Medicine and Health Sciences Commons^™

Fatigue Changes Biomechanical Variables In Drop Vertical Jump Performance In Competitive Basketball Players, Isabella Bruno, Caroline Linardos, Michala Rennels, Kristina Williams, Robin Dorociak, Jaydee Romick, Jason Brumitt

Student-Faculty Research - College of Physical Therapy

The drop vertical jump (DVJ) has been used as a tool to identify athletes at risk for injury. Initial studies have suggested an association between biomechanical variables and injury (1); however, subsequent research has demonstrated no relationship (2-4). Evaluating variables in fatigued athletes may help clinicians identify athletes at risk. Advances in motion capture technology now allow for assessment of variables after a fatigue protocol.

Does The Size-Weight Illusion Exist During Deadlift?, Dakota Kerbow, Luke Mallory, Robin Dorociak, Peter Jang, Andrew Meszaros

Student-Faculty Research - College of Physical Therapy

Purpose:

to assess whether the SWI exists during deadlift (whole body loading), and identify the mechanical factors that explain or overcome the illusion

Can Preseason Performance Tests Discriminate Injury Risk In Female Collegiate Volleyball Players, Justine Benner, Heidi Cooke, Colby Critchfield, Samantha Dunn, Sarah Eddy, Linda Froemming

Student-Faculty Research - College of Physical Therapy

Purpose: Prior research has demonstrated a 4-fold greater risk of a non-contact time-loss lower quadrant injury in collegiate female VB players (3). The purpose of this study was to validate effectiveness of functional performance tests to discriminate injury risk in female collegiate volleyball players.

Patellar Tendonopathy In Collegiate Volleyball Athletes, Justine Benner, Heidi Cooke, Colby Critchfield, Samantha Dunn, Sarah Eddy, Linda Foremming

Student-Faculty Research - College of Physical Therapy

Purpose: The first purpose was to identify the prevalence of patellar tendon abnormality in female collegiate volleyball players. The second purpose was to identify a potential association between kinetic measures during the drop vertical jump between those with tendon abnormality and those without in female collegiate volleyball athletes

Kinetic And Kinematic Analysis Of Male Collegiate Basketball Players With Patella Tendinosis, Dacia Heckendorf, Luke Hammer, Matthew Jeppson, Nicole Jones, Katherine Porter

Student-Faculty Research - College of Physical Therapy

Patellar tendinopathy (PT) occurs in approximately 40% of elite jumping athletes. Players will typically play through the pain; however, if the condition is not successfully treated some are forced to retire from sport. Research has shown that there are no signs of chemical inflammation in the tendon, but rather the presence of a degenerative tendon with collagen disorientation and disorganization.

Comparison Of Four Fitbit And Jawbone Activity Monitors With A Research-Grade Actigraph Accelerometer For Estimating Physical Activity And Energy Expenditure, Mary T. Imboden, Michael B. Nelson, Leonard A. Kaminsky, Alexander Hk Montoye

Faculty Publications - Department of Kinesiology

Background/aim Consumer-based physical activity (PA) monitors have become popular tools to track PA behaviours. Currently, little is known about the validity of the measurements provided by consumer monitors. We aimed to compare measures of steps, energy expenditure (EE) and active minutes of four consumer monitors with one research-grade accelerometer within a semistructured protocol.

Methods Thirty men and women (18–80 years old) wore Fitbit One (worn at the waist), Fitbit Zip (waist), Fitbit Flex (wrist), Jawbone UP24 (wrist) and one waist-worn research-grade accelerometer (ActiGraph) while participating in an 80 min protocol. A validated EE prediction equation and active minute cut-points were …

The Role Of Balance And Neck Strength In Youth Concussion, Chris Koch, Jenny Neudorfer, Peter Heuberger, Tel Winegar, Calvin Lee, Jarrett Fegel

Student-Faculty Research - College of Physical Therapy

Concussion: A concussion is a trauma-induced alteration in mental status that may or may not involve loss of consciousness; this can include a direct blow to the head or a blow to the body resulting in the head and brain moving quickly back and forth (1).

