David A Krause

Mayo Foundation for Medical Education and Research | MMS · Department of Physical Medicine and Rehabilitation

Purpose: We examined lexical sophistication of written personal statements from physical therapy applicants to determine whether recurrence quantification analysis (RQA) indices distinguish higher- versus lower-scored candidates and correlate with other admissions variables. Methods: Written personal statements were extracted from 152 applicatio...

IntroductionSensorimotor characteristics such as visual-motor reaction time (VMRT), peak force, and rate of force development (RFD) of the neck muscles play an important role in sports-related concussions (SRC). The purpose of this study was to establish reliability and sex differences of neck-specific VMRT and force characteristics of neck muscles...

Objective: To compare the validity indices of the King-Devick (KD) test in hockey players using any increase in test time over baseline to a 6-second increase as a positive concussion test. We hypothesized the KD test using the 6-second change would yield greater validity indices. Design: Prospective observational cohort study. Setting: Sports...

Neck strength characteristics are proposed to play an important role in sports-related concussion (SRC) in high school football players. The purpose of this study was to examine and compare neck strength characteristics between high school football players with and without a SRC history. A total of 19 players with SRC history (CONC) were matched wi...

Background: Slider exercises, which may use a gliding disc or "slider", are dynamic exercises used for strengthening. They are proposed to increase challenge as the friction between the body and ground is decreased which increases the demands on muscles of the weight bearing limb. Hypothesis and purpose: The purposes of this study were (1) to co...

Background Balance assessment is used by clinicians as part of athlete concussion screening. The King-Devick (K-D) Balance app is designed to provide an objective balance assessment value. The purpose of this study was to investigate the responsiveness of a balance assessment using the K-D Balance app. Hypothesis The K-D Balance app will demonstra...

Interprofessional education (IPE) is an important component of medical education, preparing students for the collaboration necessary for high-quality patient care. This study aimed to compare IPE readiness in pre-qualification physical therapy (PT) and medical (MD) students before and after an interprofessional workshop and identify factors influen...

Objectives: The Ice Hockey Summit III provided updated scientific evidence on concussions in hockey to inform these 5 objectives: (1) describe sport related concussion (SRC) epidemiology; (2) classify prevention strategies; (3) define objective, diagnostic tests; (4) identify treatment; and (5) integrate science and clinical care into prioritized...

Objectives The Ice Hockey Summit III provided updated scientific evidence on concussions in hockey to inform these five objectives: (1) describe sport related concussion (SRC) epidemiology, (2) classify prevention strategies, (3) define objective, diagnostic tests, (4) identify treatment and (5) integrate science and clinical care into prioritized...

The Ice Hockey Summit III provided updated scientific evidence on concussions in hockey to inform these five objectives: 1) describe sport-related concussion (SRC) epidemiology, 2) classify prevention strategies, 3) define objective, diagnostic tests, 4) identify treatment, and 5) integrate science and clinical care into prioritized action plans an...

Background:: Cervical muscle strength, proposed as a modifiable risk factor in concussions, can be assessed using various methods. The purpose of this study was to compare the reliability and force outputs of 3 methods that use handheld dynamometry (HHD) for assessing cervical muscle strength. Hypothesis:: All 3 testing methods are reliable, and...

Background: External rotation (ER) strengthening of the shoulder is an integral component of rehabilitative and preventative programs for overhead athletes. A variety of shoulder ER strengthening exercises are reported, including those intended to integrate the core musculature. The purpose of this study was to examine ER torque and electromyograp...

Background: The lunge is a closed kinetic chain exercise that athletes frequently use as part of training and rehabilitative programs. While typically performed on a stable surface, modifications include the use of balance platforms to create an unstable surface and suspension equipment. Suspension training exercises are theorized to be higher dem...

The purpose of this study was to assess the correlations of acceleration measurements between an instrumented hockey helmet and the Hybrid III headform and to determine whether collision with a broad surface affects the correlations between these data. A CCM Vector hockey helmet, instrumented with the Head Impact Telemetry System, was fitted onto a...

Objective: This review provides an update on sport-related concussion (SRC) in ice hockey and makes a case for changes in clinical concussion evaluation. Standard practice should require that concussions be objectively diagnosed and provide quantitative measures of the concussion injury that will serve as a platform for future evidence-based treat...

Objective: To examine the effect of a hockey neck laceration protector (NLP) on cervical range of motion (ROM) along with the athlete's perception on comfort and restrictiveness. Our hypothesis was that all styles of NLPs would limit cervical ROM compared to no NLP, and that certain designs of NLPs would be perceived as more restrictive and less c...

Medicine is increasingly focused on team-based practice as interprofessional cooperation leads to better patient care. Thus, it is necessary to teach teamwork and collaboration with other health care professionals in undergraduate medical education to ensure that trainees entering the workforce are prepared to work in teams. Gross anatomy provides...

