Rehabilitation and Therapy Commons^™

Validation Of Scores From A Telephone Administered Multiple Sclerosis Walking Scale-12 In Persons With Multiple Sclerosis, Robert W. Motl, Prudence Plummer, Deborah Backus, Jeffrey R. Hebert, Whitney N. Neal, Alexander V. Ng, John Lowman, Francois Bethoux, Hollie Schmidt, Robert Mcburney, Kevin K. Mccully, Gary R. Cutter

Exercise Science Faculty Research and Publications

Background

The Multiple Sclerosis Walking Scale-12 (MSWS-12) has typically been delivered through paper-and-pencil or computer-based administration.

Purpose

This study examined the validity of inferences from scores derived via a telephone administration of the MSWS-12 applied as part of screening of participants with walking dysfunction into a clinical trial of exercise training in MS.

Method

The MSWS-12 was administered on two occasions separated by approximately 2 weeks through the telephone and then in-person (i.e., computer-based administration). Participants further completed the Patient Determined Disease Steps (PDDS) scale, timed 25-foot walk (T25FW), six-minute walk (6MW), Modified Fatigue Impact Scale (MFIS), and Multiple Sclerosis …

Influence Of Stimulation Frequency On Brain-Derived Neurotrophic Factor And Cathepsin-B Production In Healthy Young Adults, Yuichi Nishikawa, Hiroyuki Sakaguchi, Tatsuya Takada, Noriaki Maeda, Allison S. Hyngstrom

Physical Therapy Faculty Research and Publications

Electrical muscle stimulation (EMS) has been shown to stimulate the production of myokines (i.e., brain-derived neurotrophic factor (BDNF)), but the most effective EMS parameters for myokine production have not been fully elucidated. The purpose of this study was to quantify the optimal EMS frequency for stimulating myokine production. This study included sixteen young adults (male, n = 13, age = 27.3 ± 5.5 years). Participants underwent four EMS interventions (20 min each) with the following conditions: (1) 4 Hz, (2) 20 Hz, (3) 80 Hz, and (4) control (no intervention). Blood samples were obtained before and immediately after EMS. For …

The Validation Of Remote-Synchronous And Remote-Asynchronous Physical Performance-Based Outcome Measurements, Kieran James Mullen

Master's Theses (2009 -)

Performance-based outcome measures are used by clinical and research communities to identify health risks, assess change in physical function over time, and assess the success of treatment. With the onset of COVID-19, remote assessments were sought as alternatives to in-person testing, however there is inadequate literature on the validity of remote performance-based outcome measurement to assess physical function. Current literature is limited to small cohort studies, and none take advantage of novel comparison of agreement methodology. This study assessed the level of agreement between three methods of performance-based outcome data collection: in-person data collection, remote synchronous data collection, and remote …

Sex Differences In Spontaneous Respiratory Recovery In Chronic Hemisection, Taylor C. Holmes, Nicole M. Popp, Carley F. Hintz, Isabell Dobrzycki, Carolyn J. Schmitz, Kaylyn A. Schwichtenberg, Elisa J. Gonzalez-Rothi, Christopher W. Sundberg, Kristi A. Streeter

Physical Therapy Faculty Research and Publications

Respiratory deficits after C2 hemisection (C2Hx) have been well documented through single-sex investigations. Although ovarian sex hormones enable enhanced respiratory recovery observed in females 2 wk post-C2Hx, it remains unknown if sex impacts spontaneous respiratory recovery at chronic time points. We conducted a longitudinal study to provide a comprehensive sex-based characterization of respiratory neuromuscular recovery for 8 wk after C2Hx. We recorded ventilation and chronic diaphragm electromyography (EMG) output in awake, behaving animals, phrenic motor output in anesthetized animals, and performed diaphragm muscle histology in chronically injured male and female rodents. Our results show that females expressed a greater recovery …

