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https://www.readbyqxmd.com/read/29237656/foot-strike-haemolysis-in-an-ultramarathon-runner
#1
Abid A Fazal, Mary S Whittemore, Katharine C DeGeorge
This case report describes mild anaemia and intravascular haemolysis in an otherwise healthy 41-year-old ultramarathon runner. In long-distance endurance athletes, trace gastrointestinal bleeding and plasma volume expansion are recognised sources of mild anaemia, often found incidentally. However, repetitive forceful foot striking can lead to blood cell lysis in the feet, resulting in a mild macrocytic anaemia and intravascular haemolysis, as was demonstrated in the patient described herein. Mild anaemia in runners, often called 'runner's pseudoanaemia', is typically clinically insignificant and does not require intervention...
December 13, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29228848/comparative-study-of-surgical-and-conservative-treatments-for-fifth-metatarsal-base-avulsion-fractures-type-i-in-young-adults-or-athletes
#2
Gen-Bin Wu, Bing Li, Yun-Feng Yang
PURPOSE: This study aimed to investigate the therapeutic effects and complications of minimally invasive surgery in treating displaced avulsion fractures (2-3 mm) of fifth metatarsal base zone I in young adults or athletes. METHODS: Forty-six patients with displaced fifth metatarsal base avulsion fractures were assigned to operative and nonoperative groups by randomization. Patients in nonoperative group were immobilized with plaster, while patients in operative group were treated with closed reduction and fixation with a percutaneous screw...
January 2018: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29228800/fifth-metatarsal-jones-fractures-in-the-athlete
#3
David A Porter
Fifth metatarsal fractures, otherwise known as "Jones" fractures, occur commonly in athletes and nonathletes alike. While recent occurrence in the popular elite athlete has increased public knowledge and interest in the fracture, this injury is common at all levels of sport. This review will focus on all three types of Jones fractures. The current standard for treatment is operative intervention with intramedullary screw fixation. Athletes typically report an acute episode of lateral foot pain, described as an ache...
December 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/29222948/force-coordination-strategies-in-on-water-single-sculling-are-asymmetries-related-to-better-rowing-performance
#4
John Warmenhoven, Richard Smith, Conny Draper, Andrew Harrison, Norma Bargary, Stephen Cobley
Asymmetries of the rowing stroke cycle have been assessed with reference to kinematics and foot-force measures in laboratory testing environments. It remains unclear how asymmetries in propulsive kinetic measures are related to on-water rowing performance. A new approach for the evaluation of both global and local asymmetries across the entire movement was used to assess the continuous role of asymmetries and whether these change according to level of competitive representation. Twenty seven highly skilled female rowers (national and international competition level), rowing at 32 strokes per minute in a single scull boat were evaluated...
December 9, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29209416/reliability-of-analysis-of-the-bone-mineral-density-of-the-second-and-fifth-metatarsals-using-dual-energy-x-ray-absorptiometry-dxa
#5
N Stewart Pritchard, James M Smoliga, Anh-Dung Nguyen, Micah C Branscomb, David R Sinacore, Jeffrey B Taylor, Kevin R Ford
Background: Metatarsal fractures, especially of the fifth metatarsal, are common injuries of the foot in a young athletic population, but the risk factors for this injury are not well understood. Dual-energy x-ray absorptiometry (DXA) provides reliable measures of regional bone mineral density to predict fracture risk in the hip and lumbar spine. Recently, sub-regional metatarsal reliability was established in fresh cadaveric specimens and associated with ultimate fracture force. The purpose of this study was to assess the reliability of DXA bone mineral density measurements of sub-regions of the second and fifth metatarsals in a young, active population...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/29189099/creative-prosthetic-foot-selection-enables-successful-ambulation-in-stiletto-high-heels
#6
Elizabeth Russell Esposito, Delbert H Lipe, Christopher A Rábago
BACKGROUND: Walking in high heels presents biomechanical challenges, yet they remain part of many women's attire. However, women with a lower limb amputation are limited in available footwear options. Case description and methods: This case study is in response to one patient's assertion that she walked better and more symmetrically in heels than flat shoes with her below-knee prosthesis. She underwent gait analysis in athletic shoes and 10-cm stiletto high heels worn with a pediatric running foot to determine if these claims could be substantiated through biomechanical measures...
November 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29181259/injury-patterns-in-adolescent-elite-endurance-athletes-participating-in-running-orienteering-and-cross-country-skiing
#7
Philip von Rosen, Frida Floström, Anna Frohm, Annette Heijne
Background: Prospective injury registration studies, monitoring adolescent elite athletes, are sparse in running, orienteering and cross-country skiing, yet essential for developing prevention programs. Purpose: The aims of this study were to describe the injury prevalence/incidence, severity grade, injury location, risk factors and the prevalence of illness in running (RU), orienteering (OR) and cross-country skiing athletes (CR). Study Design: Prospective cohort study...
