Digital Health Literacy and Social Determinants of Health Affecting Telehealth Use by Athletic Trainers

CONTEXT

While increasing telehealth use throughout sports medicine has improved patients' access to health care, some communities may not have the same opportunities to connect with a provider. Barriers to telehealth implementation can be influenced by internal (eg, provider's digital health literacy and resources) and external (eg, community's social determinants of health or "SDOH") factors. This study aimed to assess the impact of internal and external factors on telehealth use by athletic trainers (ATs).

DESIGN

Cross-sectional survey.

METHODS

In total, 767 ATs participated in the study. Participants (age = 39 [13] y) completed a survey containing the electronic health literacy scale and digital health literacy instrument, reported professional use of telehealth as a provider (yes/no), provided resources at their clinical site, and provided the zip code for the community they served. After data collection, the researchers extracted SDOH information using the zip code data from 2 US databases, including population density, median household income, poverty index, education level, and technology access. Chi-square or independent samples t tests were conducted to compare telehealth use by each SDOH factor.

RESULTS

In total, 62.3% (n = 478/767) of ATs reported using telehealth, and 81.6% of ATs (n = 626) had a dedicated facility to offer health care services. We identified a significant difference in digital health literacy scores between users and nonusers of telehealth (P = .013). We did not identify any significant differences between telehealth users by community type (P = .957), population density (P = .053), income (P = .462), poverty index (P = .073), and computer (P = .211) or broadband internet access (P = .295).

CONCLUSIONS

Our data suggest that internal factors such as digital health literacy and clinical site resources may have contributed to an AT's previous telehealth use in clinical practice. However, the SDOH data extracted from the community zip code where the AT provided clinical services were similar for those with and without previous telehealth use.

Attitudes and Beliefs of Wildland Firefighters Toward Occupational Health Services

CONTEXT

Wildland firefighters (WLFFs) are at an increased risk of health conditions, injuries, and illnesses related to sustained levels of intense physical activity. The purpose of this study was to identify and explore the current attitudes and beliefs of WLFFs regarding health services. Methods: We used consensual qualitative research design for this study. Participants engaged in an online, semistructured interview. Results: We identified four domains: (1) risk mitigation strategies, (2) culture of fire services, (3) access to health care services, and 4) identification of health care gap. Conclusions: Access to occupational health services for WLFFs is readily available in the form of emergency medical care. However, a lack of regular access to physical medicine and the continuation of care beyond acute treatment was apparent.

Collaborative Mental Health Care in Collegiate Athletics: Behavioral Health Providers' Perceived Role of the Athletic Trainer

CONTEXT

Developing effective interprofessional teams is vital to achieving quality care for those dealing with behavioral health concerns. Athletic trainers (ATs) play a vital role, as they are often the first health care providers to interact with student-athletes participating in intercollegiate athletics. However, research regarding how behavioral health providers view the AT's role on interprofessional behavioral health teams is limited.

OBJECTIVE

To explore behavioral health providers' perceived role of ATs in collaborative behavioral health care.

DESIGN

Qualitative study.

SETTING

Individual interviews.

PATIENTS OR OTHER PARTICIPANTS

Nine behavioral health care providers (women = 6, men = 3; age range = 30-59 years, years in clinical practice = 6-25) from National Collegiate Athletic Association Power 5 schools were interviewed.

DATA COLLECTION AND ANALYSIS

Participants were contacted via publicly available information on their university websites. Participants engaged in individual, audio-only interviews using a commercially available teleconferencing platform. All interviews were recorded, transcribed, and returned to participants for member checking. A phenomenological approach with inductive coding and multianalyst triangulation was performed to analyze the transcripts for common themes and subthemes.

RESULTS

CONCLUSIONS

Collaborative care models can enhance providers' abilities and maximize support of student-athlete wellness. In this study, we demonstrated that behavioral health providers working within a collaborative care model with ATs had overall positive experiences with such collaboration and that clear role delineation and responsibilities helped to foster high-quality patient care.

Experiences of Athletic Trainers in Tactical Athlete Settings When Managing Patients With Mental Health Conditions

CONTEXT

Researchers have demonstrated that job demands impair tactical athletes' mental health. Mental health stigmas in this population and limited resources may prevent individuals from receiving care. Athletic trainers (ATs) are often the first, and sometimes the only, contact for mental health concerns. Previous literature indicated that ATs desired more psychosocial training and experience.

OBJECTIVE

To investigate ATs' preparedness and experiences managing patients with mental health conditions in the tactical athlete setting.

DESIGN

Consensual qualitative research study.

SETTING

One-on-one, semistructured interviews.

PATIENTS OR OTHER PARTICIPANTS

Fifteen ATs (men = 7, women = 8; age = 36 ± 10 years; experience in tactical athlete setting = 4 years [range, 6 months-20 years]; military = 12, law enforcement = 2; fire service = 1).

MAIN OUTCOME MEASURE(S)

Interviews followed a 9-question protocol focused on job setting preparation, mental health training, and perceived role managing patients with mental health concerns. Interviews were audio recorded and transcribed verbatim. A 3-person coding team convened for data analysis following the consensual qualitative research tradition. Credibility and trustworthiness were established using a stability check, member checking, and multianalyst triangulation.

RESULTS

Four domains emerged surrounding ATs' mental health management experiences with tactical athletes: (1) population norms, (2) provider preparation, (3) provider context, and (4) structure of job responsibilities. Most ATs felt their educational experiences lacked comprehensive mental health training. Some participants described formal employer resources that were optional or mandatory for their job, whereas others engaged in self-education to feel prepared for this setting. Participants shared that unfamiliar experiences, such as divorce and deployment, influenced their context as providers. Most ATs had no policy related to mental health care and referral, indicating it was outside their responsibilities or they were unsure of role delineation.

CONCLUSIONS

For ATs working with tactical athletes, our respondents suggested that additional mental health education and training are necessary. They also indicated that improvement is needed in job structure regarding role delineation and the establishment of policies regarding behavioral health.

Differences in Access to Athletic Trainers in Public Secondary Schools Based on Socioeconomic Status

CONTEXT

Significant health care disparities exist in the United States based on socioeconomic status (SES), but the role SES has in secondary school athletes' access to athletic training services has not been examined on a national scale.

OBJECTIVE

To identify differences in access to athletic training services in public secondary schools based on school SES.

DESIGN

Cross-sectional study.

SETTING

Database secondary analysis.

PATIENTS OR OTHER PARTICIPANTS

Data for 3482 public high schools.

MAIN OUTCOME MEASURE(S)

Data were gathered from the Athletic Training Locations and Services (ATLAS) database, US Census Bureau, and National Center for Education Statistics. We included schools from 5 states with the highest, middle, and lowest poverty percentages (15 states total) and collected county median household income, percentage of students eligible for free or reduced-price lunch, race and ethnicity demographics, and access to athletic training services (full-time athletic trainer [AT], part-time AT only, no AT) for each school. Data were summarized in means, SDs, medians, interquartile ranges (IQRs), frequencies and proportions, 1-way analyses of variance, and Kruskal-Wallis tests.

RESULTS

Differences were present in school SES between schools with full-time, part-time-only, and no athletic training services. Schools with greater access to athletic training services had fewer students eligible for free or reduced-price lunch (full time: 41.1% ± 22.3%, part time only: 45.8% ± 24.3%, no AT: 52.9% ± 24.9; P < .001). Similarly, county median household income was higher in schools with increased access to athletic training services (full time median [IQR]: $56 026 [$49 085-$64 557], part time only: $52 719 [$45 355-$62 105], and no AT: $49 584 [$41 094-$57 688]; P < .001).

CONCLUSIONS

Disparities in SES were seen in access to athletic training services among a national sample of public secondary schools. Access to ATs positively influences student-athletes' health care across several measures. Pilot programs or government funds have been used previously to fund athletic training services and should be considered to ensure equitable access, regardless of school SES.

Core and Whole-Body Vibration Exercise Improve Military Foot March Performance in Novice Trainees: A Randomized Controlled Trial

INTRODUCTION

The purpose of the present study was to investigate core exercise training and whole-body vibration (WBV) as a training method to improve performance and recovery from an 8-km military foot march in novice trainees.