Noninvasive Estimation Of Skeletal Muscle Oxygen Consumption Rate And Microvascular Reactivity In Chronic Stroke Survivors Using Near-Infrared Spectroscopy, Allison S. Hyngstrom, Jennifer N. Nguyen, David D. Gutterman, Brian D. Schmit, Emilie A. Klevenow, Matthew J. Durand

Physical Therapy Faculty Research and Publications

Understanding post-stroke changes in skeletal muscle oxidative metabolism and microvascular reactivity could help create therapeutic targets that optimize rehabilitative interventions. Due to disuse atrophy, we hypothesized that basal muscle oxygen consumption rate and microvascular endothelial function would be impaired in the tibialis anterior (TA) muscle of the affected leg of chronic stroke survivors compared with the nonaffected leg and versus matched controls. Fifteen chronic stroke survivors (10 females) and 15 matched controls (9 females) completed this study. A near-infrared spectroscopy oximeter measured tissue oxygen saturation (StO₂) of the TA in both legs of stroke survivors and the dominant …

Reduced Oxygen Desaturation In The Vastus Lateralis Of Chronic Stroke Survivors During Graded Muscle Contractions, Allison S. Hyngstrom, Jennifer N. Nguyen, Spencer A. Murphy, Stephanie C. Raab, Brian D. Schmit, David D. Gutterman, Matthew J. Durand

Physical Therapy Faculty Research and Publications

Background

Few studies have examined changes in skeletal muscle physiology post-stroke. This study examined changes in tissue oxygen saturation (StO₂) of the vastus lateralis (VL) muscle of stroke survivors and age-matched control participants during maximal and submaximal isometric contractions of the knee extensor muscles.

Objectives

We hypothesized that tissue oxygen desaturation (ΔStO₂) during knee extensor muscle contractions would be less in the VL in the paretic vs. the non-paretic and control legs.

Methods

Ten chronic stroke survivors (>6 months post-stroke) with lower extremity muscle weakness and 10 age-matched controls completed this prospective cohort study. Maximum …

Prolonged Quadriceps Latency During Gait Early After Anterior Cruciate Ligament Injury Predicts Radiographic Knee Osteoarthritis 6-Years After Anterior Cruciate Ligament Reconstruction, Naoaki Ito, Jacob J. Capin, Elanna Arhos, Elizabeth Wellsandt, Ryan T. Pohlig, Thomas S. Buchanan, Lynn Snyder-Mackler

Physical Therapy Faculty Research and Publications

The purpose was to explore quadriceps electromechanical function (quadriceps latency) during gait after anterior cruciate ligament injury as a predictor for radiographic knee osteoarthritis 6-years after anterior cruciate ligament reconstruction. Change in latency after preoperative physical therapy was also examined.

Methods

Quadriceps latency (time between peak knee moment and quadriceps electromyography) was calculated before preoperative physical therapy (2.4 [0.5–7.5] months after anterior cruciate ligament injury) and after preoperative physical therapy in 24 athletes. Participants were dichotomized into osteoarthritis (Kellgren and Lawrence grade ≥ 2) and non-osteoarthritis groups at 6-years. Forward selection logistic repression was performed using z-score normalized quadriceps latency …

Effects Of Photobiomodulation Therapy On Muscle Function In Individuals With Multiple Sclerosis, Mitra Rouhani, Miguel Tolentino, Jeri-Anne Lyons, Alexander V. Ng

Exercise Science Faculty Research and Publications

Background

In people with multiple sclerosis (pwMS), muscle fatigue and weakness are common issues that can interfere with daily activities. Photobiomodulation therapy (PBMT), comprising light in a 600–1100 nm bandwidth, is a low-level laser therapy thought to improve muscle performance in non-disease populations, in part, by improving mitochondrial function and thus, might be beneficial in pwMS. Given this potential, we aimed to investigate the effects of PBMT on muscle performance in pwMS, both in the short-term and over an extended period.