Current Screen: Current concussion screen consists of: symptom checklist, cognitive assessment known as Sport Concussion Assessment Tool (SCAT), and Balance Errors Scoring System (BESS) (2).

Purpose: The purpose of this study is to determine an assessment to screen an individual’s risk of sustaining a sport-related concussion.

Hypothesis: We hypothesized the SCAT 4, BESS, Four …

High Prevalence Of Nontraumatic Shoulder Pain In A Regional Sample Of Female High School Volleyball Athletes, Kayt E. Frisch

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Background: Shoulder pain is becoming increasingly problematic in young players as volleyball gains popularity. Associations between repetitive motion and pain and overuse injury have been observed in other overhand sports (most notably baseball). Studies of adult athletes suggest that there is a shoulder pain and overuse problem present in volleyball players, but minimal research has been done to establish rates and causes in juvenile participants.

Purpose: To establish rates of shoulder pain, regardless of whether it resulted in a loss of playing time, in female high school volleyball players. A secondary goal was to determine whether high repetition volumes correlated …

Are Preseason Functional And Biomechanical Measures Associated With Lower Quadrant Injury Risk In Division Iii Athletes?, Natalie Ellis, Jordan Petersen, Jordon Reyes, Victor Wilson, Cj Zita

Student-Faculty Research - College of Physical Therapy

A recent trend in sports medicine research is to determine risk of injury during sport based on preseason functional performance test (FPT) measures.

Equivocal findings associated with prior studies may leave PTs with uncertainty as to which FPT, or combination of FPTs, can best identify athletes who have a greater risk for injury.

Previous studies have utilized "low-tech" FPT measures: standing long jump (SLJ), single-leg hop (SLH), lower extremity functional test (LEFT), and the Y-balance test (YBT) (1,3,4).

These "low-tech" options may not be able to identify potential deficits that could be collected with "high-tech" measures (e.g., DVJ measures collected …

Critical-Thinking Skills Of First-Year Athletic Training Students Enrolled In Professional Programs, Dana K. Bates

Faculty Publications - Department of Kinesiology

Context: The Examination of Professional Degree Level document presented to the National Athletic Trainers’ Association Board of Directors states that research in athletic training education has not investigated differences in the critical-thinking skills of professional athletic training students.

Objective: Investigate the differences in critical thinking and other demographic variables across first-year athletic training students enrolled in professional bachelor’s- and master’s-degree programs.

Design: Quantitative study.

Setting: District 10 athletic training programs.

Patients or Other Participants: Students (N ¼ 40) enrolled within their first 6 months of a professional athletic training program were asked to complete the California Critical Thinking Skills Test …

The Lower-Extremity Functional Test And Lower-Quadrant Injury In Ncaa Division Iii Athletes: A Descriptive And Epidemiologic Report, Jason Brumitt, Bryan C. Heiderscheit, Robert C. Manske, Paul Niemuth, Alma Mattocks, Mitchell J. Rauh

Faculty Publications - College of Physical Therapy

Context: The Lower-Extremity Functional Test (LEFT) has been used to assess readiness to return to sport after a lower extremity injury. Current recommendations suggest that women should complete the LEFT in 135 s (average; range 120-150 s) and men should complete the test in 100 s (average; range 90-125 s). However, these estimates are based on limited data and may not be reflective of college athletes. Thus, additional assessment, including normative data, of the LEFT in sport populations is warranted. Objective: To examine LEFT times based on descriptive information and off-season training habits in NCAA Division III (Dill) athletes. In …

Perceptions From Athletic Training Students Involved In An Intentional Peer-Assisted Learning Pedagogy, Dana K. Bates

Faculty Publications - Department of Kinesiology

Context: Peer-assisted learning (PAL) has been shown to benefit students across educational levels. Current research has investigated perceptions of PAL, postgraduate impact, as well as prevalence. This study investigated athletic training students’ perceptions of an intentional PAL pedagogy on both the peer-student and peer-tutor. In this study, the peer-tutors had training prior to implementation.

