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Athlete, injury

Marie E Boo, J Craig Garrison, Joseph P Hannon, Kalyssa M Creed, Shiho Goto, Angellyn N Grondin, James M Bothwell
Background: Female patients are more likely to suffer a second anterior cruciate ligament (ACL) injury after ACL reconstruction (ACLR) and return to sport (RTS) compared with healthy female controls. Few studies have examined the energy absorption contribution (EAC) that could lead to this subsequent injury. Hypothesis: The ACLR group would demonstrate an altered EAC between joints (hip, knee, and ankle) but no difference in quadriceps, hip abduction, or hip external rotation (ER) strength at the time of RTS...
March 2018: Orthopaedic Journal of Sports Medicine
Damien J Lazar, Jonathan D Lichtenstein, David J Tybor
Background: Ultimate Frisbee (ultimate) is a fast-growing, popular sport played nationally by over 4 million athletes. While several studies have examined injury rates in ultimate, no work has investigated the prevalence of concussions specifically or players' knowledge and management of those injuries. Purpose: To estimate the lifetime prevalence of concussions in ultimate and to assess players' knowledge of concussions as well as their concussion management behaviors...
March 2018: Orthopaedic Journal of Sports Medicine
Joseph T Gamboa, Edward C Shin, Neil P Pathare, Patrick J McGahan, James L Chen
Anterior cruciate ligament (ACL) tears are an unfortunate and devastating injury in the athletic patient. Surgical reconstruction of the ACL with a taut graft construct is necessary to restore knee stability and help expedite the patient's return to an active lifestyle. Arthroscopy-assisted ACL reconstruction can be a technically involved procedure, where strong fixation limits graft motion to allow sufficient healing within the tibial and femoral tunnels at the bone-tendon interfaces. Loss of tension in a graft can cause symptomatic anterior or rotatory instability and potential retear of the ACL graft...
February 2018: Arthroscopy Techniques
Wilson Wai Shun Hau, Tun Hing Lui, Wai Kit Ngai
Post-traumatic peroneal tendon subluxation or dislocation is most commonly due to injury to the superior peroneal retinaculum. Acute repair of the retinaculum is an option for active athletes who desire quick return of sport activity. In general, conventional open surgeries require extensive exposure of the injured superficial peroneal retinaculum and have potential risks of scar formation, sural nerve injury, limited range of movement, peroneal tendon re-subluxation, and tendon irritation. The purpose of this Technical Note is to describe the details of endoscopic superior peroneal retinaculum reconstruction...
January 2018: Arthroscopy Techniques
William R Johnson, Ajmal Mian, Cyril J Donnelly, David Lloyd, Jacqueline Alderson
An understanding of athlete ground reaction forces and moments (GRF/Ms) facilitates the biomechanist's downstream calculation of net joint forces and moments, and associated injury risk. Historically, force platforms used to collect kinetic data are housed within laboratory settings and are not suitable for field-based installation. Given that Newton's Second Law clearly describes the relationship between a body's mass, acceleration, and resultant force, is it possible that marker-based motion capture can represent these parameters sufficiently enough to estimate GRF/Ms, and thereby minimize our reliance on surface embedded force platforms? Specifically, can we successfully use partial least squares (PLS) regression to learn the relationship between motion capture and GRF/Ms data? In total, we analyzed 11 PLS methods and achieved average correlation coefficients of 0...
March 17, 2018: Medical & Biological Engineering & Computing
Cindy Lin, Ellen Casey, Daniel Herman, Nicole Katz, Adam Tenforde
Common sports injuries include bone stress injuries (BSI), anterior cruciate ligament injuries (ACL), and concussions. Less commonly recognized are the specific sex differences in epidemiology, risk factors, and outcomes of these conditions by sex. An understanding of these factors can improve their clinical management, from prescribing appropriate prehabilitation to guiding post injury rehabilitation and return to play. This narrative review summarizes the sex differences in the diagnosis and management of BSI, ACL injuries, and concussions...
March 14, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
C Kajetanek, O Benoît, B Granger, F Menegaux, N Chereau, H Pascal-Mousselard, F Khiami
BACKGROUND: Surgery for athletic pubalgia usually consists in abdominal wall repair combined with routine bilateral adductor tenotomy. We currently confine the surgical procedure to the injured structure(s) (abdominal wall only, adductor tendon only, or both) to limit morbidity and expedite recovery. Outcomes of this à la carte approach are unclear. The objectives of this retrospective study were to determine the return to play (RTP) time, evaluate the potential influence of injury location, and assess the frequency of recurrence or contralateral involvement...