Methods

This study consisted of two parts with a randomized double-blind crossover design. In study I, muscle function was …

Mechanisms Of Neuromuscular Fatigability In Individuals With Multiple Sclerosis, Mitra Rouhani

Dissertations (1934 -)

Subjective fatigue and pain are commonly reported in people with MS (pwMS), as is neuromuscular fatigability. The dynamometry protocols used to measure neuromuscular fatigability in pwMS varied substantially in terms of components, leading to inconsistent findings regarding the extent of neuromuscular fatigability and its central and peripheral mechanisms in pwMS compared to non-MS controls. This dissertation aimed to compare neuromuscular fatigability and its underlying mechanisms following a sustained maximal to intermittent submaximal ankle dorsiflexion in pwMS, grouped by disease severity, and non-MS controls. Additionally, we aimed to determine the impact of physical activity, muscle oxidative capacity, and exercise-induced pain on …

People With Degenerative Cervical Myelopathy Have Impaired Reactive Balance During Walking, Timothy F. Boerger, Learon Mcginn, Megan Bellman, Marjorie C. Wang, Brian D. Schmit, Allison S. Hyngstrom

Physical Therapy Faculty Research and Publications

Background

People with degenerative cervical myelopathy are known to have impaired standing balance and walking abilities, but less is known about balance responses during walking.

Research question

The aim of this project was to assess reactive balance impairments during walking in people with degenerative cervical myelopothy (PwDCM). We hypothesized that center of mass motion following perturbations would be larger in PwDCM and gluteus medius electromyographic amplitude responses would be decreased in PwDCM.

Methods

Reactive balance responses were quantified during unanticipated lateral pulls to the waist while treadmill walking. Walking biomechanics data were collected from 10 PwDCM (F=6) and 10 non-myelopathic …

Female Athletes With Better Psychological Readiness Are At Higher Risk For Second Acl Injury After Primary Acl Reconstruction, Ryan Zarzycki, Kathleen Cummer, Elanna Arhos, Matthew Failla, Jacob J. Capin, Angela H. Smith, Lynn Snyder-Mackler

Physical Therapy Faculty Research and Publications

Background: Approximately 1 in 4 athletes returning to sports will sustain a second anterior cruciate ligament (ACL) injury. Psychological factors related to kinesiophobia, confidence, and psychological readiness are associated with second ACL injury; however, the evidence is conflicting.

Hypothesis: Athletes who sustain a second ACL injury (ie, graft rupture or contralateral ACL rupture) within 2 years of ACL reconstruction (ACLR) would have greater kinesiophobia, less confidence, and lower psychological readiness prior to return to sport (RTS) compared with athletes who do not sustain a second ACL injury.

Study Design: Secondary analysis of a prospective randomized trial.

Level …

Age-Related Development Of Bilateral Coordination Of The Upper Limbs In Children And Adolescents, Samuel Nemanich, Sheila M. Schindler-Ivens

Physical Therapy Faculty Research and Publications

Bilateral coordination of the upper limbs (UL) is important for activities of daily living and physical activities. Motor coordination improves from childhood through adolescence. However, age-coordination trajectories for bilateral UL movements are not well-established, and it is unclear if bimanual coordination develops slower than unilateral coordination. In this study we examined age-related changes in UL coordination from childhood to late adolescence. Typically-developing children (N = 29, aged 7–17 years) performed unilateral and bilateral, antiphase cycling tasks with their ULs. Variations in cycling velocity and interlimb phase errors were computed as measures of coordination. Linear regression was used to examine …

The Effects Of Attentional Focus Instructions On Approach Jump Performance, Hanwen Liu, Scott Arnett, Dano Tolusso, Kaylee Woodard

Physical Therapy Faculty Research and Publications

Introduction

Attentional focus has been shown to significantly influence motor learning and performance, with external focus instructions enhancing performance compared to internal focus instructions. Research has also demonstrated that novice performance is improved when instructed to focus on skill execution processes rather than outcomes. However, this effect remains untested in complex jumping skills crucial to numerous sports.