MATERIALS AND METHODS

A 3 × 5 repeated measures randomized control trial was used to evaluate the effects of core exercise training and WBV on performance and recovery from an 8-km foot march. Thirty-nine participants were randomized into three groups: core exercise (Ex), WBV with core exercise (WBVEx), and control. Each participant completed two 8-km foot marches (FM1 and FM2) with a 35 pound rucksack, separated by 4 weeks. Participants in the Ex and WBVEx groups completed 3 weeks of core exercise training, three times per week in between FM1 and FM2. Performance time, creatine kinase (CK), and interleukin-6 (IL-6) were measured. The Auburn University Institutional Review Board approved all aspects of this study (protocol number: 19-211 MR 1907).

RESULTS

Performance time (P < .001) and CK (P = .005) were significantly improved during FM2 as compared to FM1. The Ex (d = -0.295) and WBVEx (d = -0.645) treatments had a large effect on performance time. CK (P < .001) and IL-6 (P < .001) were significantly elevated at the completion of the foot march regardless of group. Only CK remained elevated for 2 days (P < .001) following the foot march.

CONCLUSIONS

Core exercise training with or without WBV improved 8-km foot march performance time by 5-6 minutes. The improvements are likely because of an increase in trunk stability. Additionally, this study showed that completing two identical foot marches a month apart increases performance and improves recovery.

Psychological Ownership in Athletic Training

CONTEXT

Psychological ownership (PO) is a state in which an individual feels possession over an object, organization, or entity (eg, PO over the organization where one works, PO over the profession one serves). Understanding PO could provide insight into the "vitality of the profession" as defined in the Prioritized Research Agenda for the Athletic Training Profession.

OBJECTIVE

To explore athletic trainers' (ATs') PO over their employing organizations and the athletic training profession.

DESIGN

Cross-sectional study.

SETTING

Web-based survey.

PATIENTS OR OTHER PARTICIPANTS

Clinically practicing ATs who were active members of the National Athletic Trainers' Association.

MAIN OUTCOME MEASURE(S)

Demographic variables, Psychological Ownership Questionnaire (POQ) scores, and Psychological Ownership Questionnaire for athletic training (POQ-AT) scores were the primary outcomes measured. Descriptive statistics were calculated for the demographic variables, POQ and POQ-AT overall scores, form scores, and dimension scores. Nonparametric tests were used to investigate differences between the POQ and POQ-AT by demographic characteristics.

RESULTS

The ATs indicated greater PO over the athletic training profession (Z = -3.45, P = .001) than over their employing organizations. They displayed greater belongingness (Z = -9.51, P < .001) and self-identity (Z = -8.71, P < .001) and less territoriality (Z = -5.52, P < .001) and accountability (Z = -5.33, P < .001) over their profession than their organization. Those ATs who supervised others had higher overall POQ (Mann-Whitney U test = 34 372, P < .001) and overall POQ-AT (U = 36 624, P = .014) scores than ATs who did not supervise others. A difference was evident in overall POQ (Kruskal-Wallis statistical analysis H4 = 20.47, P < .001) and overall POQ-AT (H4 = 21.34, P < .001) scores by years of experience.

CONCLUSIONS

Respondents indicated greater PO over their profession than their employing organizations. They demonstrated greater self-identity and belongingness and less territoriality and accountability over the athletic training profession than over their employing organization, suggesting that they were connecting aspirations and accomplishments with the profession but connecting duty and responsibility with their organizations. Years of experience and supervisor status may play roles in the level of organizational PO.

Athletic Trainers' Job Tasks and Status During the COVID-19 Pandemic: A Preliminary Analysis

CONTEXT

In December 2019, severe acute respiratory syndrome coronavirus 2, also known as the novel coronavirus disease 2019 (COVID-19), became a global public health crisis. Government officials in the United States subsequently responded by issuing lockdown orders that closed schools, terminated sports, and resulted in many people transitioning to working from home, immediately affecting the ability of athletic trainers (ATs) to practice clinically.

OBJECTIVE

To describe the job status, job duties, telemedicine use, and resiliency of ATs during the COVID-19 pandemic.

DESIGN

Cross-sectional study.

SETTING

Mixed-methods survey.

PATIENTS OR OTHER PARTICIPANTS

A total of 611 ATs (age = 32 ± 13 years).

MAIN OUTCOME MEASURE(S)

The survey consisted of 6 demographic questions, a job status assessment (3 questions, 1 open-ended prompt), a telemedicine use assessment (5 questions, 2 open-ended prompts), and the 6-item Brief Resilience Scale. Qualitative analyses were completed using Text iQ technology and descriptive statistics, and cross-tabulations were conducted using follow-up χ2 comparisons of resiliency with job setting and telemedicine use.

RESULTS

Most ATs continued to work in some capacity throughout the COVID-19 pandemic and expressed optimism about the likelihood that their job status and setting would return. However, participants shared financial and mental health concerns because of reduced pay, stress, and uncertainty about the future. We also identified versatility within the profession, as ATs were serving in new roles related to COVID-19 or adopting telemedicine (n = 251, 41.1%). Athletic trainers were implementing all domains of clinical practice using telemedicine, yet most did not consult legal counsel on or have formal training in the delivery method before implementation. Finally, most ATs exhibited normal resilience that was not affected by job setting (χ2 = 26.901, P = .68) or the use of virtual health care (χ2 = 2.597, P = .27).

CONCLUSIONS

The COVID-19 pandemic has affected ATs' jobs, and in many cases, the ATs have demonstrated adaptability and value in assuming various roles in the larger health care system.

Core and Whole Body Vibration Exercise Influences Muscle Sensitivity and Posture during a Military Foot March

Military foot marches account for 17-22% of Army musculoskeletal injuries (MSI), with low back pain (LBP) being a common complaint. Core-exercise and whole-body vibration (WBV) have been shown to decrease LBP in patients with chronic low back MSI. This study investigated if WBV and/or core-exercise influenced LBP or posture associated with a military ruck march. A randomized control trial with three groups: (1) WBV and core-exercise (WBVEx); (2) core-exercise alone (Ex); and (3) control evaluated the effects of core-exercise and WBV on LBP during/after a two 8 K foot marches with a 35 lb rucksack. The intervention groups completed three weeks of core-exercise training with/without WBV. Outcome measurements included visual analog scale (VAS), algometer, posture and electromyography (EMG). LBP, pressure threshold, and posture were elevated throughout the foot march regardless of group. LBP remained elevated for 48 h post foot march (p = 0.044). WBVEx and Ex did not have a significant effect on LBP. WBVEx and Ex both decreased muscle sensitivity and increased trunk flexion (p < 0.001) during the second foot march (FM2). The 8 K foot marches significantly increased LBP. Core-exercise training with/without WBV decreases low back muscle sensitivity. WBV and core-exercise increases trunk flexion which may help improve performance and may influence LBP.

The promotion of injury and illness prevention and reporting in the fire service

BACKGROUND

Injury prevention interventions are limited in the fire service due to a lack of widespread implementation and underreporting. This creates a significant challenge to improving occupational health.

OBJECTIVE

To determine how fire chiefs are promoting reporting and the prevention of physical and mental injuries and illnesses.

METHODS

We used an open-ended, qualitative instrument to assess the presence of prevention programs and actions to promote injury and illness reporting in the fire service. The instrument contained six content validated items related to the promotion of prevention interventions and reporting.

RESULTS

A total of 54 fire chiefs (age = 51±8y; females = 4, males = 50, years of experience as fire chief = 7±6y) responded to the instrument. A majority (n = 37/54, 68.5%) of the fire chiefs indicated their department had an established health and wellness program. Most fire chiefs reported using established guidelines, education, and a supportive culture to promote prevention and reporting. The cultural stigma of being a firefighter and fear of repercussions were barriers to the promotion of reporting of illness and injury. Fire chiefs stated that they struggled to find ways to effectively promote reporting and prevention strategies.

CONCLUSIONS

The success of a fire chief's promotional efforts was greater in instances where multiple factors were addressed.

Telemedicine Experiences of Athletic Trainers and Orthopaedic Physicians for Patients With Musculoskeletal Conditions

CONTEXT

Telemedicine is the delivery of medical care from a distance using technology. The integration of telemedicine as a supplement to musculoskeletal-based patient encounters may be feasible in sports medicine.

OBJECTIVE

To investigate health care professionals' perceptions of and experiences with telemedicine.

