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https://www.readbyqxmd.com/read/28444836/ephedra-alkaloid-contents-of-chinese-herbal-formulae-sold-in-taiwan
#1
Chih-Wei Chang, Szu-Yun Hu, Guan-Qian Huang, Mei-Chich Hsu
Consumption of Ephedra alkaloids has been prohibited in-competition by the World Anti-Doping Agency (WADA). In Taiwan, colds are often treated with Chinese herbal formulae containing Herba Ephedrae. We screened the products sold in Taiwan and preliminarily assessed their relationships with WADA threshold violations. Fifty-six concentrated powder products, including 19 Chinese herbal formulae that contained Herba Ephedrae, were collected. The content of Ephedra alkaloids, namely ephedrine (E), methylephedrine (ME), norpseudoephedrine (NPE; cathine), pseudoephedrine (PE), and norephedrine (NE; phenylpropanolamine), was determined using a validated high-performance liquid chromatography method...
April 25, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28442144/a-proposal-to-evaluate-the-fibers-break-probability-in-ligaments-and-tendons
#2
Marco Bontempi
Understanding the yield and failure mechanisms of ligaments and tendons is important to have a deeper knowledge of their structure and function. Evaluating what are the limits of the human body is also important to prevent injuries in workers, in athletes and the elderly. The tissue yield mechanism was analyzed by modifying and extending a probabilistic model of collagen bundles. Since not usable experimental data are available in the literature, the model and the method were tested using Monte Carlo simulations...
April 13, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28441760/supplementation-with-a-polyphenol-rich-extract-perfload-%C3%A2-improves-physical-performance-during-high-intensity-exercise-a-randomized-double-blind-crossover-trial
#3
Julien Cases, Cindy Romain, Cristian Marín-Pagán, Linda H Chung, José Miguel Rubio-Pérez, Caroline Laurent, Sylvie Gaillet, Emmanuelle Prost-Camus, Michel Prost, Pedro E Alcaraz
Workout capacity is energy-production driven. To produce peak metabolic power outputs, the organism predominantly relies more on anaerobic metabolism, but this undoubtedly has a negative and limiting impact on muscle function and performance. The aim of the study was to evaluate if an innovative polyphenol-based food supplement, PerfLoad(®), was able to improve metabolic homeostasis and physical performance during high-intensity exercises under anaerobic conditions. The effect of a supplementation has been investigated on fifteen recreationally-active male athletes during a randomized, double-blind and crossover clinical investigation...
April 24, 2017: Nutrients
https://www.readbyqxmd.com/read/28439639/searching-for-consensus-in-the-approach-to-patients-with-chronic-lateral-ankle-instability-ask-the-expert
#4
Frederick Michels, H Pereira, J Calder, G Matricali, M Glazebrook, S Guillo, J Karlsson, Jorge Acevedo, Jorge Batista, Thomas Bauer, James Calder, Dominic Carreira, Woojin Choi, Nuno Corte-Real, Mark Glazebrook, Ali Ghorbani, Eric Giza, Stéphane Guillo, Kenneth Hunt, Jon Karlsson, S W Kong, Jin Woo Lee, Frederick Michels, Andy Molloy, Peter Mangone, Kentaro Matsui, Caio Nery, Saturo Ozeki, Chris Pearce, Hélder Pereira, Anthony Perera, Bas Pijnenburg, Fernando Raduan, James Stone, Masato Takao, Yves Tourné, Jordi Vega
PURPOSE: The purpose of this study is to propose recommendations for the treatment of patients with chronic lateral ankle instability (CAI) based on expert opinions. METHODS: A questionnaire was sent to 32 orthopaedic surgeons with clinical and scientific experience in the treatment of CAI. The questions were related to preoperative imaging, indications and timing of surgery, technical choices, and the influence of patient-related aspects. RESULTS: Thirty of the 32 invited surgeons (94%) responded...
