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https://www.readbyqxmd.com/read/29775989/higher-accuracy-of-the-lactate-minimum-test-compared-to-established-threshold-concepts-to-determine-maximal-lactate-steady-state-in-running
#1
Patrick Wahl, Lukas Zwingmann, Christian Manunzio, Jacob Wolf, Wilhelm Bloch
This study evaluated the accuracy of the lactate minimum test, in comparison to a graded-exercise test and established threshold concepts (OBLA and mDmax) to determine running speed at maximal lactate steady state. Eighteen subjects performed a lactate minimum test, a graded-exercise test (2.4 m·s-1 start,+0.4 m·s-1 every 5 min) and 2 or more constant-speed tests of 30 min to determine running speed at maximal lactate steady state. The lactate minimum test consisted of an initial lactate priming segment, followed by a short recovery phase...
May 18, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29775985/sensorimotor-exercises-and-enhanced-trunk-function-a-randomized-controlled-trial
#2
Steffen Mueller, Tilman Engel, Juliane Mueller, Josefine Stoll, Heiner Baur, Frank Mayer
The aim of this study was to investigate the effect of a 6-week sensorimotor or resistance training on maximum trunk strength and response to sudden, high-intensity loading in athletes.Forty-three healthy, well-trained participants were randomized into sensorimotor (SMT; n=11), resistance training (RT; n=16) and control groups (CG; n=16). Treatment groups received either sensorimotor training (SMT) or resistance training (RT) for 6 weeks, 3 times a week. At baseline and after 6 weeks of intervention, participants' maximum isokinetic strength in trunk rotation and extension was tested (concentric/eccentric 30°/s)...
May 18, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29775802/nonoperative-management-of-a-severe-proximal-rectus-femoris-musculotendinous-injury-in-a-recreational-athlete-a-case-report
#3
Park Ck, Zlomislic V, Du J, Huang Bk, Chang Ey, Chang Dg
This report describes a severe injury to the proximal rectus femoris (RF) muscle in a 37-year-old recreational athlete. This injury is a relatively rare occurrence in both the general and elite athletic populations. Acute and long-term imaging and functional outcomes are described. This athlete was able to return to full activity without surgical intervention. Follow-up imaging demonstrated gross healing of both complete (or near complete) muscle and tendon tears.
May 15, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29775561/isolation-and-characterization-of-a-novel-anti-salbutamol-chicken-scfv-for-human-doping-urinalysis
#4
Warren Lee, Syed A Ali, Leow Chiuan Yee, Tan Soo Choon, Leow Chiuan Herng
Anti-salbutamol antibodies remain as important tools for the detection of salbutamol abuse in athletic doping. This study evaluated the feasibility and efficiency of the chicken (Gallus gallus domesticus) as an immunization host to generate anti-salbutamol scFv antibodies by phage display. A phage display antibody library was constructed from a single chicken immunized against salbutamol-KLH conjugate. After a stringent biopanning strategy, a novel scFv clone which was inhibited by free salbutamol recorded the highest affinity...
May 15, 2018: Analytical Biochemistry
https://www.readbyqxmd.com/read/29775483/ldha-gene-is-associated-with-pigeon-survivability-during-racing-competitions
#5
Sherif Ramadan, Takeshi Miyake, Junichi Yamaura, Miho Inoue-Murayama
Pigeon racing is a popular sport worldwide. Pigeons are under continuous selection to improve speed, spatial orientation, and endurance during long flights. However, numerous genetic and non-genetic factors affect survivability and homing ability, making such traits difficult for breeders to control. Polymorphisms in the lactate dehydrogenase A gene (LDHA) likely affects pigeon racing and homing abilities, due to its role in physical and mental performance. Additionally, the adenylate cyclase activating polypeptide 1 gene (ADCYAP1) has been associated with physiological and behavioral shifts that occur during avian migration...
2018: PloS One
https://www.readbyqxmd.com/read/29775388/epidemiology-of-elbow-ulnar-collateral-ligament-injuries-among-baseball-players-national-collegiate-athletic-association-injury-surveillance-program-2009-2010-through-2013-2014
#6
Steven F DeFroda, Avi D Goodman, Joseph A Gil, Brett D Owens
BACKGROUND: Injuries to the ulnar collateral ligament (UCL) of the elbow are of major concern in baseball; however, the epidemiology of these injuries among National Collegiate Athletic Association (NCAA) athletes is poorly described. PURPOSE: To determine the incidence of UCL injuries in NCAA baseball and investigate the risk factors involved. STUDY DESIGN: Descriptive epidemiology study. METHODS: All UCL injuries for academic years 2009-2010 through 2013-2014 were extracted from the NCAA Injury Surveillance Program database...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29775379/decision-to-return-to-sport-participation-after-anterior-cruciate-ligament-reconstruction-part-ii-self-reported-and-functional-performance-outcomes
#7
Jennifer L Werner, Julie P Burland, Carl G Mattacola, Jenny Toonstra, Robert A English, Jennifer S Howard
CONTEXT:   Anterior cruciate ligament (ACL) reconstruction (ACLR) is the most commonly used method for helping athletes regain function and return to preinjury activity levels after ACL injury. Outcomes after ACLR have suggested that athletes return to a level of function that would support a return to sport participation; however, in a recent meta-analysis, pooled return rates were only 55%. It is unclear whether this discrepancy is a result of functional impairments. OBJECTIVE:   To compare patient-reported outcomes (PROs), dynamic balance, dynamic functional performance, strength, and muscular endurance in athletes who have returned to sport (RTS) and athletes who have not returned to sport (NRTS) after ACLR...