DESIGN

Cross-sectional explanatory sequential mixed-methods study.

PATIENTS OR OTHER PARTICIPANTS

A purposeful sample of 17 athletic trainers from a National Collegiate Athletic Association Division I institution and 5 orthopaedic physicians from a sports medicine clinic located 92 miles from the campus.

INTERVENTION(S)

Participants were trained on the telemedicine platform and used it over 5 months for initial, follow-up, and discharge patient encounters.

MAIN OUTCOME MEASURE(S)

Participants completed a preintervention survey containing the Theory of Planned Behavior and Technology Acceptance Model tool. Responses were analyzed using descriptive statistics and an independent-samples t test. After the intervention period, participants completed individual semistructured interviews that we coded using the consensual qualitative research tradition.

RESULTS

From the interviews, the clinicians were characterized as telemedicine adopters (n = 14) or nonadopters (n = 8). The adopters reported higher levels of agreement on the Theory of Planned Behavior and Technology Acceptance Model tool as compared with nonadopters for all constructs. When comparing adoption status, we identified a difference (P < .01), with nonadopters reporting a low level of agreement for the subjective norm construct. The interviews revealed 5 domains: integration challenges, integration opportunities, collaborative practice, anticipatory socialization to future use, and benefits of integration. The participants indicated that integration challenges centered on "buy in," whereas opportunities aligned with the patient's condition and technology ease of use. They reflected that the telemedicine encounters required more preparation and yet allowed for cooperative behaviors between clinicians. The benefits of telemedicine included convenience and scheduling preferences that encouraged future use.

CONCLUSIONS

The integration of telemedicine in sports medicine brought about both challenges and opportunities for collaboration among athletic trainers and physicians that were heavily predetermined by the social pressures of colleagues.

Functional Performance of Firefighters After Exposure to Environmental Conditions and Exercise

CONTEXT

Slips, trips, and falls are leading causes of musculoskeletal injuries in firefighters. Researchers have hypothesized that heat stress is the major contributing factor to these fireground injuries.

OBJECTIVE

To examine the effect of environmental conditions, including hot and ambient temperatures, and exercise on functional and physiological outcome measures, including balance, rectal temperature, and perceived exertion.

DESIGN

Randomized controlled clinical trial.

SETTING

Laboratory environmental chamber.

PATIENTS OR OTHER PARTICIPANTS

A total of 13 healthy, active career firefighters (age = 26 ± 6 years [range = 19-35 years], height = 178.61 ± 4.93 cm, mass = 86.56 ± 16.13 kg).

INTERVENTION(S)

Independent variables consisted of 3 conditions (exercise in heat [37.41°C], standing in heat [37.56°C], and exercise in ambient temperature [14.24°C]) and 3 data-collection times (preintervention, postintervention, and postrecovery). Each condition was separated from the others by at least 1 week and lasted a maximum of 40 minutes or until the participant reached volitional fatigue or a rectal temperature of 40.0°C.

MAIN OUTCOME MEASURE(S)

Firefighting-specific functional balance performance index, rectal temperature, and rating of perceived exertion.

RESULTS

Exercise in the heat decreased functional balance, increased rectal temperature, and altered the perception of exertion compared with the other intervention conditions.

CONCLUSIONS

A bout of exercise in a hot, humid environment increased rectal temperature in a similar way to that reported in the physically active population and negatively affected measures of functional balance. Rather than independently affecting balance, the factors of exercise and heat stress appeared to combine, leading to an increased likelihood of slips, trips, and falls.

The effect of structural firefighter protective clothing systems on single-legged functional hop test scores

BACKGROUND

Firefighters must complete a physical ability test to assess work readiness. There is a lack of understanding of how personal protective clothing (PPC) affects functional performance tests for work readiness, e.g. Triple Hop for Distance (THD) and Triple Hop for Work (THW).

OBJECTIVE

To examine firefighter PPC's effect on the THD and THW measures.

METHODS

Thirty-one healthy, untrained participants (male = 20, female = 11; age = 23±3 years; height = 175.30± 11.12 cm; mass = 77.94±14.24 kg; mass in PPC = 89.14±14.68 kg) completed three successful trials of the THD on their dominant and non-dominant leg, with and without PPC. The main outcome measures included maximum and mean distances on the THD with and without PPC and THW.

RESULTS

We identified a significant decrease in THD measures (mean difference = 97.83 cm; p <  0.001) and THW measures (mean difference = -326.61J; p <  0.001) when donning PPC in the dominant leg. We identified a significant decrease in THD (mean difference = 121.48 cm; p <  0.001) and THW (mean difference = 493.15J; p <  0.001) for females, and a significant difference for THD (mean difference = 84.83 cm; p <  0.001) for males when donning PPC.

CONCLUSIONS

The addition of PPC decreased the THD and THW measures. The additional mass of the PPC required the more energy to move the same distance without the PPC.

Lesbian, Gay, Bisexual, Transgender, and Queer Patients: Collegiate Athletic Trainers' Perceptions

CONTEXT

Research suggests that patients who identify as lesbian, gay, bisexual, transgender, or queer (LGBTQ) are at risk for certain conditions and denied equal access to health care in physician offices compared with their heterosexual counterparts. However, little evidence exists regarding the treatment of LGBTQ student-athlete patients in the athletic training clinic and the role the athletic trainer (AT) plays in these health care experiences.

OBJECTIVE

To explore the perceptions of ATs treating LGBTQ student-athlete patients.

DESIGN

Cross-sectional study.

SETTING

Web-based survey.

PATIENTS OR OTHER PARTICIPANTS

A total of 1077 collegiate and university ATs completed the survey (5685 e-mails distributed, 1214 surveys started, access rate = 21.4%, completion rate = 88.7%).

MAIN OUTCOME MEASURE(S)

Demographic information and level of agreement in 3 areas (approach, quality of care, and comfort) were obtained on a 5-point Likert scale. We asked ATs their likeliness of providing guidance to student-athletes about navigating their sexuality generally and as it related to athletic participation, if they thought they provided equal health care to a student-athlete who identified as LGBTQ, how comfortable they were treating LGBTQ student-athlete patients, and how comfortable they thought student-athlete patients would be seeking care from them or from providers in their clinic.

RESULTS

Overall, we found differences among groups for sexual orientation, gender, religion, and the existence of interpersonal contact with LGBTQ friends or family for approach, quality of care, and comfort. We also identified 2 main themes indicating ATs' desire for more training and education, specifically in caring for transgender student-athletes and providing patient-centered care with professionalism, regardless of gender identity or sexual orientation.

CONCLUSIONS

Although differences existed among demographic groups, ATs had a generally positive view of treating LGBTQ student-athlete patients and wanted more training and education on the specific needs of this population.

The Use of Patient-Reported Outcome Measures: Secondary School Athletic Trainers' Perceptions, Practices, and Barriers

CONTEXT

Incorporating patient-reported outcomes (PROs) into daily routine is essential for patient-centered clinical practice. Secondary school athletic trainers (ATs) may encounter unique barriers that limit their willingness to use PROs.

OBJECTIVE

To explore how secondary school ATs who were using PROs perceived their application, benefits, and problems compared with those who did not.

DESIGN

Cross-sectional study.

SETTING

Web-based survey.

PATIENTS OR OTHER PARTICIPANTS

A total of 2984 secondary school ATs received an e-mail invitation, and 322 completed the survey (response rate = 10.8%). Respondents were 43 ± 10 years old, with most indicating at least 11 years as a Board of Certification-certified AT (n = 276, 85.7%).

MAIN OUTCOME MEASURE(S)

The ATs were invited to complete a Web-based survey regarding the uses and benefits of and problems with PROs. Those using PROs in clinical practice were asked their criteria for selecting the measures, whereas those not using PROs were asked their reasons for not using them. Dependent variables were endorsements of uses and benefits of and problems with PROs.

RESULTS

The most commonly cited uses of PROs were determining treatment effectiveness (193/264, 73%) and demonstrating effectiveness to administration (174/264, 66%). Improving communication with the patient (267/296, 90%) and helping to direct the plan of care (256/297, 86%) were the most frequently endorsed benefits of PROs. Time to score and analyze (152/284, 53%) and time for patients to complete (134/284, 47%) PROs were the problems encountered most often. For ATs not using PROs (223/262, 85%), the most frequent reason was the lack of a support structure (102/219, 46%). For ATs using PROs (39/262, 15%), quick completion times (32/39, 82%) was the most common criterion used to select individual measures.

