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https://www.readbyqxmd.com/read/29151023/quadriceps-force-and-anterior-tibial-force-occur-obviously-later-than-vertical-ground-reaction-force-a-simulation-study
#1
Ryo Ueno, Tomoya Ishida, Masanori Yamanaka, Shohei Taniguchi, Ryohei Ikuta, Mina Samukawa, Hiroshi Saito, Harukazu Tohyama
BACKGROUND: Although it is well known that quadriceps force generates anterior tibial force, it has been unclear whether quadriceps force causes great anterior tibial force during the early phase of a landing task. The purpose of the present study was to examine whether the quadriceps force induced great anterior tibial force during the early phase of a landing task. METHODS: Fourteen young, healthy, female subjects performed a single-leg landing task. Muscle force and anterior tibial force were estimated from motion capture data and synchronized force data from the force plate...
November 18, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29150907/sensitivity-of-doping-biomarkers-after-administration-of-a-single-dose-testosterone-gel
#2
Jenny Mullen, Annica Börjesson, Oscar Hopcraft, Jenny J Schulze, Magnus Ericsson, Anders Rane, Mikael Lehtihet, Lena Ekström
Micro-doping with testosterone (T) is challenging to detect with the current doping tests. Today, the methods available to detect T are longitudinally monitoring of urine biomarkers in the Athlete Biological Passport (ABP) and measuring the isotopic composition of excreted biomarkers to distinguish the origin of the molecule. In this study, we investigated the detectability of a single dose of 100 mg T gel in 8 healthy male subjects. We also studied which biomarkers were most sensitive to T gel administration, including blood biomarkers...
November 18, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29150854/rhinitis-and-its-impact-on-quality-of-life-in-swimmers
#3
Pavol Surda, Matus Putala, Pavel Siarnik, Abigail Walker, Ana Bernic, Wytske Fokkens
INTRODUCTION: Limited data suggest that swimmers might be affected by rhinitis significantly more often than the general population. This can have impact on quality of life but also on performance. The aim of the present study was to determine the prevalence and impact of QOL of rhinitis in swimming compared to non-swimming athletes and controls. MATERIALS AND METHODS: This was an observational case control, questionnaire based study involving elite (n=101) and non-elite swimming athletes (n=107), non-swimming athletes (n = 38) and sex and age-matched controls (n = 50)...
November 18, 2017: Allergy
https://www.readbyqxmd.com/read/29150400/changes-in-student-athletes-self-efficacy-for-making-healthful-food-choices-and-food-preparation-following-a-cooking-education-intervention
#4
Jenna Ellis, Katie Brown, Samantha Ramsay, Jeremy Falk
No abstract text is available yet for this article.
November 15, 2017: Journal of Nutrition Education and Behavior
https://www.readbyqxmd.com/read/29150231/diagnosis-of-hyperferritinemia-in-routine-clinical-practice
#5
Bernard Lorcerie, Sylvain Audia, Maxime Samson, Aurélie Millière, Nicolas Falvo, Vanessa Leguy-Seguin, Sabine Berthier, Bernard Bonnotte
The discovery of hyperferritinemia is often fortuitous, revealed in results from a laboratory screening or follow-up test. The aim of the diagnostic procedure is therefore to identify its cause and to identify or rule out hepatic iron overload, in a three-stage process. In the first step, clinical findings and several simple laboratory tests are sufficient to detect four of the most frequent causes of high ferritin concentrations: alcoholism, inflammatory syndrome, cytolysis, and metabolic syndrome. None of these causes is associated with substantial hepatic iron overload...
