scholarly journals The Effects of Angular Velocity and Training Status on the Dynamic Control Equilibrium

2017 ◽  
Vol 01 (01) ◽  
pp. E23-E29 ◽  
Author(s):  
Tobias Alt ◽  
Axel Knicker ◽  
Heiko Strueder

AbstractThigh muscle imbalances may impair sports performance and cause injuries. Common diagnostic parameters of knee muscle balance lack practical applicability. This cross-sectional study aimed to evaluate the effects of angular velocity and training status on the dynamic control ratio at the equilibrium point representing the intersection of eccentric knee flexion and concentric knee extension moment-angle curves. 58 trained and 58 untrained male participants (22.1 years, 82.4 kg) performed concentric and eccentric knee flexions (prone position) and extensions (supine position) on an isokinetic dynamometer operating at 30 and 150°/s. Trained participants had significantly higher DCRe moments at all angular velocities compared with their untrained counterparts (trained30,150: 1.86, 1.90 Nm/kg; untrained30,150: 1.56, 1.60 Nm/kg; p<0.001, partial η²=0.345). Dynamic control equilibrium moments rose with increasing velocity (p=0.001, partial η²=0.095), whereas dynamic control equilibrium angles (trained30,150: 28.9, 30.8°; untrained30,150: 26.1, 27.0°) were influenced by training status (p=0.004, partial η²=0.072), but not by angular velocity (p=0.241, partial η²=0.012). Dynamic control equilibrium parameters detect thigh muscle balance and reflect the trained participants’ capacity to resist high eccentric knee flexor moments, especially during fast movements. Direct links to muscular loading during sprinting are conceivable, but warrant further investigation. The assessment of dynamic control equilibrium moments and angles might help physiotherapists and coaches to improve functional muscle screening, injury prevention and purposeful return to sport.

2021 ◽  
Author(s):  
Bobby Jean Lee ◽  
Damond Blueitt ◽  
Joseph Hannon ◽  
Shiho Goto ◽  
J. Craig Garrison

ABSTRACT Context: A relationship between a positive history of sport-related concussion (SRC) and lower extremity (LE) injury has been well established in the literature. Objective: The purpose of this study was to determine if biomechanical differences exist during a double limb jump landing (DLJ) between athletes who had been released for return to play after SRC and healthy matched controls (Healthy). Design: Cross-Sectional Study Setting: Health system-based Outpatient Sports Medicine Center Participants: 21 participants (16.33±12.7 days out from being released to return to sport after SRC) (age: 15.38±1.77; height: 169.23±8.59; mass: 63.43±7.39) were compared to 21 age, sex, activity-matched healthy controls (age: 15.36±1.73; height: 169.92±11.1; mass: 65.62±12.08). No significant differences existed between groups for descriptive data. Main Outcome Measure(s): Biomechanical performance during DLJ was assessed using Motion Capture System and force plates. The average of five consecutive trials was used to calculate lower extremity joint kinetic and kinematics. Variables of interest included internal knee extension moment, internal varus moment, and total sagittal plane knee displacement for both the dominant and non-dominant limbs. Independent t-tests were performed to examine the differences between SRC and Healthy groups for variables of interest. Results: The SRC group demonstrated greater internal knee extension moments on their dominant (KEDomDiff=–.028±.009; p=.003) and non-dominant (KENonDomDiff=–.018±.007, p=.019) limbs. The SRC group also demonstrated greater internal varus moments on their dominant (VDomDiff=.012±.004, p=.005) and non-dominant (VNonDomDiff=.010±.003, p=.005) limbs. For sagittal plane knee displacement, the SRC group demonstrated less knee flexion displacement on their dominant (DispDomDiff=–12.56±4.67, p=.011) but not their non-dominant limb (DispNonDomDiff=–8.30±4.91, p=.099). Conclusions: Athletes who have been released for return to sport after SRC land in greater knee valgus compared to healthy matched controls.


BJS Open ◽  
2021 ◽  
Vol 5 (Supplement_1) ◽  
Author(s):  
◽  
Joshua Clements

Abstract Background The COVID-19 pandemic has resulted in dynamic changes to healthcare delivery. Surgery as a specialty has been significantly affected and with that the delivery of surgical training. Method This national, collaborative, cross sectional study comprising 13 surgical trainee associations distributed a pan surgical specialty survey on the COVID-19 impact on surgical training over a 4-week period (11th May - 8th June 2020). The survey was voluntary and open to medical students and surgical trainees of all specialties and training grades. All aspects of training were qualitatively assessed. This study was reported according to STROBE guidelines. Results 810 completed responses were analysed. (M401: F 390) with representation from all deaneries and training grades. 41% of respondents (n = 301) were redeployed with 74% (n = 223) redeployed &gt; 4 weeks. Complete loss of training was reported in elective operating (69.5% n = 474), outpatient activity (67.3%, n = 457), Elective endoscopy (69.5% n = 246) with &gt; 50% reduction in training time reported in emergency operating (48%, n = 326) and completion of work-based assessments (WBA) (46%, n = 309). 81% (n = 551) reported course cancellations and departmental and regional teaching programmes were cancelled without rescheduling in 58% and 60% of cases respectively. A perceived lack of Elective operative exposure and completions of WBA’s were the primary reported factor affecting potential training progression. Overall, &gt; 50% of trainees (n = 377) felt they would not meet the competencies required for that training period. Conclusion This study has demonstrated a perceived negative impact on numerous aspects of surgical training affecting all training specialties and grades.


