bluuebunny/crossref_metadata_2025_split huggingface dataset:
Negative Effects on Postural Control After Anterior Cruciate Ligament Reconstruction as Measured by the Balance Error Scoring System
Authors: Smith Mason D. , Bell David R. 
Published: August 2016

Context:Anterior cruciate ligament (ACL) reconstruction is the standard of care for individuals with ACL rupture. Balance deficits have been observed in patients with ACL reconstruction (ACLR) using advanced posturography, which is the current gold standard. It is unclear if postural-control deficits exist when assessed by the Balance Error Scoring System (BESS), which is a clinical assessment of balance.Objective:The purpose of this study is to determine if postural-control deficits are present in individuals with ACLR as measured by the BESS.Participants:Thirty participants were included in this study. Fifteen had a history of unilateral ACLR and were compared with 15 matched controls.Interventions:The BESS consists of 3 stances (double-limb, single-limb, and tandem) on 2 surfaces (firm and foam). Participants begin in each stance with hands on their hips and eyes closed while trying to stand as still as possible for 20 s.Main Outcome Measures:Each participant performed 3 trials of each stance (18 total), and errors were assessed during each trial and summed to create a total score.Results:We observed a significant group × stance interaction (P = .004) and a significant main effect for stance (P < .001). Post hoc analysis revealed that the ACLR group had worse balance on the single-leg foam stance than did controls. Finally, the reconstructed group had more errors when total BESS score was examined (P = .02).Conclusions:Balance deficits exist in individuals with ACLR as measured by the BESS. Total BESS score was different between groups. The only condition that differed between groups was the single-leg stance on the unstable foam surface.
Relationship Between Gluteal Muscle Strength, Corticospinal Excitability, and Jump-Landing Biomechanics in Healthy Women
Authors: Lepley Adam S. , Strouse Allison M. , Ericksen Hayley M. , Pfile Kate R. , Gribble Phillip A. , Pietrosimone Brian G. 
Published: August 2016

Context:Components of gluteal neuromuscular function, such as strength and corticospinal excitability, could potentially influence alterations in lower extremity biomechanics during jump landing.Objective:To determine the relationship between gluteal muscle strength, gluteal corticospinal excitability, and jump-landing biomechanics in healthy women.Setting:University laboratory.Design:Descriptive laboratory study.Participants:37 healthy women (21.08 ± 2.15 y, 164.8 ± 5.9 cm, 65.4 ± 12.0 kg).Interventions:Bilateral gluteal strength was assessed through maximal voluntary isometric contractions (MVIC) using an isokinetic dynamometer. Strength was tested in the open chain in prone and side-lying positions for the gluteus maximus and gluteus medius muscles, respectively. Transcranial magnetic stimulation was used to elicit measures of corticospinal excitability. Participants then performed 3 trials of jump landing from a 30-cm box to a distance of 50% of their height, with an immediate rebound to a maximal vertical jump. Each jump-landing trial was video recorded (2-D) and later scored for errors.Main Outcome Measures:MVICs normalized to body mass were used to assess strength in the gluteal muscles of the dominant and nondominant limbs. Corticospinal excitability was assessed by means of active motor threshold (AMT) and motor-evoked potentials (MEP) elicited at 120% of AMT. The Landing Error Scoring System (LESS) was used to evaluate jump-landing biomechanics.Results:A moderate, positive correlation was found between dominant gluteus maximus MEP and LESS scores (r = .562, P = .029). No other significant correlations were observed for MVIC, AMT, or MEP for the gluteus maximus and gluteus medius, regardless of limb.Conclusions:The findings suggest a moderate relationship between dominant gluteus maximus corticospinal excitability and a clinical measure of jump-landing biomechanics. Further research is required to substantiate the findings and expand our understanding of the central nervous system’s role in athletic movement.
Effects of Transducer Mass on Intramuscular Temperature During Ultrasound Treatments
Authors: Krasinski Daniel , Thrasher Ashley B. , Miller Michael G. , Holcomb William R. 
Published: August 2016