To present currently known basic science and on-ice influences of sport related concussion (SRC) in hockey, building upon the Ice Hockey Summit I action plan (2011) to reduce SRC. The prior summit proceedings included an action plan intended to reduce SRC. As such, the proceedings from Summit I served as a point of departure, for the science and di...

The squat is a fundamental movement of many athletic and daily activities. Methods to clinically assess the squat maneuver range from simple observation to the use of sophisticated equipment. The purpose of this study was to examine the reliability of Coach's Eye (TechSmith Corp), a 2-dimensional (2D) motion analysis mobile device application (app)...

Objective: To evaluate the effectiveness of a variety of neck guard brands when contacted by a sharpened hockey skate blade. Design: Analytic experimental. Setting: Laboratory. Participants: Neck surrogate. Interventions: Forty-six samples of 14 different types of neck guards were tested on a custom-made laceration machine using a neck sur...

Purpose Assessment of hip internal rotation (IR) is a critical element in the evaluation of a painful hip, yet there currently exists no consistent method of determining this measurement. The purpose of this study is to report the intra-rater and inter-rater reliability of active and passive hip IR measurement using a digital inclinometer. Method...

Epidemiological sport injury research lacks relevance when all athletes are assumed to have equal time exposed to risk. Because athletes do not play equal minutes in ice hockey games, it is important to control for players' individual exposure times (IETs) when studying risk factors for injury. Cohort study. Hockey games. Twenty-eight Minnesota Jun...

Hip muscle impairments are associated with a variety of lower extremity dysfunctions. Accurate assessment in the clinical setting can be challenging due to the strength of hip muscles relative to examiner strength. To examine the influence of examiner strength and technique on manual hip strength testing using a handheld dynamometer. Repeated Measu...

Medical professionals and public consumers expect that new physical therapy graduates possess cognitive, technical, and behavioral skills required to provide safe and high-quality care to patients. The purpose of this study was to determine if a repertoire of ten professional behaviors assessed at the beginning of doctorate of physical therapy educ...

Ice hockey requires frequent skater crossovers to execute turns. Our investigation aimed to determine the effectiveness of training crossovers on a motorized, polyethylene, high-resistance flywheel. We hypothesized that high school hockey players training on the flywheel would perform as well as their peers training on ice. Participants were 23 mal...

The patient was a 24-year-old woman who was evaluated by a physical therapist in a direct-access sports medicine clinic for a chief complaint of right anterior arm pain and swelling. Given the unusual mechanism and location of the injury, significant pain and weakness, and questionable tissue defect, diagnostic ultrasound was ordered. The ultrasoun...

Pilates has been advocated for rehabilitation of breast cancer survivors despite little scientific evidence. The authors of this article have examined the feasibility of a Pilates program in postmastectomy breast cancer survivors and the impact on physical and psychological parameters. Fifteen breast cancer survivors were recruited in a one-arm stu...

The purpose of this study was to examine the relationship of off-ice performance measures with on-ice turning, crossover, and forward skating performance in high school male hockey players. Thirty-eight players aged 15-18 (mean age ± SD: 16.4 ± 1.1 years; height: 177.9 ± 6.8 cm; weight: 72.5 ± 8.9 kg) participated in this study. On-ice tests includ...

Purpose The primary purpose of this study was to investigate the intra-tester and inter-tester reliability of the dial test using a handheld digital inclinometer. Additionally, we examined the responsiveness of the test, and side-to-side differences for meaningful comparison. Materials/methods Twenty-four healthy subjects (22.5 ± 2.8 years) partici...

Human anatomy in physical therapy programs is a basic science course serving as a foundation for subsequent clinical courses. Integration of anatomy with a clinical emphasis throughout a curriculum provides opportunities for reinforcement of previously learned material. Considering the human cadaver laboratory as a fixed cost to our program, we sou...

Physical Therapy students at the College of Medicine, Mayo Clinic in Rochester, Minnesota receive instruction at the cadaver during a second year musculoskeletal course. In this issue of ASE Dr. Krause and his colleagues from the Doctoral Program in Physical Therapy share their experience developing a clinical skills course in a human gross anatomy...

To determine whether pre-injury hip muscle weakness is associated with the development of patellofemoral pain (PFP) in high school running athletes. Prospective cohort study. Academic institution sports medicine center. High school running athletes. Baseline hip strength of high school running athletes was assessed at the beginning of the running s...

Limited ankle DF (DF) range of motion (ROM) resulting from restricted gastrocnemius and soleus mobility is associated with a variety of lower extremity pathologies. Several techniques are used clinically to measure ankle DF. To evaluate the reliability and minimal detectable change of DF ROM measurement, determine whether there is a difference in m...