Purpose

This study aimed to investigate the effect of internally and externally directed process and outcome focus instructions on approach jump height and approach speed in novice participants.

Methods

Twelve individuals aged 18 to 22 participated across three sessions: Familiarization, Test Session 1, …

Heart Rate Variability Is Reduced In Covid-19 Survivors And Associated With Physical Activity And Fatigue, Michael H. Haischer, Lauren E. Opielinski, Lindsey M. Mirkes, Toni D. Uhrich, Rachel E. Bollaert, Michael E. Danduran, Marie K. Hoeger Bement, Linda B. Piacentine, Paula E. Papanek, Sandra K. Hunter

Exercise Science Faculty Research and Publications

Reduced heart rate variability (HRV) and fatigue are common after COVID-19 infection and both are potentially influenced by physical activity (PA). We compared resting HRV, PA from accelerometers and questionnaires, and self-reported fatigue in 41 COVID-19 survivors (~8 months postinfection, 38 ± 17 years) with 41 matched controls. Differences in HRV were observed on acceleration capacity (p = 0.041), deceleration capacity (p = 0.032), high-frequency peak frequency (p = 0.019), absolute low-frequency power (p = 0.042), relative very low-frequency power (p = 0.012), SD2 (from Poincare plot; p = 0.047), and DFA2 (slope of long-term …

Middle-Range Scores From The Patient Determined Disease Steps Scale Reflect Varying Levels Of Walking Dysfunction In Multiple Sclerosis, Robert W. Motl, Whitney Neal, Deborah Backus, Jeffrey Hebert, Kevin K. Mccully, Francois Bethoux, Prudence Plummer, Alexander V. Ng, John Lowman, Hollie Schmidt, Robert Mcburney, Gary R. Cutter

Exercise Science Faculty Research and Publications

Background

Multiple sclerosis (MS) is a leading cause of neurological disability among young and middle-aged adults worldwide, and disability is measured using a variety of approaches, including patient reported outcome measures (PROMs) such as the Patient Determined Disease Steps (PDDS) scale. There is limited evidence for the validity of inferences from the middle-range of scores on the PDDS (i.e., 3 “gait disability” – 6 “bilateral support”), but that range of scores seemingly represents moderate disability characterized by varying levels of walking dysfunction.

Purpose

The current study examined whether the middle-range of scores from the PDDS reflect varying levels of walking …

Health Sciences Students’ Career Commitment, Mental Health, And Physical Activity During The Covid-19 Pandemic, David Wrucke, Marie K. Hoeger Bement, April L. Harkins, Sandra K. Hunter, Stacy Stolzman, Astrida S. Kaugars

Physical Therapy Faculty Research and Publications

Objective: To understand the biopsychosocial dimensions of university health sciences students’ experiences during the COVID-19 pandemic.

Participants: Health sciences students (n = 297) from two universities in July and August 2020.

Methods: Participants completed a Web-based survey asking about depression, anxiety, physical activity, coronavirus threat, and career commitment.

Results: Moderate or severe depression and anxiety were reported by 28.6% and 31.3% of respondents, respectively. Depression and anxiety were positively correlated with perceived coronavirus threat and negatively correlated with career commitment and strenuous physical activity. A change in career commitment interests during the COVID-19 pandemic was reported by 11% of …

Activity Levels Across The Intensity Spectrum In Athletes: A Systematic Review Protocol, Jacob J. Capin, Jena Heck Street, Alissa V. Fial, Nicola D. Ridgers, Grant R. Tomkinson