Context:A potential variable that could affect rate of temperature elevation with ultrasound is the pressure (mass) that is applied to the transducer head during application. Added pressure could compress the tissue, affecting density and the transmission of ultrasound energy. Little research has been completed to determine the effects of the amount of pressure applied during therapeutic ultrasound in vivo.Objective:To determine the effects of different applied transducer mass on intramuscular temperature during an ultrasound treatment within the left triceps surae.Design:Crossover clinical trial.Setting:Human performance research laboratory.Participants:Convenience sample of thirteen healthy, college-age students.Interventions:Three separate MHz, 1.0-W/cm2 ultrasound treatments were administered 1.5 cm within the triceps surae. The independent variables were the linear temperature standards (0.5°C, 1.0°C, 1.5°C, and 2.0°C above baseline) and the 3 different applied pressures measured in grams (200 g, 600 g, and 800 g).Main Outcome Measures:A thermocouple probe was used to measure triceps surae temperature, and time to reach the temperature standards was recorded during the ultrasound treatments. A 4 × 3 repeated-measures analysis of variance (RM-ANOVA) was used to analyze the differences for temperature points (0.5°C, 1.0°C, 1.5°C, and 2.0°C) and transducer mass (200 g, 600 g, and 800 g) and with respect to time.Results:The results of the RM-ANOVA showed no temperature-point and transducer-mass interaction (F6,72 = 1.69, P = .137) or main effect for mass (F2,24 = 1.23, P = .309). The time required to raise temperature 2°C was 209.1 ± 68.10 s at 200 g, 181.5 ± 61.50 s at 600 g, and 194.9 ± 75.54 s at 800 g.Conclusions:Under the conditions of this study, the amount of mass applied with the transducer during an ultrasound treatment does not ultimately affect the rate of tissue heating.
The Effectiveness of Shoulder Stretching and Joint Mobilizations on Posterior Shoulder Tightness
Authors: Harshbarger Nicole D. , Eppelheimer Bradly L. , McLeod Tamara C. Valovich , McCarty Cailee Welch 
Published: August 2016

Clinical Scenario:It has been suggested that posterior shoulder tightness is a common contributor to shoulder impingement in overhead-throwing athletes. The incidence of shoulder pain in the general population has been reported to be as high as 27%, and as many as 74% of the patients who were seen for shoulder issues had signs of impingement. Particularly regarding physically active adults, shoulder impingement is frequent among overhead-throwing athletes and may lead to lost participation in sport, as well as other injuries including labral pathologies. Therefore, finding an effective mechanism to reduce posterior shoulder tightness in overhead athletes is important and may help prevent impingement-type injuries. Typically, posterior shoulder tightness is identified by measuring horizontal humeral adduction; although another clinical measure that is commonly used is the bilateral measurement of glenohumeral internal-rotation (IR) range of motion (ROM). It is important to note, however, that the measurement of glenohumeral IR ROM specifically aims to identify glenohumeral IR ROM deficits (GIRD). Although GIRD is believed to be a leading contributor to posterior shoulder tightness, this measure alone may not capture the full spectrum of posterior shoulder tightness. While treatment interventions to correct any ROM deficits typically include a stretching protocol to help increase IR, joint mobilizations have been found to produce greater mobility of soft tissue and capsular joints. However, it is unclear whether the combination of both joint mobilizations and a stretching protocol will produce even larger gains of ROM that will have greater longevity for the patient suffering from posterior shoulder tightness.Focused Clinical Question:Does the use of joint mobilizations combined with a stretching protocol more effectively increase glenohumeral IR ROM in adult physically active individuals who participate in overhead sports and are suffering from posterior shoulder tightness, compared with a stretching protocol alone?
What Determines the Magnitude of the Q Angle? A Preliminary Study of Selected Skeletal and Muscular Measures
Authors: Byl Timo , Cole Jennifer A. , Livingston Lori A. 
Published: August 2016

Context:Q-angle size has been found to correlate poorly with skeletal measures of pelvic breadth and femur length. Because the patella is exposed to the forces of quadriceps contraction, muscular forces might also affect Q-angle magnitude.Objective:To compare bilateral measurements of the Q angle with selected skeletal and muscular strength measures.Design:In vivo study of anthropometric and quadriceps peak torque measures.Setting:Research laboratory.Participants:Thirty-four healthy men and women, mean age 20.9 ± 2.7 years.Main Outcome Measures:Q angles, pelvic breadths, femur lengths, and peak torque during dynamic knee-extension exercise, normalized to body weight.Results:Significant differences in Q-angle magnitude, femur length, and peak torqueBW were observed between sexes, but not between limbs. Pelvic breadth did not differ significantly between sexes. Correlational analysis revealed a weak, yet significant, linear relationship between Q angle and peak torqueBW in the right lower limb.Conclusions:These findings lend some support to the notion that Q-angle magnitude is inversely related to quadriceps strength.
Rehabilitation after Hip Arthroscopy
Authors: Griffin Karen M. , Henry Cindy O. , Byrd J. W. Thomas 
Published: August 2016

