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Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine

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https://www.readbyqxmd.com/read/28901963/underlying-chronic-disease-medication-use-history-of-running-injuries-and-being-a-more-experienced-runner-are-independent-factors-associated-with-exercise-associated-muscle-cramping-a-cross-sectional-study-in-15778-distance-runners
#1
Martin P Schwellnus, Sonja Swanevelder, Esme Jordaan, Wayne Derman, Dina C Janse Van Rensburg
BACKGROUND: Exercise-associated muscle cramping (EAMC) is a significant medical complication in distance runners, yet factors associated with EAMC are poorly documented. OBJECTIVE: To document risk factors associated with EAMC in runners. DESIGN: Cross-sectional study. SETTING: Two ocean races (21.1 km, and 56 km). PARTICIPANTS: Fifteen thousand seven hundred seventy-eight race entrants. METHODS: Participants completed a prerace medical history screening tool including: training, cardiovascular disease (CVD), risk factors for, and symptoms of CVD, history of diseases affecting major organ systems, cancer, allergies, medication use, and running injury...
August 18, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28827500/in-response-to-googling-concussion-care
#2
Cameron M Marshall
No abstract text is available yet for this article.
August 17, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28827499/intrarater-reliability-of-muscle-strength-and-hamstring-to-quadriceps-strength-imbalance-ratios-during-concentric-isometric-and-eccentric-maximal-voluntary-contractions-using-the-isoforce-dynamometer
#3
Anett Mau-Moeller, Martin Gube, Sabine Felser, Frank Feldhege, Matthias Weippert, Florian Husmann, Thomas Tischer, Rainer Bader, Sven Bruhn, Martin Behrens
OBJECTIVE: To determine intrasession and intersession reliability of strength measurements and hamstrings to quadriceps strength imbalance ratios (H/Q ratios) using the new isoforce dynamometer. DESIGN: Repeated measures. SETTING: Exercise science laboratory. PARTICIPANTS: Thirty healthy subjects (15 females, 15 males, 27.8 years). MAIN OUTCOME MEASURES: Coefficient of variation (CV) and intraclass correlation coefficients (ICC) were calculated for (1) strength parameters, that is peak torque, mean work, and mean power for concentric and eccentric maximal voluntary contractions; isometric maximal voluntary torque (IMVT); rate of torque development (RTD), and (2) H/Q ratios, that is conventional concentric, eccentric, and isometric H/Q ratios (Hcon/Qcon at 60 deg/s, 120 deg/s, and 180 deg/s, Hecc/Qecc at -60 deg/s and Hiso/Qiso) and functional eccentric antagonist to concentric agonist H/Q ratios (Hecc/Qcon and Hcon/Qecc)...
August 17, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817414/systematic-selection-of-key-logistic-regression-variables-for-risk-prediction-analyses-a-five-factor-maximum-model
#4
Timothy E Hewett, Kate E Webster, Wendy J Hurd
GENERAL AND CRITICAL REVIEW FORMAT: The evolution of clinical practice and medical technology has yielded an increasing number of clinical measures and tests to assess a patient's progression and return to sport readiness after injury. The plethora of available tests may be burdensome to clinicians in the absence of evidence that demonstrates the utility of a given measurement. OBJECTIVE: Thus, there is a critical need to identify a discrete number of metrics to capture during clinical assessment to effectively and concisely guide patient care...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817413/actn3-r577x-polymorphism-is-associated-with-the-incidence-and-severity-of-injuries-in-professional-football-players
#5
Massidda Myosotis, Voisin Sarah, Culigioni Claudia, Piras Francesco, Cugia Paolo, Yan Xu, Eynon Nir, Carla M Calò
OBJECTIVE: The ACTN3 R577X gene variant results in the absence of the α-actinin-3 protein in ∼18% of humans worldwide and has been associated with athletic performance and increased susceptibility to eccentric muscle damage. The aim of this study was to investigate the association between ACTN3 R577X variant and indirect muscle disorders/injuries in professional football players. DESIGN: A case-control, genotype-phenotype association study. INTERVENTION: Two hundred fifty-seven male professional Italian football players (from Serie A, Primavera, Allievi, and Giovanissimi; age = 21...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817412/effect-of-physical-methods-of-lymphatic-drainage-on-postexercise-recovery-of-mixed-martial-arts-athletes
#6
Aleksandra Zebrowska, Robert Trybulski, Robert Roczniok, Wieslaw Marcol