Physical Therapy Faculty Research and Publications

Physical activity (PA) promotes better cardiometabolic health, physical function, brain health and longevity. In contrast, prolonged sedentary behaviour (SB) is a risk factor for many chronic diseases and poor health. Limited research has evaluated or synthesised how competitive sports participation influences PA across the lifespan. Some evidence suggests, ironically, that former competitive athletes may be insufficiently active and current athletes may be highly sedentary away from sport. This study describes the protocol for a systematic review and meta-analysis on activity levels across the intensity spectrum in athletes, addressing the primary research question: is sports participation significantly associated with PA and/or …

Midlife Health Crisis Of Former Competitive Athletes: Dissecting Their Experiences Via Qualitative Study, Jacob J. Capin, Taylor Wolf, Jena Heck Street, Carolyn S. Smith, Shannon L. Lennon, William B. Farquhar, Sandra K. Hunter, Linda B. Piacentine

Physical Therapy Faculty Research and Publications

Sports participation confers many health benefits yet greatly increases injury risk. Long-term health outcomes in former athletes and transition to life after competitive sports are understudied. Ending a sport may pose physical and psychosocial challenges. The purpose was to determine the lived experiences of former competitive athletes and how their sports participation impacted their long-term health and well-being. Former college varsity athletes participated in semistructured interviews focusing on their experiences, including past and current health, the impact of injuries, activity, exercise, diet and transition to life after competitive sport. Thematic analysis was completed using a collaborative, iterative process. Thirty-one (16 …

Sex Differences In Fatigability And Recovery Following A 5 Km Running Time Trial In Recreationally Active Adults, Maria Solleiro Pons, Sandra K. Hunter, Paul Ansdell

Exercise Science Faculty Research and Publications

Females demonstrate greater fatigue resistance compared to males in tasks ranging from single-limb contractions to whole-body exercise, including running. Many of the studies investigating sex differences in fatigability following running, however, occur after long duration, low-intensity tasks and it is unknown whether there is a sex difference in fatigability following high-intensity running. This study compared fatigability and recovery following a 5 km running time trial in young males and females. Sixteen recreationally active participants (8 males, 8 females, age: 23 ± 4 years) completed a familiarisation and experimental trial. Knee-extensor maximal voluntary contractions (MVCs) were performed before and up to …

Underrepresentation Of Women In Exercise Science And Physiology Research Is Associated With Authorship Gender, Jessica J. James, Emilie A. Klevenow, Mira A. Atkinson, Emma E. Vosters, Elizabeth P. Bueckers, Meagan E. Quinn, Samantha L. Kindy, Azara P. Mason, Sophia K. Nelson, Kennedy A. H. Rainwater, Petra V. Taylor, Elena P. Zippel, Sandra K. Hunter

Exercise Science Faculty Research and Publications

Historically, low representation of women participants in exercise science and physiology studies has led to a lack of understanding in the response of women to exercise and therapeutic interventions. We hypothesized that 1) the number of women authors, participants, and editorial board members increased over 30 years (1991–2021) and 2) larger representation of women as editors and authors is associated with more women participants. Gender (man/woman) of editorial board members (n = 394), authors (n = 5,735), and participants (n = 2,984,883) of 972 original research articles with human participants published in 1991 and 2021 …

The Biological Basis Of Sex Differences In Athletic Performance: Consensus Statement For The American College Of Sports Medicine, Sandra K. Hunter, Siddhartha S. Angadi, Aditi Bhargava, Joanna Harper, Angelica Lindén Hirschberg, Benjamin D. Levine, Kerrie L. Moreau, Natalie J. Nokoff, Nina S. Stachenfeld, Stéphane Bermon

Exercise Science Faculty Research and Publications

Biological sex is a primary determinant of athletic performance because of fundamental sex differences in anatomy and physiology dictated by sex chromosomes and sex hormones. Adult men are typically stronger, more powerful, and faster than women of similar age and training status. Thus, for athletic events and sports relying on endurance, muscle strength, speed, and power, males typically outperform females by 10%–30% depending on the requirements of the event. These sex differences in performance emerge with the onset of puberty and coincide with the increase in endogenous sex steroid hormones, in particular testosterone in males, which increases 30-fold by adulthood, …