Objective:To explain the basic fundamentals of patient assessment after hip arthroscopy, formulation of a treatment plan, and detailed essentials of postoperative rehabilitation.Data Sources:Established literature and the evolution of a protocol developed in treating over 150 hip-arthroscopy patients and numerous patients with symptomatic hip disease.Data Synthesis:Although the pathological process being addressed and the surgical technique employed in its management influence the protocol, the common goals of rehabilitation are to reduce discomfort and improve function. These common goals, first realized in the postoperative rehabilitation process, have been found to have similar application in the conservative management of patients with symptomatic hip disease.Conclusions:Arthroscopy has necessitated the development of a postoperative rehabilitation protocol. Principles previously employed in other joints are now finding application in the hip.
A Comparison of Recreational Sports and Leisure Time Participation of College/University Students in China, Japan, Korea, Iran, the United States, and Canada—with Students in the Republic of China (Taiwan)
Authors: Cheng Philip Shao-Tung , Stier William F. , Kim Chong , Xu Ben-Li , Tokyo Eiji Koshimizu 
Published: August 2016

University students play a major role in improving the quality of society and the productivity of a nation in terms of their physical fitness level and recreational activity (Cheng, 1998). This article examines the status, the generally recognized importance and perceived benefits of recreational and sport participation (leisure time activities) for college students. Additionally, a comparison, by means of a survey instrument, is made between university students' recreational sport participation in six different countries—China, Japan, Korea, Iran, the United States, and Canada—with the recreational sport participation of university students within the Republic of China (Taiwan). The survey reveals the type of recreational participation of collegiate students in these countries, as well as factors that affected the students' choice of recreational and leisure time pursuits at their colleges and universities, with implications for future planning of recreational and sport activities for students at colleges and universities.
A Reassessment of the Psychosocial Functions of Sport Scale
Authors: Martin Douglas E. , Dodder Richard A. 
Published: August 2016

© 1993 Human Kinetics Publishers, Inc.In the early 1970s Spreitzer and Snyder developed the Psychosocial Functions of Sport Scale to assess people’s perceptions of the importance of sport, and they administered this instrument to a sample of Toledo, Ohio, residents. This study reassesses the reliability and construct validity of the scale and examines college students’ perceptions of the importance of sport. Factor analysis and Cronbach’s alpha indicate that Spreitzer and Snyder’s scale meets the criteria of reliability and construct validity. An item analysis indicates that most subjects believe sport to be important for individuals and society. Subjects’ responses to 12 of the 15 items are strikingly similar to the response distribution reported by Spreitzer and Snyder; however, there are notable differences on three of the items, suggesting that the present sample did not view sport as an institution that develops good citizens, promotes fair play, or alleviates drug problems in society.
Current Activity Patterns of Women Intercollegiate Athletes of the Late 1960’s and 1970’s
Authors: Strawbridge Marilyn 
Published: August 2016

The purpose of this study was to describe (1) the current physical activity (PA) levels of women who were among the earliest competitors in organized intercollegiate sports during the late 1960s and 1970s. Activity was determined using the Godin Leisure Time Questionnaire. Of the 103 subjects, 45% reported participation in strenuous activity (MET level 9), and 41% reported participation in moderate activity (MET level 5) more than 3 times per week. The majority of women often (50%) or sometimes (38%) participated in activity long enough to work up a sweat. Only 12 % reported never engaging in activity long enough to work up a sweat. Most women (66%) currently participate in physical activity to gain health or fitness or for recreation. A much smaller percentage (13%) still enjoys competition. Most women (60%) performed these activities alone while only 3% participated in group activities. Most (73%) indicated that the opportunity to participate in their college sport does not currently exist, while 27% indicated that they still participate. Reasons for not participating included no program available (27%), musculo-skeltal problems (15%), no desire (6%) and that their college sport was too vigorous (3%). The most common activities in which women currently participate are golf, running, jogging and walking and tennis. A large majority (97%) indicated previous intercollegiate participation had very positively influenced their current participation in physical activity.Unlike the majority of their peers, this population of women who competed in the early intercollegiate athletics has tended to stay active in spite of decreasing opportunities to engage in team and other physical activities after college and as they age.
Exercises in Empowerment: Toward a Feminist Aerobic Pedagogy
Authors: Haravon Leslie D. 
Published: August 2016