Objective: To explore athletic training students’ perceptions of an intentional PAL pedagogy.

Design: Qualitative study using a phenomenological approach.

Setting: Focus group interviews with professional undergraduate athletic training students.

Patients or Other Participants: Eleven athletic training students from 1 accredited athletic training program volunteered for this …

Preventing Running Injuries Using A Pre-Running Exercise Program (Prep): A Pilot Study, P. Jaques, T. Mcgrath, K. Rasmussen, J. Irwin, J. Winslow, M. Strong, G. Macias, Tyler Cuddeford

Student-Faculty Research - College of Physical Therapy

Hypothesis: An 8 week supervised PREP implemented prior to a 5k running program will reduce the incidence of RRI's among novice runners training for a 5k below the previously published incidence rates.

Pre- And Post-Season Physical And Cognitive Testing Of College Athletes Susceptible To The Effects Of Concussion, Audrey Berning, Elsa Klump, Hannah Burkhart, Jeneca Thomas, Stephanie Cahill

Student-Faculty Research - College of Physical Therapy

No abstract provided.

Influence Of Tendon Tears On Ultrasound Echo Intensity In Response To Loading, Kayt E. Frisch, David Marcu, Geoffrey S. Baer, Darryl G. Thelen, Ray Vanderby

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Acoustoelastic (AE) ultrasound image analysis is a promising non-invasive approach that uses load-dependent echo intensity changes to characterize stiffness of tendinous tissue. The purpose of this study was to investigate whether AE can detect localized changes in tendon stiffness due to partial and full-thickness tendon tears. Ovine infraspinatus tendons with different levels of damage (Intact, 33%, 66% and full thickness cuts initiated on the articular and bursal sides) were cyclically loaded in a mechanical testing system while cine ultrasound images were recorded. The load-induced changes in echo intensity on the bursal and articular side of the tendon were determined. Consistent …

The Influence Of Partial And Full Thickness Tears On Infraspinatus Tendon Strain Patterns, Kayt E. Frisch, David Marcu, Geoffrey S. Baer, Darryl G. Thelen, Ray Vanderby

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Tears on the bursal and articular sides of the rotator cuff tendons are known to behave differently and strain is thought to play a role in this difference. This study investigates the effect of tear location on the changes in three strain measurements (grip-to-grip, insertion, and mid-substance tissue) in a sheep infraspinatus tendon model during axial loading. We introduced a 14mm wide defect near the insertion from either the articular or bursal side of the tendon to three depths (3 mm, 7mm & full) progressively. For each condition, tendons were sinusoidally stretched (4% at 0.5 Hz) while insertion and midsubstance …

Perceptions From Graduates Of Professional Athletic Training Programs Involved In Peer-Assisted Learning, Dana K. Bates

Faculty Publications - Department of Kinesiology

Context: Research has not explored how peer-assisted learning (PAL) impacts graduates once they are practicing as athletic trainers. Peer-assisted learning has been used in a variety of health education settings but there is a lack of data on its effects on the performance of graduates.

Objective: To investigate professional graduates’ perceptions of PAL pedagogy in their athletic training education and the impact of that experience on their first job.

Design: Qualitative study using a phenomenological approach.

Setting: One-on-one phone interviews with athletic training graduates.