CONCLUSIONS

A majority of secondary school ATs recognized the benefits of PROs and yet did not use them in clinical practice due to setting-specific barriers.

Lesbian, Gay, Bisexual, Transgender, and Queer Athletic Trainers: Collegiate Student-Athletes' Perceptions

CONTEXT

Lesbian, gay, bisexual, transgender, and queer (LGBTQ) athletic trainers (ATs) face uncertain acceptance in the workplace.

OBJECTIVE

To examine the perceptions of National Collegiate Athletic Association (NCAA) student-athletes toward ATs who identified as LGBTQ.

DESIGN

Cross-sectional design.

SETTING

Web-based survey.

PATIENTS OR OTHER PARTICIPANTS

A total of 623 (males = 212, females = 403, other = 8; age = 19.7 ± 1.4 years) NCAA student-athletes completed the survey.

MAIN OUTCOME MEASURE(S)

Participants completed a 19-item survey to assess their perceptions about the appropriateness of, quality of care from, and comfort with ATs who identified as LGBTQ. We asked 10 demographic questions and 2 questions regarding the student-athlete's exposure to individuals who identified as LGBTQ. Five matrix questions had 5 stems each to represent LGBTQ individuals on a 5-point Likert scale (1 = strongly disagree, 5 = strongly agree) and 2 open-ended questions elicited qualitative data. We analyzed characteristics of central tendency to evaluate the level of appropriateness, quality of care, and level of comfort perceived by student-athletes of ATs who identified as LGBTQ. We used Mann-Whitney U and Kruskal-Wallis tests for post hoc analyses where appropriate. We used grounded theory to identify themes in the answers to the open-ended questions.

RESULTS

Participants indicated they would seek health care and would feel comfortable approaching an AT who identified as LGBTQ. Participants agreed it was appropriate for an LGBTQ AT to work with both male and female sports and did not agree that health care provided by heterosexual and LGBTQ ATs differed. The open-ended responses revealed 4 themes: professionalism, upbringing, situational concerns, and concerns about specific populations that affected their perceptions.

CONCLUSIONS

In general, the NCAA student-athletes had positive perceptions of ATs who identified as LGBTQ.

Local Pressure Application Effects on Neurological and Circulatory Function

BACKGROUND

Pain and discomfort reported during sitting is a significant problem for aviators during prolonged missions. Previous work has determined that areas of local pressure exist during prolonged sitting in UH-60 seat systems; however, no work has examined the effects of this local pressure on measures of neurological and circulatory function.

METHODS

A total of 30 healthy subjects completed the study in which focal pressure was applied in three conditions (no pressure, pressure to the ischial tuberosity, and pressure to the posterior thigh). We applied pressure using a purpose-built pressure application system allowing subjects to sit in a position mimicking the sitting position in a UH-60 Black Hawk helicopter and measurements were taken before, during, and after pressure application. We measured neurological function with the soleus Hoffmann reflex and sural nerve conduction velocity, and circulatory function with dynamic infrared thermography.

RESULTS

We found a decrease in soleus Hoffmann reflex by 0.87 V and 0.52 V during pressure application at the posterior thigh and ischial tuberosity, respectively. No changes in nerve conduction velocity were found among the conditions during or after pressure application. Limb temperature increased 0.42-0.44°C during pressure application, but began to return to baseline once pressure was removed.

DISCUSSION

This study examined the development of neurological and circulatory alterations due to local pressure application in an aviation specific functional position. These results may be used in the development of future interventions to mitigate the negative effects of localized pressure in military aviators.Games KE, Lakin JM, Quindry JC, Weimar WH, Sefton JM. Local pressure application effects on neurological and circulatory function. Aerosp Med Hum Perform. 2018; 89(8):693-699.

Prevention of Knee and Anterior Cruciate Ligament Injuries Through the Use of Neuromuscular and Proprioceptive Training: An Evidence-Based Review

Reference/Citation:  Donnell-Fink LA, Klara K, Collins JE, et al. Effectiveness of knee injury and anterior cruciate ligament tear prevention programs: a meta-analysis. PLoS One. 2015;10(12)e0144063.

CLINICAL QUESTION

  Is neuromuscular and proprioceptive training effective in preventing knee and anterior cruciate ligament (ACL) injuries?

DATA SOURCES

  The authors searched CINAHL, Cochrane Central Register of Controlled Trials, MEDLINE/EMBASE, PubMed, and Web of Science databases from 1996 through December 2014 and limited the results to peer-reviewed manuscripts published in English. Search terms for all databases were knee injury OR knee injuries; OR anterior cruciate ligament injury OR anterior cruciate ligament injuries; OR ACL injury OR ACL injuries; OR lower limb injury OR lower limb injuries AND prevention.

STUDY SELECTION

  Inclusion criteria were (1) English language, (2) published from 1996 through 2014, (3) the intervention used neuromuscular or proprioceptive training to prevent knee or ACL injuries, (4) human participants, (5) the incidence of knee or ACL injury was provided.

DATA EXTRACTION

  For the articles that met the inclusion criteria, 2 authors worked independently using the Jadad scale to extract the first author, year of publication, title, sport type, participant sex, participant age, country in which the study was conducted, number of participants in the control and intervention groups, intervention characteristics or components, and knee or ACL injury outcome.

MAIN RESULTS

  A total of 24 studies with 1093 participants were included in this review. Intervention efficacy was determined from weighted incidence rate ratios. After the intervention of neuromuscular and proprioceptive training exercises, the incidence ratio (frequency of a disease or injury occurrence in a population over a specific time frame) was calculated at 0.731 (95% confidence interval = 0.614, 0.871) for knee injury and at 0.493 (95% confidence interval = 0.285, 0.854) for ACL injury. This indicated a link between neuromuscular and proprioceptive training programs and injury reduction. No significant correlation was present between more components added to training and a greater decrease in injury to either the knee or ACL.

CONCLUSIONS

  Neuromuscular and proprioceptive training appeared to decrease the incidence of injury to the knee and specifically the ACL. However, no evidence suggested that a specific group of exercises was better than others.

Proprioceptive Training for the Prevention of Ankle Sprains: An Evidence-Based Review

Reference:  Schiftan GS, Ross LA, Hahne AJ. The effectiveness of proprioceptive training in preventing ankle sprains in sporting populations: a systematic review and meta-analysis. J Sci Med Sport. 2015;18(3):238-244.

CLINICAL QUESTION

  Does the use of proprioceptive training as a sole intervention decrease the incidence of initial or recurrent ankle sprains in the athletic population?

DATA SOURCES

  The authors completed a comprehensive literature search of MEDLINE, CINAHL, SPORTDiscus, and Physiotherapy Evidence Database (PEDro) from inception to October 2013. The reference lists of all identified articles were manually screened to obtain additional studies. The following key words were used. Phase 1 population terms were sport*, athlet*, and a combination of the two. Phase 2 intervention terms were propriocept*, balance, neuromusc* adj5 train*, and combinations thereof. Phase 3 condition terms were ankle adj5 sprain*, sprain* adj5 ankle, and combinations thereof.

STUDY SELECTION

  Studies were included according to the following criteria: (1) the design was a moderate- to high-level randomized controlled trial (>4/10 on the PEDro scale), (2) the participants were physically active (regardless of previous ankle injury), (3) the intervention group received proprioceptive training only, compared with a control group that received no proprioceptive training, and (4) the rate of ankle sprains was reported as a main outcome. Search results were limited to the English language. No restrictions were placed on publication dates.

DATA EXTRACTION

  Two authors independently reviewed the studies for eligibility. The quality of the pertinent articles was assessed using the PEDro scale, and data were extracted to calculate the relative risk. Data extracted were number of participants, intervention, frequency, duration, follow-up period, and injury rate.

