 60% of LOP. The results suggest that subjective assessment is more sensitive than the physiological indices, and calf anchoring force should not exceed 60% LOP to avoid any possible negative effect on the muscle.

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