May 18, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29775081/reference-values-of-left-heart-echocardiographic-dimensions-and-mass-in-male-peri-pubertal-athletes
#8
Elena Cavarretta, Francesco Maffessanti, Fabio Sperandii, Emanuele Guerra, Federico Quaranta, Antonia Nigro, Monia Minati, Marco Rebecchi, Chiara Fossati, Leonardo Calò, Fabio Pigozzi
Background Several articles have proposed reference values in healthy paediatric subjects, but none of them has evaluated a large population of healthy trained adolescents. Design The study purpose was to establish normal echocardiographic measurements of left heart (aortic root, left atrium and left ventricular dimensions and mass) in relation to age, weight, height, body mass index, body surface area and training hours in this specific population. Methods We retrospectively evaluated 2151 consecutive, healthy, peri-pubertal athletes (100% male, mean age 12...
January 1, 2018: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/29774866/femoral-neck-stress-fracture-in-a-young-female-recruit-case-report
#9
Hélder Fonte, Ricardo Rodrigues-Pinto
INTRODUCTION: Femoral neck stress fractures are uncommon and depending on their location, can be at high risk for non-union and significant morbidity.  Their prevalence is higher among runners and military recruits, and women seem to be at higher risk. METHODS: A 27-year-old female, who was enrolled in military recruit, reported left side groin pain after a strenuous running exercise. Due to persistent pain an X-Ray was ordered, which revealed no signs of acute lesions...
2018: SICOT-J
https://www.readbyqxmd.com/read/29773412/athlete-s-heart-is-the-morganroth-hypothesis-obsolete
#10
Mark J Haykowsky, T Jake Samuel, Michael D Nelson, Andre La Gerche
In 1975, Morganroth and colleagues reported that the increased left ventricular (LV) mass in highly trained endurance athletes versus nonathletes was primarily due to increased end-diastolic volume while the increased LV mass in resistance trained athletes was solely due to an increased LV wall thickness. Based on the divergent remodelling patterns observed, Morganroth and colleagues hypothesised that the increased "volume" load during endurance exercise may be similar to that which occurs in patients with mitral or aortic regurgitation while the "pressure" load associated with performing a Valsalva manoeuvre (VM) during resistance exercise may mimic the stress imposed on the heart by systemic hypertension or aortic stenosis...
May 1, 2018: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29773085/psychometric-properties-of-dispositional-hope-scale-for-brazilian-sport-context
#11
Caio Rosas Moreira, José Roberto Andrade Nascimento-Junior, Renan Codonhato, Lenamar Fiorese
This study investigated the psychometric properties of the Dispositional Hope Scale (DHS) for the Brazilian sport context. The sample for construct validity consisted of 474 athletes; internal validity was assessed with 101 athletes; and external validity was tested in 81 athletes, from which, were 55 had further participated in the temporal stability assessment. Data analysis was conducted through the following tests: Cronbach's alpha, Composite Reliability (CR), Exploratory Factor Analysis (EFA), Confirmatory Factor Analysis (CFA), Spearman Correlation Coefficient and intraclass correlation...
May 18, 2018: Spanish Journal of Psychology
https://www.readbyqxmd.com/read/29772981/treatment-of-recent-onset-atrial-fibrillation-with-quinidine-and-flecainide-in-thoroughbred-racehorses-107-cases-1987-2014
#12
Yuji Takahashi, Yuhiro Ishikawa, Hajime Ohmura
OBJECTIVE To compare the efficacy of quinidine and flecainide in treating naturally occurring, recent-onset atrial fibrillation (AF) in Thoroughbred racehorses. DESIGN Retrospective case series. ANIMALS 107 Thoroughbred racehorses. PROCEDURES Medical records of racehorses with AF that were treated with quinidine or flecainide between 1987 and 2014 were reviewed. Signalment, history, treatments, complications, and outcome data were collected. Horses were allocated to 2 groups according to the initial treatment: initial treatment with quinidine (group 1) or initial treatment with flecainide (group 2)...
June 1, 2018: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/29772943/school-nurses-management-and-collaborative-practices-for-student-athletes-following-sport-related-concussion
#13
Michelle L Weber, Cailee E Welch Bacon, Tamara Valovich McLeod
The purpose of this study was to examine school nurses' management and collaboration with health-care providers (HCPs) for student-athletes following a concussion. Secondary school nurses accessed an online survey titled the Beliefs, Attitudes, and Knowledge of Pediatric Athletes with Concussions (access rate = 15.6%; n = 1,246/8,000). Approximately 40% of schools where nurses were employed administered baseline and postinjury concussion assessments. No significant differences were found between employment model (single vs...