MAIN RESULTS

  Of the initial 345 studies screened, 7 were included in this review for a total of 3726 participants. Three analyses were conducted for proprioceptive training used (1) to prevent ankle sprains regardless of history (n = 3654), (2) to prevent recurrent ankle sprains (n = 1542), or (3) as the primary preventive measure for those without a history of ankle sprain (n = 946). Regardless of a history of ankle sprain, participants had a reduction in ankle-sprain rates (relative risk [RR] = 0.65, 95% confidence interval [CI] = 0.55, 0.77; numbers needed to treat [NNT] = 17, 95% CI = 11, 33). For individuals with a history of ankle sprains, proprioceptive training demonstrated a reduction in repeat ankle sprains (RR = 0.64, 95% CI = 0.51, 0.81; NNT = 13, 95% CI = 7, 100). Proprioceptive training as a primary preventive measure demonstrated significant results (RR = 0.57, 95% CI = 0.34, 0.97; NNT = 33, 95% CI = 16, 1000).

CONCLUSIONS

  Proprioceptive training programs were effective in reducing the incidence rates of ankle sprains in the athletic population, including those with and those without a history of ankle sprains.

Clinician-Friendly Physical Performance Tests for the Knee

Reference:  Hegedus EJ, McDonough S, Bleakley C, Cook CE, Baxter GD. Clinician-friendly lower extremity physical performance measures in athletes: a systematic review of measurement properties and correlation with injury. Part 1: the tests for knee function including the hop tests. Br J Sports Med. 2015;49(10):642-648.

CLINICAL QUESTION

  Do individual physical performance tests (PPTs) used as measures for lower extremity function have any relationship to injuries in athletes aged 12 years or older?

DATA SOURCES

  Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were used to locate articles. The authors searched PubMed, EMBASE, and SPORTDiscus, in addition to searching by hand. The search strategy combined the terms athlete, lower extremity, and synonyms of performance test with the names of performance tests.

STUDY SELECTION

  Studies were included if they involved a test that met the operational definition for a PPT. The included studies assessed components of sport function (eg, speed, agility, and power), determined readiness for return to sport, or predicted injury to the lower extremity. All PPT measures could be performed on the field, courtside, or in a gym with affordable, portable, and readily available equipment. Studies were excluded if they made use of 3-dimensional motion capture, force platforms, timing gates, treadmills, stationary bikes, metabolic charts, or another nonportable, costly testing device. Athletes were categorized on the Tegner Scale at a minimum of level 5, which is the lowest level that still encompasses competitive athletes. Studies were included if 50% or more of the participants were rated above 5 on the Tegner Scale. Studies were excluded if the sole purpose was to judge movement quality or range of motion. Studies were selected if they identified the knee or a knee injury as a focal point of the paper.

DATA EXTRACTION

  The Consensus-Based Standards for the Selection of Health Measurement Instruments (COSMIN) was used to critique the methodologic quality of each paper with a 4-point Likert scale. The title and methods of each paper were extracted. Extracted data were summarized using ratings of unknown, conflicting, limited, moderate, and strong.

MAIN RESULTS

  An initial search revealed 3379 original articles for consideration. After initial review, 169 full-text articles were evaluated and 29 articles were included in the systematic review. Six tests were examined for the best evidence of methodologic quality: (1) 1-legged single hop for distance, (2) 1-legged triple hop for distance, (3) 6-m timed hop, (4) crossover hop for distance, (5) triple jump, and (6) 1-legged vertical jump. A summary of the methodologic properties of the 6 tests showed fair/poor reliability, fair/poor hypothesis testing, good criterion validity, and good/poor responsiveness. No tests predicted knee injury in athletes.

CONCLUSIONS

  Although numerous authors have evaluated PPTs at the knee, evidence for the measurement quality of these functional tests is limited and conflicting. Ample opportunity exists for researchers to further examine PPTs for the knee. Until more knowledge is gained about these PPTs, clinicians should exercise caution when making clinical decisions based on the results of these tests.

Clinician-Friendly Physical Performance Tests for the Hip, Ankle, and Foot

Reference:  Hegedus EJ, McDonough SM, Bleakley C, Baxter D, Cook CE. Clinician-friendly lower extremity physical performance tests in athletes: a systematic review of measurement properties and correlation with injury. Part 2: the tests for the hip, thigh, foot, and ankle including the Star Excursion Balance Test. Br J Sports Med. 2015;49(10):649-656.

CLINICAL QUESTION

  Do individual physical performance tests (PPTs) for the lower extremity have any relation to injury in athletes 12 years of age and older?

DATA SOURCES

  The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed to locate articles. Three databases were searched from inception to January 13, 2014: PubMed, CINAHL, and SPORTDiscus. Search phrases were sport, athletics, athletes, and injuries combined with strength, power, endurance, agility, and function. Reference lists of all remaining articles and personal collections of the authors were then reviewed for any missing articles.

STUDY SELECTION

  Studies were included according to the following criteria: (1) published in English, (2) presented as complete articles (ie, no abstracts or posters), and (3) involved human participants. Studies were excluded on the following criteria: (1) a combination of PPTs was examined, (2) the results were measured using equipment that was expensive or not readily available to the average clinician, (3) the PPTs examined impairment-level data, (4) the PPTs examined tasks not relevant to the lower extremity, or (5) the participants scored 4 or less on the Tegner Activity Scale. The final analysis involved 31 studies.

DATA EXTRACTION

  The name of the PPT and methods were extracted. Each PPT was then critiqued using the Consensus-Based Standards for the Selection of Health Measurement Instruments, a 4-point Likert scale. Data were also summarized using a score of unknown, strong, moderate, limited, or conflicting for the best evidence synthesis.

MAIN RESULTS

  A total of 14 PPTs were examined; however, names and methods of the PPTs were inconsistent throughout the literature. In descending order, based on frequency of appearance in the literature, the PPTs were (1) 1-legged hop for distance, (2) vertical jump, (3) Star Excursion Balance Test, (4) shuttle run, (5) 6-m timed hop, (6) triple hop, (7) 40-yd sprint, (8) triple crossover hop for distance, (9) 6-m timed crossover hop, (10) T-agility, (11) hexagon hop, (12) medial hop, (13) lateral hop, and (14) multi-stage fitness (beep test). The Star Excursion Balance Test in the anterior, posteromedial, and posterolateral directions was the only test that could help identify injury risk. The 1-legged hop for distance and hexagon hop showed a moderate ability to differentiate between normal and unstable ankles. In dancers, the medial hop in dancers differentiated between painful and normal hips with moderate evidence.

CONCLUSIONS

  Very little evidence supports the use of PPTs for athletes with lower extremity injuries. A panel of experts needs to standardize the names and methods of widely accepted tests.

Orchard Sports Injury Classification System 10.1 Plus: An End-User Study

The purpose of this study was to establish the level of ease of use and effectiveness of the Orchard Sport Injury Classification System (OSICS) 10.1 Plus for recording injuries and interventions. Three hundred and forty-two (males=148, females=192, no response=2; age=30.9±9.5y; experience=9.1±10.5y) athletic trainers (ATs) in the United States completed the survey. Participants were primarily employed in the secondary school (n=135) or collegiate setting (n=171). Participants entered system includes the OSICS 10.1 to catalog injuries and Current Procedural Terminology (CPT) codes to document interventions. Participants completed an 18-item end-user evaluation to assess the ease of use and effectiveness of the OSICS 10.1 Plus (5-point Likert scale). Participants indicated that the OSICS 10.1 Plus is overall easy to use (4.1±0.7pts), easy to enter an injury (4.1±0.8pts), and easy to enter the associated interventions (3.9±0.8pts). Respondents were neutral about whether the OSICS 10.1 Plus matched their current injury (3.5±1.0pts) or intervention (3.5±0.9pts) records. A majority of participants indicated that they could find the injury (281/342, 82.2%) and interventions (225/342, 65.8%) of interest. A majority of respondents (205/342, 60.0%) indicated they would consider using OSICS 10.1 Plus for injury surveillance in clinical practice. The OSICS 10.1 Plus could serve as an effective and useful mechanism for injury surveillance with minor modifications; however, we, as professionals in sports healthcare, need to improve regular medical documentation first so that we are better able to conduct injury surveillance among our patients.

Vehicle Exposure and Spinal Musculature Fatigue in Military Warfighters: A Meta-Analysis

CONTEXT

 Spinal musculature fatigue from vehicle exposure may place warfighters at risk for spinal injuries and pain. Research on the relationship between vehicle exposure and spinal musculature fatigue is conflicting. A better understanding of the effect of military duty on musculoskeletal function is needed before sports medicine teams can develop injury-prevention programs.

OBJECTIVE

 To determine if the literature supports a definite effect of vehicle exposure on spinal musculature fatigue.