OBJECTIVE: Physical methods are reported to be important for accelerating skeletal muscle regeneration, decreasing muscle soreness, and shortening of the recovery time. The aim of the study was to assess the effect of the physical methods of lymphatic drainage (PMLD) such as manual lymphatic drainage (MLD), the Bodyflow (BF) therapy, and lymphatic drainage by deep oscillation (DO) on postexercise regeneration of the forearm muscles of mixed martial arts (MMA) athletes. DESIGN AND METHODS: Eighty MMA athletes aged 27...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817411/effects-of-recent-concussion-and-injury-history-on-instantaneous-relative-risk-of-lower-extremity-injury-in-division-i-collegiate-athletes
#7
Peter C Fino, Lauren N Becker, Nora F Fino, Brett Griesemer, Michael Goforth, Per Gunnar Brolinson
BACKGROUND: Growing evidence suggests that concussion increases the risk of lower extremity (LE) musculoskeletal injury. However, it is unclear to how the effect of concussion on LE injury risk may be influenced by previous injuries. This study sought to examine the association between concussion, previous LE injuries, and the risk LE injury to the same previously injured limb (ipsilateral) or the opposite limb (contralateral). METHODS: This retrospective study examined medical records from 110 concussed athletes and 110 matched controls for LE injuries in the 365 days before and after the concussion event...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817410/fatty-infiltrate-of-the-lumbar-multifidus-muscles-predicts-return-to-play-in-young-athletes-with-extension-based-low-back-pain
#8
John Winslow, Andrew Getzin, Hilary Greenberger, Walter Silbert
OBJECTIVE: To evaluate the predictive value of fatty infiltrate of the lumbar multifidus muscles (LMM) for return to play in young athletes with extension-based low back pain (EB LBP). DESIGN: Retrospective cohort study. SETTING: Hospital-based sports medicine practice. PATIENTS: Sixty-two athletes, 61.3% female, and 38.7% male, mean age 14.8 years, with a primary complaint of EB LBP who underwent magnetic resonance imaging (MRI); 46...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817409/trest-as-a-new-diagnostic-variable-for-chronic-exertional-compartment-syndrome-of-the-forearm-a-prospective-cohort-analysis-of-124-athletes
#9
Sergi Barrera-Ochoa, Eva Correa-Vazquez, Irene Gallardo-Calero, Sleiman Haddad, Andrea Sallent, Francisco Soldado, David Campillo-Recio, Xavier Mir-Bullo
OBJECTIVES: To measure the accuracy of currently used intracompartmental pressure (ICP) diagnostic variables for forearm chronic exertional compartment syndrome (CECS) and a new ICP diagnostic variable, TRest, the recovery time between the maximum ICP and return to resting pressure. DESIGN: Retrospective cohort. Level evidence IV. SETTING: University-affiliated tertiary hospital. PARTICIPANTS: Patients with suspected forearm CECS, 1990 to 2014...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817408/reactive-osteochondromatous-lesion-of-the-femoral-neck-in-a-highly-active-preadolescent-patient-is-this-the-pathogenesis-of-a-cam-deformity
#10
Yoko Matsuda, Naomi Kobayashi, Yutaka Inaba, So Kubota, Yohei Yukizawa, Hyonmin Choe, Ikuma Kato, Kenichi Ohashi, Tomoyuki Saito
Here, we present a rare case of a preadolescent boy with a prominent bony bump on the femoral neck. The main histological feature was concordant with a reactive osteochondromatous lesion possibly induced by repetitive microtrauma, probably because of overtraining as a soccer goalkeeper. The nature of this pathological change is consistent with the growth of a cam deformity. Especially in the preadolescent age group, we should note that repetitive use of the same joint kinematics may induce a prominent cam deformity...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28817407/nonoperative-management-of-labral-tears-of-the-hip-in-adolescent-athletes-description-of-sports-participation-interventions-comorbidity-and-outcomes
#11
Andrea Cianci, Dai Sugimoto, Andrea Stracciolini, Yi-Meng Yen, Mininder S Kocher, Pierre A dʼHemecourt
CONTEXT: Hip injury among young athletes is increasing, especially hip labral tears. Some tears may require surgical intervention, especially if they are associated with boney pathology such as femoroacetabular impingement (FAI). A protocol for nonoperative treatment of the hip labral tears is not well established. OBJECTIVE: To identify current nonoperative treatment options, comorbidities, sports participation, and outcomes of adolescent athletes who were diagnosed with hip labral tears...