January 1, 2018: Journal of School Nursing: the Official Publication of the National Association of School Nurses
https://www.readbyqxmd.com/read/29772412/tactile-cues-can-change-movement-an-example-using-tape-to-redistribute-flexion-from-the-lumbar-spine-to-the-hips-and-knees-during-lifting
#14
Brendan L Pinto, Shawn M Beaudette, Stephen H M Brown
Given the appropriate cues, kinematic factors associated with low back injury risk and pain, such as spine flexion, can be avoided. Recent research has demonstrated the potential for tactile sensory information to change movement. In this study an athletic strapping tape was applied bilaterally along the lumbar extensor muscles to provide continuous tactile feedback information during a repeated lifting and lowering task. The presence of the tape resulted in a statistically significant reduction in lumbar spine flexion when compared to a baseline condition in which no tape was present...
May 14, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29772188/hamstring-and-ankle-flexibility-deficits-are-weak-risk-factors-for-hamstring-injury-in-professional-soccer-players-a-prospective-cohort-study-of-438-players-including-78-injuries
#15
Nicol van Dyk, Abdulaziz Farooq, Roald Bahr, Erik Witvrouw
BACKGROUND: Hamstring injuries remain a significant injury burden in sports such as soccer that involve high-speed running. It has repeatedly been identified as the most common noncontact injury in elite male soccer, representing 12% of all injuries. As the incidence of hamstring injuries remains high, investigations are aimed at better understanding how to prevent hamstring injuries. Stretching to improve flexibility is commonly used in elite-level sports, but risk factor studies have reported contradicting results, leading to unclear conclusions regarding flexibility as a risk factor for hamstring injuries...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29772095/effect-of-specific-exercise-strategy-on-strength-and-proprioception-in-volleyball-players-with-infraspinatus-muscle-atrophy
#16
José Inácio Salles, Victor Rodrigues Amaral Cossich, João Matheus Guimarães, Geraldo Motta Filho, Dylan Morrissey
Infraspinatus muscle atrophy is common in professional volleyball players, but it is unclear whether commonly observed strength and proprioception deficits can be reversed with training. Fifty-four participants were recruited into an infraspinatus atrophy group (IAG, n = 18) and a non-atrophy group (NAG, n=18) of elite volleyballers plus a healthy non-athletic control group (CG, n = 18). IAG were trained with a progressive, specific shoulder external rotator strengthening routine for 32 sessions over 8 weeks...
May 17, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29771750/injectable-nonsteroidal-anti-inflammatory-drugs-in-sport
#17
Matthew J Matava
OBJECTIVE: The primary objective of this article is to review the basic science of nonsteroidal anti-inflammatory drugs (NSAIDs), their clinical effects, indications, potential complications, and ethical issues associated with the use of injectable NSAIDs in the treatment of athletes. These objectives are presented taking into consideration the contemporaneous issues associated with the treatment of amateur and professional athletes. DATA SOURCES: A nonformal review of the published medical literature and lay media focusing on the use of injectable NSAIDs in athletes was used for this article...
May 10, 2018: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29771609/achilles-tendon-structure-differs-between-competitive-distance-runners-and-non-runners-despite-no-clinical-signs-or-symptoms-of-mid-substance-tendinopathy
#18
Todd J Hullfish, Kenton L Hagan, Ellen Casey, Josh R Baxter
Achilles tendinopathy affects many running athletes and often leads to chronic pain and functional deficits. While changes in tendon structure have been linked with tendinopathy, the effects of distance running on tendon structure is not well understood. Therefore, the purpose of this study was to characterize structural differences in the Achilles tendons in healthy young adults and competitive distance runners using quantitative ultrasound analyses. We hypothesized that competitive distance runners with no clinical signs or symptoms of tendinopathy would have quantitative signs of tendon damage, characterized by decreased collagen alignment and echogenicity, in addition to previous reports of thicker tendons...
May 17, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29771139/it-s-a-hard-knock-life-game-load-fatigue-and-injury-risk-in-the-national-basketball-association
#19
Melanie Lewis
CONTEXT:   National Basketball Association (NBA) athletes experience a high rate of injuries. Injury prevention requires identifying observable and controllable risk factors. OBJECTIVE:   To examine the relationship among game load, fatigue, and injuries in NBA athletes. DESIGN:   Cross-sectional study. SETTING:   Game statistics and injury reports over 3 NBA seasons (2012-2015). PATIENTS OR OTHER PARTICIPANTS:   Data represented 627 players (height = 200...
May 17, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29771138/rate-of-upper-extremity-injury-in-high-school-baseball-pitchers-who-played-catcher-as-a-secondary-position
#20
Elizabeth E Hibberd, Sakiko Oyama, Joseph B Myers
CONTEXT:   Many high school pitchers play another position after they have finished pitching for the day or on their rest days from pitching. Because of the cumulative demands on the arm, pitchers who also play catcher may have a greater risk of developing a throwing-related shoulder or elbow injury. OBJECTIVE:   To compare the rate of throwing-related upper extremity injuries between high school baseball pitchers who also played catcher as a secondary position and those who did not play catcher...
May 17, 2018: Journal of Athletic Training
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