DATA SOURCES

 We searched the MEDLINE, Military & Government Collection (EBSCO), National Institute for Occupational Safety and Health Technical Information Center, PubMed, and Web of Science databases for articles published between January 1990 and September 2015.

STUDY SELECTION

 To be included, a study required a clear sampling method, preexposure and postexposure assessments of fatigue, a defined objective measurement of fatigue, a defined exposure time, and a study goal of exposing participants to forces related to vehicle exposure.

DATA EXTRACTION

 Sample size, mean preexposure and postexposure measures of fatigue, vehicle type, and exposure time.

DATA SYNTHESIS

 Six studies met the inclusion criteria. We used the Scottish Intercollegiate Guidelines Network algorithm to determine the appropriate tool for quality appraisal of each article. Unweighted random-effects model meta-analyses were conducted, and a natural log response ratio was used as the effect metric. The overall meta-analysis demonstrated that vehicle exposure increased fatigue of the spinal musculature (P = .03; natural log response ratio = -0.22, 95% confidence interval = -0.42, -0.02). Using the spinal region as a moderator, we observed that vehicle ride exposure significantly increased fatigue at the lumbar musculature (P = .02; natural log response ratio = -0.27, 95% confidence interval = -0.50, -0.04) but not at the cervical or thoracic region.

CONCLUSIONS

 Vehicle exposure increased fatigue at the lumbar region.

The Effect of Military Load Carriage on Postural Sway, Forward Trunk Lean, and Pelvic Girdle Motion

Musculoskeletal injuries are a common occurrence in military service members. It is believed that the load carried by the service member impedes stability and alters back and pelvis kinematics, increasing their susceptibility to musculoskeletal injuries, specifically in the lower extremities. The purpose of this study was to examine the effects of two different loads on postural sway, forward trunk lean, and pelvic girdle motion in United States Army Cadets. Twenty male Army Reserve Officers' Training Corps Cadets participated in this study. Each participant performed the Modified Clinical Testing of Sensory Interaction (mCTSIB) Protocol and the Unilateral Stance (ULS) Protocol under three different rucksack load conditions (unloaded, 16.0 kg, and 20.5 kg loads). Mean postural sway velocity was recorded along with 2-D kinematics of the trunk in the sagittal plane and the pelvis in the frontal and sagittal planes. External loads of 16.0 kg (p < 0.001) and 20.5 kg (p ≤ 0.003) significantly increased mean sway velocity by 16% to 52% depending on stance and visual condition, but did not produce significant changes in trunk and pelvic kinematics.

Core Stability Exercise Versus General Exercise for Chronic Low Back Pain

Reference: Wang XQ, Zheng JJ, Yu ZW, et al. A meta-analysis of core stability exercise versus general exercise for chronic low back pain. PLoS One. 2012;7(12):e52082. Clinical Questions: Is core stability exercise more effective than general exercise in the treatment of patients with nonspecific low back pain (LBP)?

DATA SOURCES

 The authors searched the following databases: China Biological Medicine disc, Cochrane Library, Embase, and PubMed from 1970 through 2011. The key medical subject headings searched were chronic pain, exercise, LBP, lumbosacral region, and sciatica.

STUDY SELECTION

 Randomized controlled trials comparing core stability exercise with general exercise in the treatment of chronic LBP were investigated. Participants were male and female adults with LBP for at least 3 months that was not caused by a specific known condition. A control group receiving general exercise and an experimental group receiving core stability exercise were required for inclusion in the meta-analysis. Core stability was defined as the ability to ensure a stable neutral spine position, but the type of exercise was not specified. Outcome measures of pain intensity, back-specific functional status, quality of life, and work absenteeism were recorded at 3-, 6-, and 12-month intervals.

DATA EXTRACTION

 The study design, participant information, description of interventions in the control and experimental groups, outcome measures, and follow-up period were extracted. The mean difference (MD) and 95% confidence interval (CI) were calculated to evaluate statistical significance. Risk of bias was assessed using the Cochrane Collaboration Recommendations, and all articles were rated as high risk for other bias with no further explanation given.

MAIN RESULTS

 Five studies involving 414 patients were included. Four studies assessed pain intensity using the visual analog scale or numeric rating scale. In the core stability exercise group, the reduction in pain was significant at 3 months (MD = -1.29, 95% CI = -2.47, -0.11; P = .003) but not at 6 months (MD = -0.50, 95% CI = -1.36, 0.35; P = .26). Functional status was improved at 3 months (MD = -7.14, 95% CI = -11.64, -2.65; P = .002) but not at 6 months (MD = -0.50, 95% CI = 0.36, 0.35; P = .26) or 12 months (MD = -0.32, 95% CI = -0.87, 0.23; P = .25). All of the included studies assessed back-specific functional status: 4 used the Oswestry Disability Index and 1 used the Roland-Morris Disability Questionnaire. Patients in the core stability exercise groups experienced improved functional status versus the general exercise group at 3 months (MD = -7.14, 95% CI = -11.64, -2.65; P = .002); no results were recorded at 6 or 12 months.

CONCLUSIONS

 In the short term, core stability exercise was more effective than general exercise for decreasing pain and increasing back-specific functional status in patients with LBP.

Risk Factors for Medial Tibial Stress Syndrome in Active Individuals: An Evidence-Based Review

Reference/Citation: Hamstra-Wright KL, Bliven KC, Bay C. Risk factors for medial tibial stress syndrome in physically active individuals such as runners and military personnel: a systematic review and meta-analysis. Br J Sports Med. 2015;49(6):362-369.

CLINICAL QUESTION

What factors put physically active individuals at risk to develop medial tibial stress syndrome (MTSS)?

DATA SOURCES

The authors performed a literature search of CINAHL, the Cochrane Central Register of Controlled Trials, EMBASE, and MEDLINE from each database's inception to July 2013. The following key words were used together or in combination: armed forces, athlete, conditioning, disorder predictor, exercise, medial tibial stress syndrome, militaries, MTSS, military, military personnel, physically active, predictor, recruit, risk, risk characteristic, risk factor, run, shin pain, shin splints, and vulnerability factor.

STUDY SELECTION

Studies were included in this systematic review based on the following criteria: original research that (1) investigated risk factors associated with MTSS, (2) compared physically active individuals with and without MTSS, (3) was printed in English, and (4) was accessible in full text in peer-reviewed journals.

DATA EXTRACTION

Two authors independently screened titles or abstracts (or both) of studies to identify inclusion criteria and quality. If the article met the inclusion criteria, the authors extracted demographic information, study design and duration, participant selection, MTSS diagnosis, investigated risk factors, mean difference, clinical importance, effect size, odds ratio, and any other data deemed relevant. After the data extraction was complete, the authors compared findings for accuracy and completeness. When the mean and standard deviation of a particular risk factor were reported 3 or more times, that risk factor was included in the meta-analysis. In addition, the methodologic quality was assessed with an adapted checklist developed by previous researchers. The checklist contained 5 categories: study objective, study population, outcome measurements, assessment of the outcome, and analysis and data presentation. Any disagreement between the authors was discussed and resolved by consensus.

MAIN RESULTS

A total of 165 papers were initially identified, and 21 original research studies were included in this systematic review. More than 100 risk factors were identified in the 21 studies. Continuous data were reported 3 or more times for risk factors of body mass index (BMI), navicular drop, ankle plantar-flexion range of motion (ROM), ankle-dorsiflexion ROM, ankle-eversion ROM, ankle-inversion ROM, quadriceps angle, hip internal-rotation ROM, and hip external-rotation ROM. As compared with the control group, significant risk factors for developing MTSS identified in the literature were (1) greater BMI (mean difference [MD] = 0.79, 95% confidence interval [CI] = 0.38, 1.20; P < .001), (2) greater navicular drop (MD = 1.9 mm, 95% CI = 0.54, 1.84 mm; P < .001), (3) greater ankle plantar-flexion ROM (MD = 5.94°, 95% CI = 3.65°, 8.24°; P < .001), and (4) greater hip external-rotation ROM (MD = 3.95°, 95% CI = 1.78°, 6.13°; P < .001). Ankle-dorsiflexion ROM (MD = -0.01°, 95% CI = -0.96, 0.93; P = .98), ankle-eversion ROM (MD = 1.17°, 95% CI = -0.02, 2.36; P = .06), ankle-inversion ROM (MD = 0.98°, 95% CI = -3.11°, 5.07°; P = .64), quadriceps angle (MD = -0.22°, 95% CI = -0.95°, 0.50°; P = .54), and hip internal-rotation ROM (MD = 0.18°, 95% CI = -5.37°, 5.73°; P = .95), were not different between individuals with MTSS and controls.