April 25, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28439212/effect-of-thyme-extract-supplementation-on-lipid-peroxidation-antioxidant-capacity-pgc-1%C3%AE-content-and-endurance-exercise-performance-in-rats
#5
Mostafa Khani, Pezhman Motamedi, Mohammad Reza Dehkhoda, Saeed Dabagh Nikukheslat, Pouran Karimi
BACKGROUND: Athletes have a large extent of oxidant agent production. In the current study, we aimed to determine the influence of thyme extract on the endurance exercise performance, mitochondrial biogenesis, and antioxidant status in rats. METHODS: Twenty male Wistar rats were randomly divided into two groups receiving either normal drinking water (non-supplemented group, n = 10) or thyme extract, 400 mg/kg, (supplemented group, n = 10). Rats in both groups were subjected to endurance treadmill training (27 m/min, 10% grade, 60 min, and 5 days/week for 8 weeks)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28436336/cardiovascular-screening-of-young-athletes-a-review-of-economic-evaluations
#6
Sophie Gerkens, Hans Van Brabandt, Anja Desomer, Christian Leonard, Mattias Neyt
OBJECTIVES: Some experts have promoted preparticipative cardiovascular screening programs for young athletes and have claimed that such programs were cost-effective without performing a critical analysis of studies supporting this statement. In this systematic review, a critical assessment of economic evaluations on these programs is performed to determine if they really provide value for money. METHODS: A systematic review of economic evaluations was performed on December 24, 2014...
April 24, 2017: International Journal of Technology Assessment in Health Care
https://www.readbyqxmd.com/read/28435337/treatment-strategies-for-the-female-athlete-triad-in-the-adolescent-athlete-current-perspectives
#7
REVIEW
Jill Thein-Nissenbaum, Erin Hammer
Since the passage of Title IX in 1972, female sports participation has dramatically increased. The benefits of physical activity, including decreased risk for heart disease and diabetes as well as improved body image and self-esteem, far outweigh the risks. However, a select population of adolescent and young adult females may experience symptoms related to the female athlete triad (Triad), which refers to the interrelatedness of energy availability, menstrual function, and bone mineral density (BMD). These conditions often manifest clinically as disordered eating behaviors, menstrual irregularity, and stress fractures; an individual may suffer from 1 or all of the Triad components simultaneously...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/28433808/comparisons-of-hip-strength-and-countermovement-jump-height-in-elite-tennis-players-with-and-without-acute-history-of-groin-injuries
#8
V Moreno-Pérez, A Lopez-Valenciano, D Barbado, J Moreside, J L L Elvira, F J Vera-Garcia
BACKGROUND: Despite the high groin-injury (GI) prevalence in tennis, no studies have assessed the extent to which intrinsic groin injury risk factors, such as hip muscle strength, have recovered in elite tennis players with a history of previous GI. OBJECTIVE: To investigate whether elite tennis players with a history of GI show differences in hip strength and jump height between injured and uninjured limbs and compared with dominant limb in tennis players without history of acute groin-injuries (NGI)...
April 13, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28432076/is-lower-hip-range-of-motion-a-risk-factor-for-groin-pain-in-athletes-a-systematic-review-with-clinical-applications
#9
REVIEW
Igor Tak, Leonie Engelaar, Vincent Gouttebarge, Maarten Barendrecht, Sylvia Van den Heuvel, Gino Kerkhoffs, Rob Langhout, Janine Stubbe, Adam Weir
BACKGROUND: Whether hip range of motion (ROM) is a risk factor for groin pain in athletes is not known. OBJECTIVES: To systematically review the relationship between hip ROM and groin pain in athletes in cross-sectional/case-control and prospective studies. STUDY DESIGN: Systematic review, prospectively registered (PROSPERO) according to PRISMA guidelines. METHODS: Pubmed, Embase, CINAHL and SPORTDiscus were systematically searched up to December 2015...