Patients or Other Participants: Participants were from 8 accredited athletic training programs that varied in terms …

Interleukin Expression After Injury And The Effects Of Interleukin-1 Receptor Antagonist, Connie S. Chamberlain, Ellen M. Leiferman, Kayt E. Frisch, Stacey L. Brickson, William L. Murphy, Geoffrey S. Baer

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Ligament and tendon repair involves a complex series of coordinated events orchestrated by various cell types, cytokines and other factors. The repair process extends months to years and results in scar tissue mechanically inferior to native tissue. This is in clear contrast to tissue "regeneration" which would recapitulate the native tissue. Numerous approaches to stimulate a regenerative scenario have been attempted, including tissue-engineering, non-steroidal anti-inflammatories, ultrasonic, or electrical stimulation, but none have resulted in complete regeneration. In pursuit of a more regenerative outcome, it is important to understand the fundamentals of the normal healing process. Previous work from our lab …

Quantification Of Collagen Organization Using Fractal Dimensions And Fourier Transforms, Kayt E. Frisch, Sarah E. Duenwald-Kuehl, Hirohito Kobayashi, Connie S. Chamberlain, Roderic S. Lakes, Ray Vanderby Jr.

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Collagen fibers and fibrils that comprise tendons and ligaments are disrupted or damaged during injury. Fibrillogenesis during healing produces a matrix that is initially quite disorganized, but remodels over time to resemble, but not replicate, the original roughly parallel microstructure. Quantification of these changes is traditionally a laborious and subjective task. In this work we applied two automated techniques, fast Fourier transformation (FFT) and fractal dimension analysis (FA) to quantify the organization of collagen fibers or fibrils. Using multi-photon images of collagen fibers obtained from rat ligament we showed that for healing ligaments, FA differentiates more clearly between the different …

The Influence Of Macrophage Depletion On Ligament Healing, Connie S. Chamberlain, Ellen M. Leiferman, Kayt E. Frisch, Sijian Wang, Xipei Yang, Nico Van Rooijen, Geoff S. Baer, Stacey L. Brickson, Ray Vanderby

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Despite a complex cascade of cellular events to reconstruct damaged extracellular matrix (ECM), ligament healing results in a mechanically inferior, scar-like tissue. During normal healing, the number of macrophages significantly increases within the wound site. Then, granulation tissue expands into any residual, normal ligamentous tissue (creeping substitution), resulting in a larger region of healing, greater mechanical compromise, and an inefficient repair process. To study the effects of macrophages on the repair process, bilateral, surgical rupture of their medial collateral ligaments (MCLs) was done on rats. Treatment animals received liposome-encapsulated clodronate, 2 days before rupture to ablate phagocytosing macrophages. Ligaments were …

The Influence Of Interleukin-4 On Ligament Healing, Connie S. Chamberlain, Ellen M. Leiferman, Kayt E. Frisch, Sijian Wang, Xipei Yang, Stacey L. Brickson, Ray Vanderby

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

Despite a complex cascade of cellular events to reconstruct the damaged extracellular matrix, ligament healing results in a mechanically inferior scarred ligament. During normal healing, granulation tissue expands into any residual normal ligamentous tissue (creeping substitution), resulting in a larger region of healing, greater mechanical compromise and an inefficient repair process. To control creeping substitution and possibly enhance the repair process, the antiinflammatory cytokine, interleukin-4 (IL-4), was administered to rats before and after rupture of their medial collateral ligaments. In vitro experiments showed a time-dependent effect on fibroblast proliferation after IL-4 treatment. In vivo treatments with IL-4 (100 ng/mL IV) …

Ultrasound Echo Is Related To Stress And Strain In Tendon, Sarah Duenwald, Hirohito Kobayashi, Kayt E. Frisch, Roderic Lakes, Ray Vanderby Jr.

Faculty Publications - Biomedical, Mechanical, and Civil Engineering

The mechanical behavior of tendons has been well studied in vitro. A noninvasive method to acquire mechanical data would be highly beneficial. Elastography has been a promising method of gathering in vivo tissue mechanical behavior, but it has inherent limitations. This study presents acoustoelasticity as an alternative ultrasound-based method of measuring tendon stress and strain by reporting a relationship between ultrasonic echo intensity (B-mode ultrasound image brightness) and mechanical behavior of tendon in vitro. Porcine digital flexor tendons were cyclically loaded in a mechanical testing system while an ultrasonic echo response was recorded. We report that echo intensity …