November 14, 2017: La Presse Médicale
https://www.readbyqxmd.com/read/29149800/longitudinal-improvement-in-balance-error-scoring-system-scores-among-ncaa-division-i-football-athletes
#6
Ross E Mathiasen, Christopher P Hogrefe, Kari K Harland, Andrew Peterson, Kyle Smoot
INTRODUCTION: The Balance Error Scoring System (BESS) is a commonly used concussion assessment tool. Recent studies have questioned the stability and reliability of baseline BESS scores. The purpose of this longitudinal prospective cohort study is to examine differences in yearly baseline BESS scores in athletes participating on an NCAA Division-I football team. MATERIALS AND METHODS: NCAA Division-I freshman football athletes were videotaped performing the BESS test at matriculation and following one year of participation in the football program...
November 17, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29149240/z-scores-based-methods-and-their-application-to-biological-monitoring-an-example-in-professional-soccer-players
#7
Guillaume Saulière, Jérôme Dedecker, Laurie-Anne Marquet, Pierre Rochcongar, Jean-Francois Toussaint, Geoffroy Berthelot
The clinical and biological follow-up of individuals, such as the biological passport for athletes, is typically based on the individual and longitudinal monitoring of hematological or urine markers. These follow-ups aim to identify abnormal behavior by comparing the individual's biological samples to an established baseline. These comparisons may be done via different ways, but each of them requires an appropriate extra population to compute the significance levels, which is a non-trivial issue. Moreover, it is not necessarily relevant to compare the measures of a biomarker of a professional athlete to that of a reference population (even restricted to other athletes), and a reasonable alternative is to detect the abnormal values by considering only the other measurements of the same athlete...
November 15, 2017: Biostatistics
https://www.readbyqxmd.com/read/29149063/estimating-stair-running-performance-using-inertial-sensors
#8
Lauro V Ojeda, Antonia M Zaferiou, Stephen M Cain, Rachel V Vitali, Steven P Davidson, Leia A Stirling, Noel C Perkins
Stair running, both ascending and descending, is a challenging aerobic exercise that many athletes, recreational runners, and soldiers perform during training. Studying biomechanics of stair running over multiple steps has been limited by the practical challenges presented while using optical-based motion tracking systems. We propose using foot-mounted inertial measurement units (IMUs) as a solution as they enable unrestricted motion capture in any environment and without need for external references. In particular, this paper presents methods for estimating foot velocity and trajectory during stair running using foot-mounted IMUs...
November 17, 2017: Sensors
https://www.readbyqxmd.com/read/29148628/clinical-significance-of-st-depression-at-exercise-stress-testing-in-competitive-athletes-usefulness-of-coronary-ct-during-screening
#9
Fabio Sperandii, Emanuele Guerra, Eliana Tranchita, Carlo Minganti, Chiara Lanzillo, Antonia Nigro, Federico Quaranta, Attilio Parisi, Mauro DI Roma, Luciano Maresca, Federica Fagnani, Leonardo Calò
BACKGROUND: Congenital coronary anomalies (CCAs) and coronary artery disease (CAD) arouse intense scientific and clinical interest in sports medicine and sports cardiology medical communities because of their potential to trigger sudden cardiac death (SCD) in athletes. Exercise stress testing represent the first instrumental assessment to evaluate electrocardiographic changes during effort. Coronary computed tomography angiography (CCTA) is an advanced accurate noninvasive imaging modality for excluding CAD and abnormalities of origin and course of coronary vessels...
November 17, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29148228/evaluation-of-markers-out-of-the-steroid-profile-for-the-screening-of-testosterone-misuse-part-i-transdermal-administration
#10
Aristotelis Kotronoulas, Àlex Gomez-Gómez, Andreu Fabregat, Jordi Segura, Sheng Yang, Yanyi Xing, Wu Moutian, Josep Marcos, Jesús Joglar, Rosa Ventura, Oscar J Pozo
Although the introduction by WADA of the steroid module of the athlete biological passport (ABP) marked an important step forward in the screening of testosterone (T) misuse, it still remains one of the most difficult challenges in doping control analysis. The urinary determination of alternative markers has been recently reported as a promising tool for improving the screening of T oral administration. However, their evaluation for other, commonly used, administration routes is still required. The main goal of this study is the evaluation of the potential of two groups of metabolites (cysteinyl conjugated and glucuronoconjugated) after transdermal and intramuscular administration of T...