Author(s):  
Jayashree Sajjanar ◽  
Minal Soni ◽  
Jaykumar Gade ◽  
Megha Agrawal ◽  
Arunkumar Basavaraj Sajjanar

Introduction: Temporomandibular Disorders (TMDs) accounts for common Orofacial Pain (OFP) arising from musculoskeletal origins, affecting almost 80% of the overall population. The multifactorial nature of the disease makes it difficult to diagnose and treat and is challenging to a considerable number of General Dental Practitioners (GDPs). They’re increasingly approached by patients for advice on TMD, but little is understood about how this disorder is addressed with in primary health care. Aim: To assess the awareness and knowledge regarding management of TMDs among GDPs in Central India. Materials and Methods: The cross-sectional study was conducted at Central India, Nagpur, Maharashtra, India from 20th June 2020 to 12th December 2020, including 200 general dental practitioners, who were registered under the Dental Council of India. A questionnaire consisting of 17 questions with reference to TMDs was designed and the questionnaire was circulated through a web designed program. The responses were collected, and data were analysed descriptively using Statistical Package for the Social Sciences (SPSS) statistics for windows version 24.0. Results: The mean age of the participants in the study was 24.80±1.63 years. Predominantly, participants were 164 females (82%). Among all the participants, about 181 (90.50%) of GDP’s were practicing Dentistry. The study findings suggest that the overall general practicing dentists encounter TMD cases and 162 (81%) of GDP’s treat patient at their clinic. A 76% of GDPs acknowledged the causative factor for TMD to be multifactorial and physical examination (88.50%) as the diagnostic tool. Most of the general practitioners around 126 (63%) preferred referring the patient to the specialist, maxillofacial surgeon. Among the practitioners who were confident in treating TMD, occlusal splint was the treatment of choice for 198 (96%) of the GDPs. Conclusion: Many GDPs lack standard protocol knowledge, felt insecure in TMD diagnosis, therapy decisions and treatment. There is a requirement for better quality evidence on which TMD diagnosis and treatment, including the event of a valid, reproducible patient-centered outcome measure to enable dental practitioners to feel confident in managing TMD. It is essential to train GDPs to identify individuals with TMDs through professional courses and training. It would be highly beneficial to educate the undergraduates regarding the diagnosis of TMDs in their curriculum.


2012 ◽  
Vol 20 (01) ◽  
pp. 164-170
Author(s):  
SEEMA DAUD ◽  
RABIAH MAHWISH ◽  
HAJRA SHUJA

Background: WHO Guidelines recommends ‘‘My five moments for hand hygiene” for prevention of HCAI. Objective: Toassess the knowledge and practices of medical students about HCAI and hand hygiene. Setting: Lahore Medical & Dental College(LMDC), Lahore. Period: Four weeks, in January and February, 2012. Methods: Descriptive cross-sectional study was conducted usingWHO’s “Hand Hygiene Knowledge Questionnaire”, among MBBS students from 3rd to final years, 2012. Data was entered and cleaned inSPSS 19 and presented in tables and graphs. Descriptive statistics was used in the forms of numbers and percentages. Results: Among227 respondents, 63% were female, 67% were 20 to 22 years old, 38% were from 3rd year, 40% from 4th year and 22% from final year,61% never received hand hygiene training and 67% never used hand rubs. Few students named unclean hands as main route (42%) andsource of HCAI (21%). Hand hygiene was preferred before touching patients (76%) and after body fluid exposure (70%). It was perceivedto be rapid (63%), effective (66%), cause of skin dryness (57%) and it was supposed to be used concomitantly with hand washing (74%),before abdomen palpation (48%), giving injection (31%), after removing gloves (22%) and making patient’s bed (31%). Damaged skin(92%), artificial fingernails (78%) and jewelry (53%) were perceived to increase hand contamination. Conclusions: There were seriousgaps in knowledge of proper hand cleaning techniques and their importance in prevention of health HCAI. Hand hygiene, must be part ofcurriculum and training of all health care providers.


Author(s):  
Arvind Kumar ◽  
Arti Bahl ◽  
Sunil Gupta ◽  
Charan Singh ◽  
Sudhir Kumar Jain ◽  
...  