CONCLUSIONS

The primary factors that appeared to put a physically active individual at risk for MTSS were increased BMI, increased navicular drop, greater ankle plantar-flexion ROM, and greater hip external-rotation ROM. These primary risk factors can guide health care professionals in the prevention and treatment of MTSS.

A Meta-Analysis to Determine if Lower Extremity Muscle Strengthening Should Be Included in Military Knee Overuse Injury-Prevention Programs

CONTEXT

 Knee overuse injuries are the most common musculoskeletal complaints in military trainees and are common in active-duty warfighters. Muscle strengthening is usually recommended; however, research is conflicting in this area, which makes it difficult to develop effective screening, prevention, and training interventions for warfighters.

OBJECTIVE

 To determine if lower extremity muscular weakness contributes to knee overuse injuries and identify specific muscular involvement.

DATA SOURCES

 We searched MEDLINE, PubMed, Web of Science, SPORTDiscus, CINAHL, and Military & Government Collection and reference lists of relevant articles published between January 1, 2000, and January 1, 2013.

STUDY SELECTION

 For inclusion, requirements were uninjured and injured groups; provision of the sample size, means, and standard deviations for all groups; identification of the specific muscles assessed; and clearly defined knee injury.

DATA EXTRACTION

 Sample size, sex, and muscle strength means and standard deviations.

DATA SYNTHESIS

 Twenty-five studies met these criteria. We used the Scottish Intercollegiate Guidelines Network algorithm to determine the appropriate tool for appraising article quality. Unweighted random-effects model meta-analyses were conducted. Separate meta-analyses were performed for the moderators of strength measurement scale (absolute or normalized muscle strength), muscle group, and sex. A weighted random-effects model with a Hedges g effect metric and 95% confidence intervals were used for comparison across studies.

CONCLUSIONS

 Our meta-analysis suggests that individuals with symptoms of a knee overuse injury have lower absolute and normalized hip muscle strength. Specifically, they had lower absolute hip external-rotator, knee-extensor, and knee-flexor strength, as well as lower normalized hip external-rotator, hip-extensor, and hip-abductor strength, compared with asymptomatic control participants. The findings suggest a possible link between lower hip and thigh strength and knee overuse injuries. Further research is needed to determine if weakness is a cause or a result of knee overuse injuries before screening and intervention can be developed for at-risk warfighters.

Local Pressure Application Effects on Discomfort, Temperature, and Limb Oxygenation

INTRODUCTION

Despite significant investment into the development and improvement of military helicopter seat systems, military aviators continue to report seat system related pain and discomfort during prolonged missions.

METHODS

Using a factorial repeated measures design, 15 healthy subjects completed the study, in which focal pressure was applied to two locations on the sitting surfaces of the body (ischial tuberosity and middle of the posterior thigh). Pressure was applied using a purpose-built pressure application system allowing subjects to sit in a position mimicking the sitting position in the UH-60 Black Hawk helicopter. The researchers measured pain using the Category Partitioning Scale and McGill Pain Questionnaire and vascular function using dynamic infrared thermography in the lower leg and pulse oximetry at the great toe. Data were collected before and during a 10-min application of focal pressure applied to either the ischial tuberosity or middle of the posterior thigh and at two different pressure magnitudes (36 or 44 kPa).

RESULTS

We found that during a 10-min pressure application, superficial skin temperature increased by 0.61°C, suggesting a decreased venous return during pressure application. We found that lower extremity blood oxygenation remained unchanged during pressure application. Subjects' reported pain increased during pressure application and was greater with 44 kPa of application compared to 36 kPa.

DISCUSSION

These results support the hypothesis that locally high pressure creates symptoms of discomfort and paresthesia. Research examining the effects of local pressure application on physiological and neurological function is needed. Games KE, Lakin JM, Quindry JC, Weimar WH, Sefton JM. Local pressure application effects on discomfort, temperature, and limb oxygenation. Aerosp Med Hum Perform. 2016; 87(8):697-703.

Optimizing Cold-Water Immersion for Exercise-Induced Hyperthermia: An Evidence-Based Paper

Reference: Zhang Y, Davis JK, Casa DJ, Bishop PA. Optimizing cold water immersion for exercise-induced hyperthermia: a meta-analysis. Med Sci Sports Exerc. 2015;47(11):2464-2472. Clinical Questions: Do optimal procedures exist for implementing cold-water immersion (CWI) that yields high cooling rates for hyperthermic individuals?

DATA SOURCES

One reviewer performed a literature search using PubMed and Web of Science. Search phrases were cold water immersion, forearm immersion, ice bath, ice water immersion, immersion, AND cooling.

STUDY SELECTION

Studies were included based on the following criteria: (1) English language, (2) full-length articles published in peer-reviewed journals, (3) healthy adults subjected to exercise-induced hyperthermia, and (4) reporting of core temperature as 1 outcome measure. A total of 19 studies were analyzed.

DATA EXTRACTION

Pre-immersion core temperature, immersion water temperature, ambient temperature, immersion duration, and immersion level were coded a priori for extraction. Data originally reported in graphical form were digitally converted to numeric values. Mean differences comparing the cooling rates of CWI with passive recovery, standard deviation of change from baseline core temperature, and within-subjects r were extracted. Two independent reviewers used the Physiotherapy Evidence Database (PEDro) scale to assess the risk of bias.

MAIN RESULTS

Cold-water immersion increased the cooling rate by 0.03°C/min (95% confidence interval [CI] = 0.03, 0.04°C/min) compared with passive recovery. Cooling rates were more effective when the pre-immersion core temperature was ≥38.6°C (P = .023), immersion water temperature was ≤10°C (P = .036), ambient temperature was ≥20°C (P = .013), or immersion duration was ≤10 minutes (P < .001). Cooling rates for torso and limb immersion (mean difference = 0.04°C/min, 95% CI = 0.03, 0.06°C/min) were higher (P = .028) than those for forearm and hand immersion (mean difference = 0.01°C/min, 95% CI = -0.01, 0.04°C/min).

CONCLUSIONS

Hyperthermic individuals were cooled twice as fast by CWI as by passive recovery. Therefore, the former method is the preferred choice when treating patients with exertional heat stroke. Water temperature should be <10°C, with the torso and limbs immersed. Insufficient published evidence supports CWI of the forearms and hands.

Using Tuning-Fork Tests in Diagnosing Fractures

REFERENCE/CITATION

Mugunthan K, Doust J, Kurz B, Glasziou P. Is there sufficient evidence for tuning fork tests in diagnosing fractures? A systematic review. BMJ Open. 2014;4(8):e005238.

CLINICAL QUESTION

Does evidence support the use of tuning-fork tests in the diagnosis of fractures in clinical practice?

DATA SOURCES

The authors performed a comprehensive literature search of AMED, CAB Abstracts, CINAHL, EMBASE, MEDLINE, SPORTDiscus, and Web of Science from each database's start to November 2012. In addition, they manually searched reference lists from the initial search result to identify relevant studies. The following key words were used independently or in combination: auscultation, barford test, exp fractures, fracture, tf test, tuning fork.

STUDY SELECTION

Studies were eligible based on the following criteria: (1) primary studies that assessed the diagnostic accuracy of tuning forks; (2) measured against a recognized reference standard such as magnetic resonance imaging, radiography, or bone scan; and (3) the outcome was reported using pain or reduction of sound. Studies included patients of all ages in all clinical settings with no exclusion for language of publication. Studies were not eligible if they were case series, case-control studies, or narrative review papers.

DATA EXTRACTION

Potentially eligible studies were independently assessed by 2 researchers. All relevant articles were included and assessed for inclusion criteria and value using the Quality Assessment of Diagnostic Accuracy Studies (QUADAS-2) tool, and relevant data were extracted. The QUADAS-2 is an updated version of the original QUADAS and focuses on both the risk of bias and applicability of a study through a series of questions. A third researcher was consulted if the 2 initial reviewers did not reach consensus. Data for the primary outcome measure (accuracy of the test) were presented in a 2 × 2 contingency table to show sensitivity and specificity (using the Wilson score method) and positive and negative likelihood ratios with 95% confidence intervals.