November 17, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29147670/isokinetic-extension-strength-is-associated-with-single-leg-vertical-jump-height
#11
Felix Fischer, Cornelia Blank, Tobias Dünnwald, Peter Gföller, Elmar Herbst, Christian Hoser, Christian Fink
Background: Isokinetic strength testing is an important tool in the evaluation of the physical capacities of athletes as well as for decision making regarding return to sports after anterior cruciate ligament (ACL) reconstruction in both athletes and the lay population. However, isokinetic testing is time consuming and requires special testing equipment. Hypothesis: A single-jump test, regardless of leg dominance, may provide information regarding knee extension strength through the use of correlation analysis of jump height and peak torque of isokinetic muscle strength...
November 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29147669/cervical-intervertebral-disc-degeneration-and-low-cervical-extension-independently-associated-with-a-history-of-stinger-syndrome
#12
Takayoshi Hakkaku, Koichi Nakazato, Koji Koyama, Karina Kouzaki, Kenji Hiranuma
Background: Stinger syndrome frequently occurs in athletes who compete in collision sports. Sharp pain and impairment of neck motion are major symptoms. Cervical intervertebral disc degeneration (CIDD) is also frequently observed in those who compete in collision sports. Purpose/Hypothesis: To investigate whether CIDD and neck functionality are related to a history of stinger syndrome. The hypothesis was that a significant relationship exists between CIDD and neck motion and a history of stinger syndrome in Japanese collegiate football players...
November 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29146459/factors-influencing-food-choice-of-athletes-at-international-competition-events
#13
Fiona E Pelly, Sarah J Burkhart, Peter Dunn
Although the nutrient requirements and dietary intake of athletes have been thoroughly investigated, little is known about the influences on their food choice, particularly prior to and during competition. This study sought to investigate factors that influence food selection of athletes at two similar international competition events: the Melbourne 2006 and Delhi 2010 Commonwealth Games. A secondary aim was to explore differences in these factors between at each event given the culturally diverse locations...
November 13, 2017: Appetite
https://www.readbyqxmd.com/read/29146296/anomalous-origin-of-coronary-arteries-from-the-wrong-sinus-in-athletes-diagnosis-and-management-strategies
#14
Vincenzo Palmieri, Salvatore Gervasi, Massimiliano Bianco, Roberta Cogliani, Barbara Poscolieri, Francesco Cuccaro, Riccardo Marano, Mario Mazzari, Cristina Basso, Paolo Zeppilli
AIMS: Although anomalous origin of left (AOLCA) and right coronary artery (AORCA) from the wrong sinus may cause sudden death (SD) in athletes, early diagnosis and management of these anomalies are still challenging. We analysed clinical/instrumental profiles of athletes identified with AOLCA/AORCA focusing our attention on diagnosis, management and follow-up. METHODS AND RESULTS: We report 23 athletes (17 males, mean age 27±17yrs.), 6 with AOLCA and 17 with AORCA...
November 8, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/29146288/unusual-iliac-crest-stress-fracture-in-a-marathoner-a-case-report
#15
Amy M West, Kelly C McInnis
This case presentation describes a 50-year-old healthy woman who developed left sided hip pain while training for the Boston Marathon. Magnetic Resonance Imaging (MRI) demonstrates a stress fracture of the left iliac body. This injury is unique in that it did not occur in the setting of low bone mineral density and it does not fall into the current published radiographic categorization based on location of injury. This case illustrates an uncommon and atypical bone stress injury in an endurance athlete. It should be considered in the differential diagnosis of runners presenting with hip or lumbopelvic pain...