Background: The prescription audit is a useful method to assess the doctors’ contribution to the rational use of drugs in a country. A prescription is considered complete when it covers all the parts of the prescription. The polypharmacy increased the risk of drug interaction, dispensing errors and confused the patients for dosage schedules. A prescription with the minimum number of drugs per prescription helps in rational pharmacotherapeutics. The objectives of this study were to describe the pattern and completeness of prescription at rural health and training center and to estimate antibiotic consumption at rural health and training center.Methods: A descriptive cross-sectional study was conducted to determine the current prescribing practice at RHTC. Data were collected in the two pharmacies of the rural hospital. A total of 612 prescriptions with the last refill were considered for the assessment.Results: The average number of drugs prescribed per prescription 3.53. The percentage of prescriptions in which an antibiotic was prescribed was 20%. The percentage of drugs prescribed by generic name and from an essential drug list was 71.5% and 98.7% respectively. The most commonly prescribed form of antibiotics was extended-spectrum penicillin.Conclusions: All the prescriptions were complete covered parts of prescriptions. The dosing errors were present in maximum prescriptions. The WHO prescribing indicators were within the limits, an average number of drugs per prescription suggests a practice of polypharmacy. The peak of the use of antibiotics was observed in September followed by January and November. The least use of antibiotics was in December followed by June. 


2019 ◽  
Vol 2019 ◽  
pp. 1-6
Author(s):  
Yordanos Tsehai Jemberu ◽  
Yared Assefa Woldie ◽  
Wossen Mulugeta ◽  
Destaye Shiferaw Alemu ◽  
Getasew Mulat Bantie

Background. For so long, corneal diseases have been known as one of the leading causes to blindness in the global. This blindness might be due to failure to accept the corneal transplantation. Therefore, this study aimed to determine the prevalence and the root challenges for corneal transplantation acceptance at the University of Gondar tertiary eye care and training center, Ethiopia. Methods. An institution-based cross-sectional study was conducted among patients who had an indication for corneal transplantation at the University of Gondar tertiary eye care and training center since January 1, 2017, up to October 30, 2018. A structured questionnaire was used to collect the data and entered into Epi-Info 7 software and analyzed using SPSS version 20. Simple logistic regression was used to identify the associated factors of corneal transplantation acceptance. Associations between outcome and exposure variables were expressed by the adjusted odds ratio with a 95% confidence interval and p value <0.05. Result. A total of 116 patients with a mean age of 51 (±21) years participated in the study. The overall acceptance level of corneal transplantation was only 38.8% (95% CI: 29.93, 47.66). Patients with poor knowledge [AOR = 2.41; 95% CI: 1.90, 6.48] and an unfavorable attitude [AOR = 6.33; 95% CI: 2.42, 16.54] were significantly associated with the acceptance of corneal transplantation. Conclusion. The study revealed that the corneal transplantation acceptance level was very low. Hence, the government and other concerned stakeholders should give due emphasis to the awareness creation and behavior change communication strategies to increase the acceptance level of corneal transplantation.


2018 ◽  
Vol 31 ◽  
pp. 06008
Author(s):  
Endang Setiyani ◽  
Martini Martini ◽  
Lintang Dian Saraswati

The Gajah Mungkur sub-district in Semarang, Indonesia had highest leptospirosis cases (reported in human with seven infected and one dead) in 2015. The purpose of this study was to analyze the association between house sanitation and density of rats with Leptospira sp. infection in rats. The study design was cross sectional observational analytic. The number of 308 trapswere placed in study sites over three consecutive nights afterwards. Every houses were placed with four traps, inside and outside. Trapped rats were anesthetized with atropine dose from 0.02 to 0.05 mg/kg body weight of rats continued with Ketamine HCL dose of 50-100 mg/kg body weight of rats by injecting in the thick thigh muscle of it. After that, identification of rats by species and gender then continues with surgery in which a kidney sample was taken to confirm the presence of bacteria Leptospirasp using PCR techniques. The trap installed in 77 houses which later had further observation on house sanitation which includes the existence of a pile of used goods, food storage, garbage can, and the presence of the ceiling, windows and other ventilation.Data was analyzed using distribution frequency and bivariate chi-square test. We had 100 rats captured with live traps as the samples.The proportion of Rattusnorvegicuswas 27% (14.8% positive Leptospira sp.infection) and Rattustanezumi 73% (11%positive Leptospira sp.infection). The proportion of male and female rats were almost equal. The statistic test result was significant between the density of rats (p = 0.0001, OR 12.833, 95%CI: 1.565-105.261) and sex of rats (p = 0.019, OR 0.095, 95%CI: 0.012–0.769) with Leptospira sp. infection in rats. The number of rats may increase the infection of Leptospirasp., especially female rats and poor condition of house sanitation. It is recommended to improve house sanitation and regularly trapping rats.


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