The action of muscles about joints can be explained through analysis of their spatial relationship. A functional model of these relationships can be valuable in learning and understanding the muscular action about a joint. A model can be particularly helpful when examining complex actions across multiple joints such as in the digital extensor mecha...

To learn about neck lacerations caused by skate blades in hockey. A retrospective Web-based survey and follow-up of registered USA Hockey players. Three hundred twenty-eight thousand eight hundred twenty-one of 457 038 registered USA Hockey players with a current e-mail address were contacted and invited to participate in the survey. Of 26 589 play...

Weight-bearing exercises are frequently used to train and strengthen muscles of the hip. These exercises have been advocated in the rehabilitation of a variety of hip and knee dysfunctions. Limited evidence is available to describe the level of muscle activation occurring with specific weight-bearing exercises. The purpose of this study was to inve...

Posterior calf stretching is believed to improve active ankle dorsiflexion range of motion (AADFROM) after acute ankle-inversion sprain. To describe AADFROM at baseline (postinjury) and at 2-wk time periods for 6 wk after acute inversion sprain. Randomized trial. Sports clinic. 11 men and 11 women (age range 11-54 y) with acute inversion sprain. St...

Reduced strength and activation of hip muscles might correlate with increased weight-bearing knee valgus. To describe relationships among frontal-plane hip and knee angles, hip-muscle strength, and electromyographic (EMG) recruitment in women during a step-down. Exploratory study. Laboratory. 20 healthy women 20 to 30 years of age. Interventions: F...

Interprofessional education (IPE) in clinical practice is believed to improve outcomes in health care delivery. Integrating teaching and learning objectives through cross discipline student interaction in basic sciences has the potential to initiate interprofessional collaboration at the early stages of health care education. Student attitudes and...

A 37-year-old male, referred to physical therapy by his physician, presented with a recent onset of left anterior hip and groin pain. Radiographs of the pelvis, left hip, and left femur were negative. After 2 weeks of rest and physical therapy, the patient was referred back to his physician for further investigation due to lack of improvement in sy...

Evidence supporting the use of personal interviews in admissions decisions for health professions programs is conflicting. This retrospective study was intended to (1) quantify interrater reliability for assessing performance on a particular type of structured interview, the behavioral interview, and (2) examine the ability of multiple preadmission...

Case report. Determining the cause of painful snapping on the lateral aspect of the knee can be a challenge. The differential diagnosis includes iliotibial band friction syndrome, lateral meniscus tear, intra-articular loose body, discoid lateral meniscus, snapping biceps femoris tendon, degenerative joint disease, proximal tibiofibular joint insta...

The aim of this study was twofold: (i) to describe the criterion-related validity of the sit-and-reach test (SRT) using a hand-held inclinometer when assessing hamstring muscle length (HML) when HML is recorded in degrees of hip joint angle (HJA); and (ii) to describe the effect of gender and age on HML in healthy adults during the performance of a...

To examine the reliability of clinical techniques for testing hip abductor and adductor muscle performance. Repeated measures. Academic laboratory. A sample of 21 healthy subjects (12 men, 9 women) between 22 and 31 years of age. Not applicable. Reliability of repeated measures was estimated by calculating intraclass correlation coefficients. Torqu...

Reference values for standing lumbar curvature (SLC) obtained via noninvasive methods are not well established in persons without current low back pain. The effect of gender is considered to have a significant effect on SLC with women having more lumbar lordosis than men. The effect of age and degree of obesity are not considered to have a statisti...

To describe abdominal muscle performance as measured by the double leg-lowering test (DLLT) in healthy subjects. Repeated measures. Academic laboratory. A sample of 100 healthy volunteers (50 men, 50 women; age range, 18-29 y). Not applicable. Repeat measurements of the DLLT to determine reliability and performance standards and to identify variabl...

Cross-sectional descriptive study. To examine the factors of gender and age, stratified by 10-year increments, on hamstring muscle length (HML) as measured by passive straight-leg raise (PSLR) and popliteal angle (PA). Differences in HML between men and women have not been examined for a large group of healthy adults over a wide range of ages. The...

To examine the reliability of a functional weight-bearing measure of hindfoot alignment, the standing tibiocalcaneal angle (STCA), and to compare the relative reliabilities of goniometrically and visually estimated STCAs. Prospective blinded comparison. Sports medicine center. Eighteen asymptomatic volunteer subjects (10 men, 8 women; age range, 22...

Masked randomized trial. To examine the effects of a 6-week program of static stretching of the calf muscle-tendon unit (MTU) on active ankle dorsiflexion range of motion (ADFROM) in healthy subjects. Static stretching of the calf MTU is often prescribed to increase flexibility in patients with shortened connective tissues or to maintain ADFROM in...