Myofascial Stiffness Of Plantar Fascia And Achilles Tendon In Individuals With Plantar Fasciopathy: An Observational Cross-Sectional Study, Daniel Barreto Rabelo, Ana Paula Coelho Figueira Freire, Fernanda Colen Milagres Brandão, Sabrina Oliveira Melo, Juliana M. Ocarino, Marco Tulio Saldanha Dos Anjos, Robert Schleip, Thales R. Souza, Guy G. Simoneau, Rafael Zambelli Pinto

Physical Therapy Faculty Research and Publications

Background

Assessment of myofascial tissue stiffness have a role in identifying physical impairments in plantar fasciopathy (PF). It is still unclear which specific functional and tissue differences exist between individuals with PF.

Aim

To compare myofascial stiffness of plantar fascia, Achilles tendon, and triceps surae between symptomatic and asymptomatic limbs in individuals with PF and between individuals with and without PF.

Methods

Thirty nine individuals diagnosed with PF and individuals with no history of PF were recruited. Myofascial stiffness of the plantar fascia, Achilles tendon, and triceps surae, range of motion, and clinical tests were performed. Mean difference (MD) and …

Muscle-Specific Contributions To Vertical Ground Reaction Force Profiles During Countermovement Jumps: Case Studies In College Basketball Players, Kristof Kipp, Hoon Kim

Exercise Science Faculty Research and Publications

The purpose of this study was to determine muscle-specific contributions to various types of vertical ground reaction force (vGRF) profiles in collegiate basketball players. Players from a men's (n = 5; height: 1.84 ± 0.14 m; mass: 92.8 ± 11.4 kg) and a women's (n = 5; 1.71 ± 0.09 m; mass: 80.1 ± 17.6 kg) basketball team completed 3–5 countermovement jumps (CMJ) while motion capture and force plate data were recorded. Muscle-specific contributions to vGRF were calculated through vGRF decomposition analysis. Profiles of vGRF were analyzed based on the presence of unimodal or bimodal peaks during the …

Impact Of Age And School Instruction Mode On Children’S Occupations Early In The Covid-19 Pandemic: A Longitudinal Survey Study, Samuel Nemanich, Gabriel M. Velez, Ann Millard, Anne Pleva

Occupational Therapy Faculty Research and Publications

Importance: The coronavirus disease 2019 (COVID-19) pandemic disrupted participation in routines and daily activities. It is unclear how children reengaged in activities during the pandemic, particularly as a new school year began. Differences in school instruction mode (in person, hybrid, or remote) during the pandemic could further affect activity participation.

Objective: To examine changes in sedentary and nonsedentary activity participation in children and to determine whether school instruction mode was associated with participation.

Setting: Home-based survey of U.S. residents.

Participants: Parents of 208 children (46.2% female) between ages 5 and 18 yr were surveyed at two waves: March through April …

“Handicap Removed”: An Alternative Path To The Social Model, Craig M. Rustici

Journal of Gender, Ethnic, and Cross-Cultural Studies

This article identifies an expression of a social model of disability in a 1966 film promoting Hofstra University’s Program for the Higher Education of the Handicapped and traces that model back to books published by the pioneering rehabilitation physician Henry H. Kessler in 1935 and 1947, decades before the UPIAS (Union of the Physically Impaired against Segregation) Fundamental Principles of Disability (1976). In light of Kessler’s articulation of social and minority models, identification of contrasting religious, charity and medical models, and discussion of disability stigma, this article reassesses Ruth O’Brien’s critique, in Crippled Justice (2001), of Kessler and the twentieth-century …

Running To The Beat: Does Listening To Music Affect Running Cadence And Lower Extremity Biomechanics?, Carolyn Meinerz, Jessica M. Fritz, Janelle A. Cross, Cody C. Dziuk, Kristof Kipp, Carole Vetter

Exercise Science Faculty Research and Publications

Background

Gait retraining can be effective in altering lower extremity biomechanics and reducing risk of injury. In attempts to alter running gait, previous studies used metronomes to manipulate cadence.