March 13, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
Roberto Schreiber, Cristiane M Souza, Layde R Paim, Guilherme de Rossi, José R Matos-Souza, Anselmo de A Costa E Silva, Fernando R Faria, Eliza R Azevedo, Karina C Alonso, Andrei C Sposito, Alberto Cliquet, José I Gorla, Wilson Nadruz
OBJECTIVE: To investigate the relationship of carotid intima-media thickness (IMT) and cardiac structure and function with adipocytokines in sedentary (S-SCI) and physically-active (PA-SCI) subjects with spinal cord injury (SCI). DESIGN: Cross-sectional observational study. SETTING: Academic medical center. PARTICIPANTS: Forty-one SCI men (16 S-SCI and 25 PA-SCI) with chronic (>1y) SCI were evaluated. S-SCI subjects did not perform labor that required physical effort, recreational physical activity or sports, while PA-SCI subjects included competing athletes that were regularly performing adapted sports...
March 13, 2018: Archives of Physical Medicine and Rehabilitation
Michael A Samaan, Stacie I Ringleb, Sebastian Y Bawab, Eric K Greska, Joshua T Weinhandl
The effects of ACL-reconstruction on lower extremity joint mechanics during performance of the Star Excursion Balance Test (SEBT) and Single Leg Hop (SLH) are limited. The purpose of this study was to determine if altered lower extremity mechanics occur during the SEBT and SLH after ACL-reconstruction. One female Division I collegiate athlete performed the SEBT and SLH tasks, bilaterally, both before ACL injury and 27 months after ACL-reconstruction. Maximal reach, hop distances, lower extremity joint kinematics and moments were compared between both time points...
March 15, 2018: Computer Methods in Biomechanics and Biomedical Engineering
Valentina Camomilla, Elena Bergamini, Silvia Fantozzi, Giuseppe Vannozzi
Recent technological developments have led to the production of inexpensive, non-invasive, miniature magneto-inertial sensors, ideal for obtaining sport performance measures during training or competition. This systematic review evaluates current evidence and the future potential of their use in sport performance evaluation. Articles published in English (April 2017) were searched in Web-of-Science, Scopus, Pubmed, and Sport-Discus databases. A keyword search of titles, abstracts and keywords which included studies using accelerometers, gyroscopes and/or magnetometers to analyse sport motor-tasks performed by athletes (excluding risk of injury, physical activity, and energy expenditure) resulted in 2040 papers...
March 15, 2018: Sensors
Chris Brogden, Kelly Marrin, Richard Page, Matt Greig
CONTEXT: Clinical and functional assessments are performed regularly in sporting environments to screen for performance deficits and injury risk. Circadian rhythms have been demonstrated to affect human performance, however the influence of time of day on a battery of multiple ankle injury risk factors has yet to be established within athletic populations. OBJECTIVES: To investigate the influence of circadian variation on a battery of tests, used to screen for ankle aetiological risk factors...
March 15, 2018: Journal of Sport Rehabilitation
Yasmine Mosleh, Martin Cajka, Bart Depreitere, Jos Vander Sloten, Jan Ivens
Oblique impact is the most common accident situation that occupants in traffic accidents or athletes in professional sports experience. During oblique impact, the human head is subjected to a combination of linear and rotational accelerations. Rotational movement is known to be responsible for traumatic brain injuries. In this article, composite foam with a column/matrix composite configuration is proposed for head protection applications to replace single-layer uniform foam, to better attenuate rotational movement of the head during oblique impacts...
March 1, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
Jahan Heidari, Jürgen Beckmann, Maurizio Bertollo, Michel Brink, Wolfgang Kallus, Claudio Robazza, Michael Kellmann
Monitoring of recovery in the context of athletic performance has gained significant importance during recent years. As a systematic process of data collection and evaluation, the monitoring of recovery can be implemented for various purposes. It may aid to prevent negative outcomes of training or competition, such as underrecovery, overtraining, or injuries. Further, it aims at establishing routines and strategies necessary to guarantee athletes' readiness for performance by restoring their depleted resources...