MAIN RESULTS

A total of 62 citations were initially identified. Six primary studies (329 patients) were included in the review. The 6 studies assessed the accuracy of 2 tuning-fork test methods (pain induction and reduction of sound transmission). The patients ranged in age from 7 to 84 years. The prevalence of fracture in these patients ranged from 10% to 80% using a reference standard such as magnetic resonance imaging, radiography, or bone scan. The sensitivity of the tuning-fork tests was high, ranging from 75% to 92%. The specificity of the tuning-fork tests had a wide range of 18% to 94%. The positive likelihood ratios ranged from 1.1 to 16.5; the negative likelihood ratios ranged from 0.09 to 0.49.

CONCLUSIONS

The studies included in this review demonstrated that tuning-fork tests have some value in ruling out fractures. However, strong evidence is lacking to support the use of current tuning-fork tests to rule in a fracture in clinical practice. Similarly, the tuning-fork tests were not statistically accurate in the diagnosis of fractures for widespread clinical use. Despite the lack of strong evidence for diagnosing all fractures, tuning-fork tests may be appropriate in rural and remote settings in which access to the gold standards for diagnosis of fractures is limited.

Whole-body vibration and blood flow and muscle oxygenation: a meta-analysis

CONTEXT

The use and popularity of whole-body vibration (WBV) has increased in recent years, but there is a lack of consensus in the literature about the effectiveness of the treatment.

OBJECTIVE

To quantitatively examine the effects of WBV on muscle oxygenation and peripheral blood flow in healthy adults.

DATA SOURCES

We searched Web of Science and PubMed databases and reference lists from relevant articles using the key terms whole body vibration, whole-body vibration, WBV, blood flow, peripheral blood flow, oxygenation, muscle oxygenation, circulation, circulatory, near infrared spectroscopy, NIRS, and power Doppler. Key terms were searched using single word and combination searches. No date range was specified.

STUDY SELECTION

Criteria for inclusion were (1) use of a commercially available WBV device, (2) a human research model, (3) a pre-WBV condition and at least 1 WBV experimental condition, and (4) reporting of unstandardized means and standard deviations of muscle oxygenation or peripheral blood flow.

DATA EXTRACTION

Means, standard deviations, and sample sizes were extracted from the text, tables, and figures of included studies. A total of 35 and 90 data points were extracted for the muscle-oxygenation and blood-flow meta-analyses, respectively. Data for each meta-analysis were combined and analyzed using meta-analysis software. Weighted, random-effects meta-analyses using the Hedges g metric were completed for muscle oxygenation and blood flow. We then conducted follow-up analyses using the moderator variables of vibration type, vibration time, vibration frequency, measurement location, and sample type.

DATA SYNTHESIS

We found 18 potential articles. Further examination yielded 10 studies meeting the inclusion criteria. Whole-body vibration was shown to positively influence peripheral blood flow. Additionally, the moderators of vibration type and frequency altered the influence of WBV on blood flow. Overall, WBV did not alter muscle oxygenation; however, when the measurement site was considered, muscle oxygenation increased or decreased depending on the location.

CONCLUSIONS

Acute bouts of WBV increase peripheral blood flow but do not alter skeletal muscle oxygenation. Vibration type appears to be the most important factor influencing both muscle oxygenation and peripheral blood flow.

Tissue Changes During Operational Load Bearing in UH-60 Aircrew Using Magnetic Resonance Imaging

INTRODUCTION

Warfighters involved in mounted operations often experience prolonged periods of tissue loading, leading to injury. Determining how anatomical structures are affected during loading aids in the prevention and treatment of injury. The purpose of this study was to develop a magnetic resonance imaging (MRI) compatible seat system that simulates a UH-60 Blackhawk in-flight sitting posture.

METHODS

Eight men were scanned with a 3.0 Tesla MRI. Scans were collected with and without 6.38 psi of pressure applied to the buttocks via two air bladders and an MRI-compatible robot controller system.

RESULTS

Scans revealed that 6.38 psi of pressure applied to the buttocks significantly decreases total soft-tissue thickness beneath the left and right ischial tuberosities by 3.6 and 3.8 mm, respectively.

DISCUSSION

At operational load bearing pressures seen in the UH-60, the soft tissue structures of the buttocks are compressed. These findings aid in our understanding of the etiology of repetitive trauma disorders in aircrew due to prolonged sitting. This study serves as the foundation for future work examining the anatomical changes associated with prolonged restricted sitting and other operational activities. A better understanding of the anatomical characteristics associated with mounted operations is invaluable to the prevention and treatment of injuries reported by warfighters and civilian populations.

Diagnosis, treatment, and rehabilitation of stress fractures in the lower extremity in runners

Stress fractures account for between 1% and 20% of athletic injuries, with 80% of stress fractures in the lower extremity. Stress fractures of the lower extremity are common injuries among individuals who participate in endurance, high load-bearing activities such as running, military and aerobic exercise and therefore require practitioner expertise in diagnosis and management. Accurate diagnosis for stress fractures is dependent on the anatomical area. Anatomical regions such as the pelvis, sacrum, and metatarsals offer challenges due to difficulty differentiating pathologies with common symptoms. Special tests and treatment regimes, however, are similar among most stress fractures with resolution between 4 weeks to a year. The most difficult aspect of stress fracture treatment entails mitigating internal and external risk factors. Practitioners should address ongoing risk factors to minimize recurrence.

Prolonged restricted sitting effects in UH-60 helicopters

INTRODUCTION

Advances in flight technologies and the demand for long-range flight have increased mission lengths for U.S. Army Black Hawk UH-60 crewmembers. Prolonged mission times have increased reports of pilot discomfort and symptoms of paresthesia thought to be due to UH-60 seat design and areas of locally high pressure. Discomfort created by the seat-system decreases situational awareness, putting aviators and support crew at risk of injury. Therefore, the purpose of this study was to examine the effects of prolonged restricted sitting in a UH-60 on discomfort, sensory function, and vascular measures in the lower extremities.

METHODS

There were 15 healthy men (age = 23.4 ± 3.1 yr) meeting physical flight status requirements who sat in an unpadded, UH-60 pilot's seat for 4 h while completing a common cognitive task. During the session, subjective discomfort, sensory function, and vascular function were measured.

RESULTS

Across 4 h of restricted sitting, subjective discomfort increased using the Category Partitioning Scale (30.27 point increase) and McGill Pain Questionnaire (8.53 point increase); lower extremity sensory function was diminished along the S1 dermatome; and skin temperature decreased on both the lateral (2.85°C decrease) and anterior (2.78°C decrease) aspects of the ankle.

DISCUSSION

The results suggest that prolonged sitting in a UH-60 seat increases discomfort, potentially through a peripheral nervous or vascular system mechanism. Further research is needed to understand the etiology and onset of pain and paresthesia during prolonged sitting in UH-60 pilot seats. Games KE, Lakin JM, Quindry JC, Weimar WH, Sefton JM. Prolonged restricted sitting effects in UH-60 helicopters.

Whole-body vibration influences lower extremity circulatory and neurological function

Whole-body vibration (WBV) is currently used to enhance performance and treat injuries even though we lack an understanding of how WBV influences physiological processes. An improved understanding of the physiological effects of WBV could lead to protocols to speed healing or treat pathologies. This study examined the acute effects of WBV on peripheral blood perfusion, muscle oxygenation, motoneuron pool excitability, and sensory nerve conduction velocity. Fourteen healthy participants [9 women (21.7 ± 2.4 years); 5 men (20.8 ± 1.1 years)] completed a 5 min bout of WBV (50 Hz, 2 mm amplitude). Measures were assessed pre-treatment and at 0, 5, 10, 15, and 20 min post-treatment. WBV significantly increased superficial skin temperature (P < 0.0005) and total hemoglobin (P = 0.009), had no effect of oxyhemoglobin (P = 0.186), increased deoxyhemoglobin (P < 0.0005), inhibited the soleus Hoffmann reflex (P = 0.007), and had no effect on sural sensory nerve conduction velocity (P = 0.695). These results suggest that an acute bout of WBV influences physiological processes in both the circulatory and the nervous systems.