April 21, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28431408/the-effects-of-exercise-modality-during-additional-high-intensity-interval-training-upon-aerobic-fitness-and-strength-in-powerlifting-and-strongman-athletes
#10
Patroklos Androulakis-Korakakis, Louis Langdown, Adam Lewis, James Fisher, Paulo Gentil, Antonio Paoli, James Steele
Powerlifters and strongman athletes have a necessity for optimal levels of muscular strength whilst maintaining sufficient aerobic capacity to perform and recover between events. HIIT has been popularized for its efficacy in improving both aerobic fitness and strength but never assessed within the aforementioned population group. The present study looked to compare the effect of exercise modality, e.g. a traditional aerobic mode (AM), and strength mode, (SM), during HIIT upon aerobic fitness and strength. Sixteen well resistance trained male participants, currently competing in powerlifting and strongman events, completed 8 weeks of approximately effort- and volume-matched HIIT in 2 groups: AM (cycling, n=8) and SM (resistance training, n=8)...
April 21, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28431031/sandbagging-on-the-immediate-post-concussion-assessment-and-cognitive-testing-impact-in-a-high-school-athlete-population
#11
Kathryn L Higgins, Robert L Denney, Arthur Maerlender
The Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) is a computerized neuropsychological test battery commonly used to assess cognitive functioning after a concussion. It is recommended that application of ImPACT utilizes a baseline administration so athletes have an individualized baseline with which to compare post-injury results should they sustain a concussion. It has been suggested that athletes may provide suboptimal effort, called "sandbagging," in order to return to their baseline cognitive scores, and thus to play, more quickly...
May 1, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28429996/are-athletes-doping-related-attitudes-predicted-by-their-perceptions-of-coaches-confrontation-efficacy
#12
Philip Sullivan, Parmida Razavi
BACKGROUND: The coaching process is complex and dynamic. Coaches are known to affect athlete attitudes indirectly, through athletes' perceptions and interpretations. This process has been verified with a variety of ethical behaviors. OBJECTIVES: The current study investigated the relationships between athletes' perceived doping confrontation efficacy of their coaches and athlete's anti-doping attitudes. METHODS: A sample of athletes (N = 96) completed a version of the Doping Confrontation Efficacy Scale that was modified to assess their perception of their coaches' anti-doping confrontation efficacy, and the PEAS (Performance Enhancing Attitude Scale), which assessed their performance-enhancing attitudes...
April 21, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28426513/evaluation-of-the-functional-movement-screen-and-a-novel-basketball-mobility-test-as-an-injury-prediction-tool-for-collegiate-basketball-players
#13
Colin W Bond, Jason C Dorman, Tryg O Odney, Scott J Roggenbuck, Steven W Young, Thayne A Munce
Identifying injury risk and implementing preventive measures can assist in reducing injury occurrence and may ultimately improve athletic performance. Improper movement patterns often contribute to musculoskeletal (MSK) injuries. The validity of the Functional Movement Screen (FMS™) as an injury prediction tool for athletes remains unclear. We designed the Basketball-Specific Mobility Test (BMT) to represent the neuromuscular demands of basketball and identify deficiencies that may be indicative of greater MSK injury risk while playing this sport...
April 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28424849/ultrasound-evaluation-of-the-ulnar-collateral-ligament-of-the-elbow-which-method-is-most-reproducible
#14
Mehool Shukla, Robert Keller, Nathan Marshall, Hafeez Ahmed, Courtney Scher, Vasilios Bill Moutzouros, Marnix van Holsbeeck
INTRODUCTION: The ulnar collateral ligament (UCL) is an important medial stabilizer of the elbow, particularly in overhead-throwing athletes. However, there is no universally accepted method for evaluating UCL thickness with ultrasound (US). OBJECTIVE: To assess reproducibility of previously published methods, as well as a modified technique, for evaluating the UCL via US. We hypothesize that a modified technique would show greater reproducibility. MATERIAL AND METHODS: Using US, the thickness of the UCL in 50 volunteers was measured by two musculoskeletal trained radiologists using two different measurement techniques...
April 20, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28422802/validity-and-repeatability-of-a-novel-dynamic-visual-acuity-system
#15
Mariko Hirano, Natalie Hutchings, Trefford Simpson, Kristine Dalton
PURPOSE: In many sports, athletes rely on visual information from the environment to perform. Some literature suggests athletes have superior visual abilities to non-athletes, particularly on tasks representative of the visual demands of their sport, such as dynamic acuity, eye movement accuracy and speed, and peripheral vision. Other literature suggests there is no difference between athletes and non-athletes, at least when standard clinical assessments are employed. A limitation of the literature is that almost none of the research has been conducted with standardized, validated tools...