November 13, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29146284/supervised-learning-techniques-and-their-ability-to-classify-a-change-of-direction-task-strategy-using-kinematic-and-kinetic-features
#16
Chris Richter, Enda King, Eanna Falvey, Andrew Franklyn-Miller
This study examines the ability of commonly used supervised learning techniques to classify the execution of a maximum effort change of direction task into predefined movement pattern as well as the influence of fuzzy executions and the impact of selected features (e.g. peak knee flexion) towards classification accuracy. The experiment utilized kinematic and kinetic data from 323 male subjects with chronic athletic groin pain. All subjects undertook a biomechanical assessment and had been divided previously into 3 different movement strategies in an earlier paper...
October 31, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29146160/posterolateral-corner-injuries-of-the-knee-at-the-national-football-league-combine-an-imaging-and-outcomes-analysis
#17
Jorge Chahla, Nicholas I Kennedy, Mark E Cinque, George Sanchez, Catherine Logan, Bryan G Vopat, Brendin Beaulieu-Jones, Mark Price, Jim Whalen, Robert F LaPrade, Matthew T Provencher
PURPOSE: (1) To determine the epidemiology, examination findings, imaging findings, and associated injuries of posterolateral corner (PLC) injuries in players participating in the National Football League (NFL) Combine and (2) to evaluate the impact of PLC injuries on performance compared with matched controls. METHODS: All PLC injuries identified at the NFL Combine between 2009 and 2015 were reviewed. The inclusion criteria were any player who had clinical findings or a previous surgical procedure consistent with a PLC injury and who participated in medical and performance testing at the NFL Combine...
November 13, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29145769/exact-statistical-calculation-of-the-uncertainty-term-in-the-decision-limits-of-the-gh-2000-score-for-growth-hormone-misuse-doping-detection
#18
Dankmar Böhning, Wei Liu, Richard Ig Holt, Walailuck Böhning, Nishan Guha, Peter Sönksen, David Cowan, Tianyi Liang
The GH-2000 score has been developed as a powerful and unique technique for the detection of growth hormone misuse by sportsmen and women. The score depends upon the measurement of two growth hormone sensitive markers, insulin-like growth factor-I and the amino-terminal pro-peptide of type III collagen. It also includes a term to adjust for the age of the athlete. Decision limits for the GH-2000 score have been developed and are incorporated into the guidelines of the World Anti-Doping Agency. These decision limits are derived by setting a 1 in 10,000 false-positive rate rule...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/29145504/quantifying-performance-on-an-outdoor-agility-drill-using-foot-mounted-inertial-measurement-units
#19
Antonia M Zaferiou, Lauro Ojeda, Stephen M Cain, Rachel V Vitali, Steven P Davidson, Leia Stirling, Noel C Perkins
Running agility is required for many sports and other physical tasks that demand rapid changes in body direction. Quantifying agility skill remains a challenge because measuring rapid changes of direction and quantifying agility skill from those measurements are difficult to do in ways that replicate real task/game play situations. The objectives of this study were to define and to measure agility performance for a (five-cone) agility drill used within a military obstacle course using data harvested from two foot-mounted inertial measurement units (IMUs)...
2017: PloS One
https://www.readbyqxmd.com/read/29145309/short-term-effects-of-sports-taping-on-navicular-height-navicular-drop-and-peak-plantar-pressure-in-healthy-elite-athletes-a-within-subject-comparison
#20
Taegyu Kim, Jong-Chul Park
Medial tibial stress syndrome (MTSS) is one of the most common exercise-induced leg pain. The navicular drop (ND) was identified as a risk factor for MTSS. This study aimed to evaluate the short-term effects of sports taping applied to the supporting lower leg during sitting, standing, walking, and jogging to restrict the ND in healthy elite athletes.Twenty-four healthy elite athletes without a history of exercise-induced pain or injuries in the lower limbs participated in this study (median age: 21.00 years; 1st--3rd quartiles; 19...
November 2017: Medicine (Baltimore)
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