August 16, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28767469/marijuana-and-its-effects-on-athletic-performance-a-systematic-review
#12
Kien V Trinh, Dion Diep, Hannah Robson
OBJECTIVE: To determine the effects of marijuana on athletic performance. DESIGN: We searched MEDLINE, EMBASE, CINAHL, PsycINFO, AMED, and SPORTDiscus from their beginning to September 2016. Study quality was assessed using the Cochrane collaboration tool for assessing risk of bias and the Cochrane GRADE scale. No meta-analyses were performed for this review. SETTING: Subjects in a track, gym, or recreational ward. PARTICIPANTS: Any primary study which included male and female adults of any athletic background between ages 18 and 65, with no other comorbid conditions...
July 27, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28742616/twenty-year-systematic-review-of-the-hip-pathology-risk-factors-treatment-and-clinical-outcomes-in-artistic-athletes-dancers-figure-skaters-and-gymnasts
#13
Ioanna Bolia, Hajime Utsunomiya, Renato Locks, Karen Briggs, Marc J Philippon
OBJECTIVE: To identify (1) the predominant level of evidence of the clinical studies regarding the hip pathology, risk factors, treatment, and clinical outcomes in artistic athletes (dancers, figure skaters, and gymnasts) (2) the most commonly reported hip pathology, risk factors, treatments, and clinical outcomes in dancers, figure skaters, and gymnasts. METHODS: To conduct this systematic review PubMed, EMBASE, and Scopus databases were searched for relevant studies and pertinent data were collected from the eligible articles...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28742615/trunk-side-strain-has-a-high-incidence-in-first-class-cricket-fast-bowlers-in-australia-and-england
#14
Andrew R Nealon, Jill L Cook
OBJECTIVE: To investigate the past incidence of side strain injury and its associated factors in first-class cricket fast bowlers in Australia and England. DESIGN: Retrospective case series. SETTING: Professional cricket. PARTICIPANTS: Cricket fast bowlers who were professionally contracted full time at first-class level in Australia and England in 2011. All bowlers were male and aged 18 or older. A bowler was defined as a fast bowler if the wicketkeeper would take their stance back from the stumps...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28742614/compression-socks-worn-during-flight-and-hemostatic-balance-in-boston-marathon-runners-on-oral-contraceptives
#15
Beth A Taylor, Amanda L Zaleski, Kevin D Ballard, Gregory A Panza, Antonio B Fernandez, Lauren Corso, Linda S Pescatello, Aaron L Baggish, Christopher Troyanos, Paul D Thompson
OBJECTIVE: To investigate the effect of oral contraceptive (OC) use and compression socks on hemostatic activation in women flying cross-country to and from a marathon. DESIGN: Prospective study. SETTING: 2015 Boston Marathon. PARTICIPANTS: Women were divided into non-OC using (CONTROL; n = 12), OC-using (OC; n = 15), and OC-using plus compression sock (OC + SOCK; n = 14) groups. INTERVENTION: Women in OC + SOCK wore compression socks during flights to and from the marathon...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28742613/the-influence-of-heavier-football-helmet-faceguards-on-head-impact-location-and-severity
#16
Julianne D Schmidt, Tracy T Phan, Ron W Courson, Fred Reifsteck, Eric D Merritt, Cathleen N Brown