The current popularity of aerobic dance exercise makes it an important site for the analysis of women and movement. Feminist researchers have critiqued aerobics as an activity which does more to maintain dominant ideologies of women’s powerlessness than it does to liberate women through movement and action (Kagan & Morse, 1988; MacNeil, 1988; Theberge, 1985, 1987) whereas, based upon psychological studies, a participation in aerobics has been shown to improve self-esteem (Labbe, Welsh, & Delaney, 1988; Plummer & Young, 1987; Skrinar, Bullen, Cheek, McArthur, & Vaughan, 1986). Other scholars point to the contradictions of empowerment and oppression that women must encounter when they participate in aerobic dance exercise (Haravon, 1992; Kenen, 1987; Markula, 1991).In this paper I consider an alternative feminist reading of aerobic dance exercise, arguing that there are specific ways to make the mainstream aerobic workout a site for empowerment for women. Using the commentary of physical education students, I explain how an aerobic workout can empower its female participants. My definition of the term empowerment is borrowed from the work of Nancy Theberge (1985, 1987) in which she discusses women’s liberation and feminist notions of power as they might apply to sport. Theberge argues that “the potential of sport to act as an agent of women’s liberation stems mainly from the opportunity that women’s sporting activity affords them to experience their bodies as strong and powerful and free from male domination” (Theberge, 1985, p. 202). Theberge discusses both energy and creativity as more feminist ways of conceiving of power in sport (Theberge, 1987). I argue that creative and energetic power as well as the experience of a strong body free from male domination can be cultivated in the aerobic workout.In the research presented here, I discuss common theoretical critiques of the practice of aerobics, review interactive studies of aerobics, and describe the method and practice of teaching both aerobics and Hatha Yoga. Quoting students in a yoga class, I note certain aspects of the class that might make it an empowering, consciousness-changing experience for these students. The yoga teaching methods discussed here are used as a guideline for the discussion of the empowering aerobic workout, which prescribes methods for teaching empowering aerobics using the recommendations, critiques and comments from the preceding sections. The purpose of this paper, rather than being a comparison of two representative samples of research subjects in yoga and aerobics classes, is to suggest that a juxtaposition of methods of teaching might reveal practical knowledge about empowering students in an aerobics class. Before discussing teaching and empowerment in particular, I offer the following theoretical perspectives on aerobics which are grounded in Cultural Studies, the assumptions of which are discussed below.
Is It Worth the Price? Women’s Involvement in Leadership and Coaching in Sport Organizations in Norway
Authors: Hovden Jorid 
Published: August 2016

The Norwegian Confederation of Sports, the non-profit umbrella organization for all organized sports in Norway, has gradually accepted women’s demands for equal opportunities and full integration at all levels. The situation for women in sports politics and coaching today is characterized by male dominance as well as high drop-out rates and recruiting problems among women.The aim of the investigation, as basis for this article, was to give women’s experiences within elected posts and coaching a public voice and elaborate why women hesitate to involve themselves or drop-out after a short period of time. The following questions are outlined and discussed:- What motivates women to take up elected posts and coaching? - What experiences do women have after holding such posts and roles? - What problems and challenges seem to be difficult to face and handle?The analytical perspective was inspired by the feminist critique of organizations as gender-neutral arenas, and Bourdieu’s analysis of dominance and power within social fields. The empirical material consisted of questionnaire data and data from a search conference. The sample consisted of women holding elected posts, as well as, female coaches.Based upon the results women as a group within male domains were not empowered to raise and articulate interests and needs as women. The respondents reported an awareness of barriers, role conflicts and dilemmas, but lacked most often the ability to initiate collective emancipatory changes. The established male-dominated practices were seen as selfevident and natural. Many women chose the strategy of exit as the solution to their situation, because the cost of promoting change outweighed the benefits.
A Diguanylate Cyclase Acts as a Cell Division Inhibitor in a Two-Step Response to Reductive and Envelope Stresses
Authors: Kim Hyo Kyung , Harshey Rasika M. 
Published: August 2016

ABSTRACT

Cell division arrest is a universal checkpoint in response to environmental assaults that generate cellular stress. In bacteria, the cyclic di-GMP (c-di-GMP) signaling network is one of several signal transduction systems that regulate key processes in response to extra-/intracellular stimuli. Here, we find that the diguanylate cyclase YfiN acts as a bifunctional protein that produces c-di-GMP in response to reductive stress and then dynamically relocates to the division site to arrest cell division in response to envelope stress in
Escherichia coli
. YfiN localizes to the Z ring by interacting with early division proteins and stalls cell division by preventing the initiation of septal peptidoglycan synthesis. These studies reveal a new role for a diguanylate cyclase in responding to environmental change, as well as a novel mechanism for arresting cell division.

IMPORTANCE
While the major role of c-di-GMP signaling is to control the decision to move freely or settle in a biofilm, recent studies show a broader range of output functions for c-di-GMP signaling. This work reports an unexpected second role for YfiN, a conserved diguanylate cyclase in Gram-negative bacteria, known to contribute to persistence in the host. We find that YfiN acts as a cell division inhibitor in response to envelope stress. Unlike known cell division inhibitors, the interaction of YfiN with cell division proteins retains the Z ring at the midcell but prevents septal invagination. The new function of YfiN not only emphasizes the versatility of c-di-GMP signaling but describes a novel mechanism for a cell division checkpoint.