October 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29177685/postural-stability-deficit-could-predict-ankle-sprains-a-systematic-review
#8
REVIEW
Alberto Grassi, Konstantinos Alexiou, Annunziato Amendola, Claude T Moorman, Kristian Samuelsson, Olufemi R Ayeni, Stefano Zaffagnini, Timothy Sell
PURPOSE: To perform a systematic review aimed to determine (1) if the postural stability deficit represents a risk factor for ankle sprains; (2) the most effective postural stability evaluation to predict ankle sprains and (3) eventual confounding factors that could influence postural stability and ankle sprain risk. METHODS: A systematic electronic search was performed in MEDLINE, EMBASE and CINAHL using the search terms (balance) OR (postural stability) matched with (lower limb) OR (ankle) OR (foot) and (sprain) OR (injury) on October 2 2017...
November 25, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29162768/coexistence-of-trunk-or-lower-extremity-pain-with-elbow-and-or-shoulder-pain-among-young-overhead-athletes-a-cross-sectional-study
#9
Takuya Sekiguchi, Yoshihiro Hagiwara, Haruki Momma, Masahiro Tsuchiya, Kaoru Kuroki, Kenji Kanazawa, Yutaka Yabe, Shinichiro Yoshida, Masashi Koide, Nobuyuki Itaya, Eiji Itoi, Ryoichi Nagatomi
Elbow or shoulder injuries are common in overhead sports. Because energy derived from the lower extremity passes through the trunk to the upper extremity in overhead motion, a break in such a kinetic chain could lead to arm injuries. However, there is only limited information about the role of the trunk and lower extremity support in preventing elbow or shoulder injuries. This study aimed to explore the association of trunk and lower extremity pain with elbow/shoulder pain among young overhead athletes. We conducted a cross-sectional study using self-reported questionnaires mailed to young athletes belonging to the Miyagi Amateur Sports Association...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29154263/the-effectiveness-of-proprioceptive-and-neuromuscular-training-compared-to-bracing-in-reducing-the-recurrence-rate-of-ankle-sprains-in-athletes-a-systematic-review-and-meta-analysis
#10
M Burger, D Dreyer, R L Fisher, D Foot, D H O'connor, M Galante, S Zalgaonkir
BACKGROUND: Ankle sprains are common musculoskeletal injuries in which the ligaments of the ankle partially or completely tear due to sudden stretching. OBJECTIVES: To critically appraise, evaluate and establish the best available evidence to determine the effectiveness of proprioceptive and neuromuscular training (PNT) compared to bracing in reducing the recurrence rate of ankle sprains in athletes. METHODOLOGY: The following seven databases were searched in June 2017: PubMed, Cochrane Library, PEDro, ScienceDirect, Scopus, SPORTDiscus, EBSCO Host: CINAHL...
November 10, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/29149063/estimating-stair-running-performance-using-inertial-sensors
#11
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/29145504/quantifying-performance-on-an-outdoor-agility-drill-using-foot-mounted-inertial-measurement-units
#12
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/29140180/the-role-of-lumbopelvic-hip-complex-stability-in-softball-throwing-mechanics
#13
Gabrielle G Gilmer, Jessica K Washington, Jeffrey Dugas, James Andrews, Gretchen D Oliver
CONTEXT: Studies have found that a 20% reduction in energy generation from the lumbopelvic-hip complex (LPHC) during overhead throws leads to a 34% increase in load on the shoulder. OBJECTIVE: The purpose of this study was to assess the effects of LPHC stability, via the single leg squat (SLS) assessment, on throwing mechanics of softball athletes. DESIGN: Prospective cohort study. SETTING: Laboratory setting. PARTICIPANTS: Fifty softball athletes (164...
November 15, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29140159/athletes-rated-as-poor-single-leg-squat-performers-display-measureable-differences-in-single-leg-squat-biomechanics-compared-to-good-performers
#14
Lachlan E Garrick, Bryce C Alexander, Anthony G Schache, Marcus G Pandy, Kay M Crossley, Natalie J Collins
CONTEXT: It is important to validate single-leg squat visual rating criteria used in clinical practice and research. Foot orthoses may improve single-leg squat performance in those who demonstrate biomechanics associated with increased risk of lower-limb injury. OBJECTIVE: Validate visual rating criteria proposed by Crossley et al, by determining whether athletes rated as poor single-leg squat performers display different single-leg squat biomechanics than good performers; and evaluate immediate effects of foot orthoses on single-leg squat biomechanics in poor performers...