March 15, 2018: International Journal of Sports Physiology and Performance
Philip W Cameron, Noelle C Soltero, Justin Byers
Mild traumatic brain injuries (mTBIs) are common in contact sports. There is an association between mTBIs and altered motor function. BioSway technology measures individuals' balance using the Balance Error Scoring System (BESS). Prior to incorporating BESS testing in concussion protocol, other variables that influence the BESS test require review. The objective of this study is to determine if game fatigue in hockey players also influences the BESS score. 23 male (21.08 ± 1.09) National Collegiate Athletic Association (NCAA) athletes were tested using the BioSway™ (Biodex, USA)...
2018: International Journal of Exercise Science
JongEun Yim, Jerrold Petrofsky, Haneul Lee
Ankle and foot injuries are common among athletes and physically active individuals. The most common residual disability, ankle sprain, is characterized by instability along with postural sway. If the supporting structures around a joint become lax, posture stability and balance are also affected. Previous studies have examined muscle stiffness and elasticity and postural sway separately; however, the relationship between these factors is yet unknown. It is well known that the levels of sex hormones, especially estrogen, change in women over the phase of the menstrual cycle...
2018: Tohoku Journal of Experimental Medicine
Molly K Lewis, Omar Ramos-Williams, Hasan M Syed, Theodore K Gregorius
CASE: A 9-year-old boy sustained intrasubstance tears of the rotator cuff and periscapular muscles due to a fall, resulting in scapular winging and severely decreased shoulder range of motion. Treatment consisted of a modified thoracolumbosacral orthosis (TLSO) with a shoulder immobilizer attachment (to reduce the scapula to the thoracic wall and hold the arm in 10° of abduction). The brace was worn for 8 weeks. The patient recovered full, pain-free shoulder function and range of motion, and returned to high-level athletics...
March 14, 2018: JBJS Case Connector
Dayanne S Lima-Borges, Paula F Martinez, Luiz Carlos M Vanderlei, Fernando S S Barbosa, Silvio A Oliveira-Junior
OBJECTIVES: Young athletes' participation in competitive sports is becoming increasingly common, and this increased involvement raises concerns about the occurrence of overtraining and sports injuries. Since these issues are poorly understood, this study analyzed heart rate variability, stress/recovery relationship, and sports injury incidence during a training macrocycle of young sprint and endurance swimmers. METHODS: Thirty teenage swimmers (aged 12 to 17 years) were divided into two groups as follows: Sprint (n=17) and Endurance (n=13)...
March 14, 2018: Physician and Sportsmedicine
Emanuele D'Artibale, Paul B Laursen, John B Cronin
Performance in motorcycle road racing is typically considered as the summation of interactions between rider, motorcycle, tires, and environment. Despite the substantial investments made towards the development of motorcycle technology and the business interests of manufacturers, published research focusing on the riders is relatively sparse, and a bike-centered mentality tends to dominate the sport. This manuscript reviews the known human performance aspects of motorcycle road racing and suggests directions for future research...
March 13, 2018: Sports Medicine
Alireza Esmaeili, Andrew M Stewart, William G Hopkins, George P Elias, Brendan H Lazarus, Amber E Rowell, Robert J Aughey
Aim: The sit and reach test (S&R), dorsiflexion lunge test (DLT), and adductor squeeze test (AST) are commonly used in weekly musculoskeletal screening for athlete monitoring and injury prevention purposes. The aim of this study was to determine the normal week to week variability of the test scores, individual differences in variability, and the effects of training load on the scores. Methods: Forty-four elite Australian rules footballers from one club completed the weekly screening tests on day 2 or 3 post-main training (pre-season) or post-match (in-season) over a 10 month season...
2018: Frontiers in Physiology
Roger Fielding, Linda Riede, James P Lugo, Aouatef Bellamine
Given its pivotal role in fatty acid oxidation and energy metabolism, l-carnitine has been investigated as ergogenic aid for enhancing exercise capacity in the healthy athletic population. Early research indicates its beneficial effects on acute physical performance, such as increased maximum oxygen consumption and higher power output. Later studies point to the positive impact of dietary supplementation with l-carnitine on the recovery process after exercise. It is demonstrated that l-carnitine alleviates muscle injury and reduces markers of cellular damage and free radical formation accompanied by attenuation of muscle soreness...
March 13, 2018: Nutrients
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