OBJECTIVE: To determine whether players with heavier faceguards have increased odds of sustaining top of the head impacts and head impacts of higher severity. DESIGN: Cohort study. SETTING: On-field. PARTICIPANTS: Thirty-five division I collegiate football players. INTERVENTIONS: Faceguard mass was measured. Head impact location and severity (linear acceleration [gravity], rotational acceleration [radian per square second], and Head Impact Technology severity profile [unitless]) were captured for 19 379 total head impacts at practices using the Head Impact Telemetry System...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28742612/short-sleep-and-adolescents-performance-on-a-concussion-assessment-battery-an-experimental-sleep-manipulation-study
#17
Dean W Beebe, Scott W Powers, Eric W Slattery, Paul J Gubanich
OBJECTIVE: Correlational studies have linked short sleep to adolescents' report of postconcussion symptoms and cognitive performance during concussion assessments. This study tested whether those are cause-effect relationships. DESIGN: Three-week randomly counterbalanced, within-subjects, crossover experiment. SETTING: Adolescents slept at home with weekly visits to an outpatient clinic for sleep monitor uploads and outcome assessments. PARTICIPANTS: Twenty-four healthy 14- to 17...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28742611/a-rare-presentation-of-a-morel-lavallee-lesion-of-the-lower-leg-successfully-treated-with-ultrasound-guided-aspiration
#18
Audrey Falconi, Holly Crellin, Chelsea Tagawa
A Morel-Lavallee lesion (MLL) is a relatively rare condition that is caused by a traumatic shearing force. This force leads to a closed degloving injury of the subcutaneous tissue and fascia that creates a potential space that can fill with lymph, blood, and necrotic fat. The MLLs are traditionally seen after high impact trauma and typically located at the greater trochanter and pelvis, although recent reports have found them to be located at the knee, thigh, and lower leg. The MLLs typically present as swelling at the site of injury, which can be difficult to differentiate from several other diagnoses...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28742610/near-point-of-convergence-and-gait-deficits-in-adolescents-after-sport-related-concussion
#19
David R Howell, Michael J OʼBrien, Aparna Raghuram, Ankoor S Shah, William P Meehan
OBJECTIVE: To prospectively examine gait characteristics of participants acutely after concussion with and without receded near point of convergence (NPC), compared with healthy controls. DESIGN: Cross-sectional study. SETTING: Sports-medicine clinic. PARTICIPANTS: Patients examined after concussion (n = 33; mean ± SD = 7.2 ± 3.1 days) and a group of uninjured athletes (n = 31) completed a Postconcussion Symptom Scale, underwent NPC testing, and single/dual-task gait assessments...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28742609/the-efficacy-of-dynamic-contract-relax-stretching-on-delayed-onset-muscle-soreness-among-healthy-individuals-a-randomized-clinical-trial
#20
Yanfei Xie, Beibei Feng, Kedi Chen, Lars L Andersen, Phil Page, Yuling Wang
OBJECTIVE: To evaluate the efficacy of dynamic contract-relax stretching on delayed-onset muscle soreness (DOMS) in the calf muscle of healthy individuals. DESIGN: Randomized clinical trial. SETTING: Research laboratory. PARTICIPANTS: Three groups of 16 healthy participants (n = 48) were recruited by convenience sampling. INTERVENTIONS: Three sets of resisted bilateral heel-raising exercises until exhaustion were conducted to initiate DOMS...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
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