November 15, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29111630/anthropometric-profile-of-combat-athletes-via-multivariate-analysis
#15
Anna Burdukiewicz, Jadwiga Pietraszewska, Aleksandra Stachoń, Justyna Andrzejewska
BACKGROUND: Athletic success is a complex phenotype influenced by multiple factors, from sport-specific skills to anthropometric characteristics. Considering the latter, the literature has repeatedly indicated that athletes possess distinct physical characteristics depending on the practiced discipline. The aim of the present study was to apply univariate and multivariate methods to assess a wide range of morphometric and somatotypic characteristics in male combat athletes. METHODS: Biometric data were obtained from 206 male university-level practitioners of judo, jiu-jitsu, karate, kickboxing, taekwondo, and wrestling...
November 7, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29106811/epidemiology-and-impact-on-performance-of-lower-extremity-stress-injuries-in-professional-basketball-players
#16
Moin Khan, Kim Madden, M Tyrrell Burrus, Joseph P Rogowski, Jeff Stotts, Marisa J Samani, Robby Sikka, Asheesh Bedi
BACKGROUND: Professional basketball players in the National Basketball Association (NBA) subject their lower extremities to significant repetitive loading during both regular-season and off-season training. Little is known about the incidence of lower extremity bony stress injuries and their impact on return to play and performance in these athletes. HYPOTHESIS: Stress injuries of the lower extremity will have significant impact on performance. STUDY DESIGN: Case series...
November 1, 2017: Sports Health
https://www.readbyqxmd.com/read/29091512/knee-frontal-plane-projection-angle-a-comparison-study-between-drop-vertical-jump-and-step-down-tests-with-young-volleyball-athletes
#17
Gabriel Andrade Paz, Marianna de Freitas Maia, Haroldo Gualter Santana, Humberto Miranda, Vicente Lima, John D Willson
STUDY DESIGN: Observational study. CONTEXT: Altered frontal plane knee mechanics during dynamic tasks have been often associated with lower extremity injuries. Strategies to decrease these risk factors and improve knee joint stability are often applied in rehabilitation and training environments. OBJECTIVE: The purpose of this study was to compare knee joint frontal plane projection angles (FPPA) via two dimensional (2D) video analysis during drop vertical jump (DVJ) and step-down test (SDT) tasks in the preferred and non-preferred limbs of young male and female volleyball players...
November 1, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29074288/strategy-quantification-using-body-worn-inertial-sensors-in-a-reactive-agility-task
#18
Chika U Eke, Stephen M Cain, Leia A Stirling
Agility performance is often evaluated using time-based metrics, which provide little information about which factors aid or limit success. The objective of this study was to better understand agility strategy by identifying biomechanical metrics that were sensitive to performance speed, which were calculated with data from an array of body-worn inertial sensors. Five metrics were defined (normalized number of foot contacts, stride length variance, arm swing variance, mean normalized stride frequency, and number of body rotations) that corresponded to agility terms defined by experts working in athletic, clinical, and military environments...
October 7, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29070955/patellofemoral-pain-in-athletes-clinical-perspectives
#19
REVIEW
Farzin Halabchi, Maryam Abolhasani, Maryam Mirshahi, Zahra Alizadeh
Patellofemoral pain (PFP) is a very common problem in athletes who participate in jumping, cutting and pivoting sports. Several risk factors may play a part in the pathogenesis of PFP. Overuse, trauma and intrinsic risk factors are particularly important among athletes. Physical examination has a key role in PFP diagnosis. Furthermore, common risk factors should be investigated, such as hip muscle dysfunction, poor core muscle endurance, muscular tightness, excessive foot pronation and patellar malalignment...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/29055245/biomechanical-analysis-of-an-interference-screw-and-a-novel-twist-lock-screw-design-for-bone-graft-fixation
#20
S Asnis, J Mullen, P D Asnis, N Sgaglione, T LaPorta, D A Grande, N O Chahine
BACKGROUND: Malpositioning of an anterior cruciate ligament graft during reconstruction can occur during screw fixation. The purpose of this study is to compare the fixation biomechanics of a conventional interference screw with a novel Twist Lock Screw, a rectangular shaped locking screw that is designed to address limitations of graft positioning and tensioning. METHODS: Synthetic bone (10, 15, 20lb per cubic foot) were used simulating soft, moderate, and dense cancellous bone...
October 10, 2017: Clinical Biomechanics
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