Research question

The aim of this study was to determine if manipulating running cadence via music could alter lower extremity biomechanics.

Methods

Eighteen runners ran at a self-selected speed (SS) and ran to music where the beats per minute (bpm) of the songs was increased by 5% (+5%) and 10% (+10%). Kinematic and kinetic data were collected with a motion capture system and a triaxial accelerometer. A one-way repeated measures analysis …

Localized Pain And Fatigue During Recovery From Submaximal Resistance Exercise In People With Fibromyalgia, Giovanni Berardi, Christine Eble, Sandra K. Hunter, Marie K. Hoeger Bement

Exercise Science Faculty Research and Publications

Objective

Exercise is recommended as a main treatment in fibromyalgia. However, many people have limited exercise tolerance and report exacerbated pain and fatigue during and following a bout of exercise. This study examined the local and systemic changes in perceived pain and fatigue during exercise and through the 3-day recovery following isometric and concentric exercises in people with and without fibromyalgia.

Methods

Forty-seven participants with a physician diagnosis of fibromyalgia (44 women; mean age [SD] = 51.3 [12.3] years; mean body mass index [SD] = 30.2 [6.9]) and 47 controls (44 women; mean age [SD] = 52.5 [14.7] years; mean …

Physical Function Across The Lifespan In Adults With Multiple Sclerosis: An Application Of The Short Physical Performance Battery, Brenda Jeng, Petra Šilić, Rachel E. Bollaert, Brian M. Sandroff, Robert W. Motl

Exercise Science Faculty Research and Publications

Background

Multiple sclerosis (MS) typically has its onset in early and middle adulthood, but the population is steadily becoming more dominated by older adults. One of the primary consequences of both MS and aging involves declines of lower extremity physical function and mobility. This cross-sectional study compared physical function status based on Short Physical Performance Battery (SPPB) summary and component scores between persons with MS and healthy controls across 6 age groups. We further examined associations between SPPB summary scores and component scores as well as associations between summary scores and measures of physical and cognitive function for identifying the …

Sex Differences In The Speed–Duration Relationship Of Elite Runners Across The Lifespan, Timothy J. Fulton, Christopher W. Sundberg, Blaine E. Arney, Sandra K. Hunter

Exercise Science Faculty Research and Publications

Purpose

To determine if the speed–duration relationship is altered with age and sex of elite Master’s runners.

Methods

The world’s top 10 performances for men and women in three events (800, 1500, and 5000 m) across six age groups (18–34 yr, 40–49 yr, 50–59 yr, 60–69 yr, 70–79 yr, and 80–89 yr) were analyzed from public data to establish theoretical models of the speed–duration relationship. Critical speed (CS) and the curvature constant (D′) were estimated by fitting the average speeds and performance times with a two-parameter hyperbolic model.

Results

Critical speed expressed relative to the 18- to 34-yr-olds, …

Cortical Effects Of Wrist Tendon Vibration During An Arm Tracking Task In Chronic Stroke Survivors: An Eeg Study, Dylan B. Snyder, Scott A. Beardsley, Allison S. Hyngstrom, Brian D. Schmit

Biomedical Engineering Faculty Research and Publications

The purpose of this study was to characterize changes in cortical activity and connectivity in stroke survivors when vibration is applied to the wrist flexor tendons during a visuomotor tracking task. Data were collected from 10 chronic stroke participants and 10 neurologically-intact controls while tracking a target through a figure-8 pattern in the horizontal plane. Electroencephalography (EEG) was used to measure cortical activity (beta band desynchronization) and connectivity (beta band task-based coherence) with movement kinematics and performance error also being recorded during the task. All participants came into our lab on two separate days and performed three blocks (16 trials …