May 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28422588/alterations-in-redox-homeostasis-during-recovery-from-unexplained-underperformance-syndrome-in-an-elite-international-rower
#16
Nathan A Lewis, Ann Redgrave, Mark Homer, Richard Burden, Wendy Martinson, Brian Moore, Charles R Pedlar
PURPOSE: This case study of an international rower examines a diagnosis of Unexplained Under Performance Syndrome (UUPS or Overtraining Syndrome) describing a full recovery and return to elite competition the same year. METHODS: On diagnosis and 4 and 14 months post-diagnosis, detailed assessments including physiological, nutritional, and biomarkers were made. RESULTS: Clinical examination and laboratory results for haematology, biochemistry, thyroid function, immunology, vitamins and minerals were unremarkable and did not explain the presentation and diagnosis...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28422520/low-level-laser-therapy-improves-performance-and-reduces-fatigue-in-competitive-cyclists
#17
Fábio J Lanferdini, Rodrigo R Bini, Bruno M Baroni, Kelli D Klein, Felipe P Carpes, Marco A Vaz
Evidence supports that low-level laser therapy (LLLT) minimizes fatigue effects on muscle performance. However, the ideal LLLT dosage to improve athletes' performance during sports activities, such as cycling, is still unclear. Therefore, the goal of this study was to investigate the effects of different LLLT dosages on cyclists' performance in time-to-exhaustion tests. In addition, we looked at the effects of LLLT on the frequency content of the EMG signals to assess fatigue mechanisms. Twenty male competitive cyclists participated in a crossover, randomized, double-blind and placebo-controlled trial...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28421796/effect-of-satiety-on-body-composition-and-anxiety-in-university-athletes-cohort-study
#18
Alejandro Martínez-Rodríguez, Enrique Roche
BACKGROUND: Satiety is a determining parameter in nutrient intake control, which in the long run impacts on body weight. Many athletes need strict control on their weight to achieve their aims of the season. AIM: The aim of this study is to analyse the influence of satiety on body weight control and competitive anxiety in a university athletes population when they ingest ad libitum foods (SATIETY), or follow a nutritional dietary programme (DIET). METHODS: The present study was a cohort study, in which 40 male university athletes participated...
March 30, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28420360/operative-versus-conservative-treatment-of-apophyseal-avulsion-fractures-of-the-pelvis-in-the-adolescents-a-systematical-review-with-meta-analysis-of-clinical-outcome-and-return-to-sports
#19
H Eberbach, L Hohloch, M J Feucht, L Konstantinidis, N P Südkamp, J Zwingmann
BACKGROUND: Avulsion fractures of the pelvic apophyses typically occur in adolescent athletes due to a sudden strong muscle contraction while growth plates are still open. The main goals of this systematic review with meta-analysis were to summarize the evidence on clinical outcome and determine the rate of return to sports after conservative versus operative treatment of avulsion fractures of the pelvis. METHODS: A systematic search of the Ovid database was performed in December 2016 to identify all published articles reporting outcome and return to preinjury sport-level after conservative or operative treatment of avulsion fractures of the pelvis in adolescent patients...
April 19, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28418696/eccentric-exercise-kinesiology-tape-and-balance-in-healthy-men
#20
Simona Hosp, Ramona Folie, Robert Csapo, Michael Hasler, Werner Nachbauer
CONTEXT:   Deficits in balance have been identified as a possible risk factor for knee injuries in athletes. Despite a lack of evidence for its effectiveness, kinesiology tape (KT) is widely used to prevent knee injuries. OBJECTIVE:   To investigate the influence of KT at the knee joint on balance ability in healthy men after eccentric exercise. DESIGN:   Crossover study. SETTING:   University laboratory. PATIENTS OR OTHER PARTICIPANTS:   Twelve young men with no history of lower limb injury volunteered for the study (age = 23...
April 18, 2017: Journal of Athletic Training
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