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International Journal of Sports Medicine

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https://www.readbyqxmd.com/read/28738428/association-between-patient-history-and-physical-examination-and-osteoarthritis-after-ankle-sprain
#1
John M van Ochten, Anja D de Vries, Nienke van Putte, Edwin H G Oei, Patrick J E Bindels, Sita M A Bierma-Zeinstra, Marienke van Middelkoop
Structural abnormalities on MRI are frequent after an ankle sprain. To determine the association between patient history, physical examination and early osteoarthritis (OA) in patients after a previous ankle sprain, 98 patients with persistent complaints were selected from a cross-sectional study. Patient history taking and physical examination were applied and MRI was taken. Univariate and multivariable analyses were used to test possible associations. Signs of OA (cartilage loss, osteophytes and bone marrow edema) were seen in the talocrural joint (TCJ) in 40% and the talonavicular joint (TNJ) in 49%...
July 24, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704886/tensiomyographic-assessment-of-muscle-contractile-properties-in-9-to-14-year-old-children
#2
Bostjan Simunic, Hans Degens, Jernej Zavrsnik, Katja Koren, Tadeja Volmut, Rado Pisot
While there are numerous data on the skeletal muscle fiber type composition in adults, little is known about the changes in fiber type composition and contractile properties during maturational growth in children. Using noninvasive tensiomyography, we measured contraction time (Tc), an indirect estimate of the myosin heavy chain I (MHC-I) proportion, to assess the longitudinal changes of the biceps brachii (BB), biceps femois (BF), vastus lateralis (VL), and erector spinae (ES) muscles in 53 boys and 54 girls...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704885/submaximal-markers-of-fatigue-and-overreaching-implications-for-monitoring-athletes
#3
André Siegl, Elisa M Kösel, Nicholas Tam, Susanne Koschnick, Nelleke G Langerak, Sabrina Skorski, Tim Meyer, Robert P Lamberts
The regular monitoring of athletes is important to fine-tune training and detect early symptoms of overreaching. Therefore the aim of this study was to determine if a noninvasive submaximal running test could reflect a state of overreaching. 14 trained runners completed a noninvasive Lamberts Submaximal Running Test, one week before and 2 days after finishing an ultramarathon, and delayed onset of muscle soreness and the daily analysis of life demands for athletes questionnaire were also captured. After the ultramarathon, submaximal heart rate was lower at 70% (-3 beats) and 85% of peak treadmill running speed (P<0...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704884/prone-hip-extension-muscle-recruitment-is-associated-with-hamstring-injury-risk-in-amateur-soccer
#4
Joke Schuermans, Damien Van Tiggelen, Erik Witvrouw
'Core stability' is considered essential in rehabilitation and prevention. Particularly with respect to hamstring injury prevention, assessment and training of lumbo-pelvic control is thought to be key. However, supporting scientific evidence is lacking. To explore the importance of proximal neuromuscular function with regard to hamstring injury susceptibility, this study investigated the association between the Prone Hip Extension (PHE) muscle activation pattern and hamstring injury incidence in amateur soccer players...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704883/validity-and-reliability-of-a-new-device-wimu%C3%A2-for-measuring-hamstring-muscle-extensibility
#5
José M Muyor
The aims of the current study were 1) to evaluate the validity of the WIMU(®) system for measuring hamstring muscle extensibility in the passive straight leg raise (PSLR) test using an inclinometer for the criterion and 2) to determine the test-retest reliability of the WIMU(®) system to measure hamstring muscle extensibility during the PSLR test. 55 subjects were evaluated on 2 separate occasions. Data from a Unilever inclinometer and WIMU(®) system were collected simultaneously. Intraclass correlation coefficients (ICCs) for the validity were very high (0...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704882/neuromuscular-adaptations-to-combined-strength-and-endurance-training-order-and-time-of-day
#6
Maria Küüsmaa-Schildt, Daniela Eklund, Janne Avela, Tuomas Rytkönen, Robert Newton, Mikel Izquierdo, Keijo Häkkinen
The present study examined the effects of 24 weeks of morning vs. evening same-session combined strength (S) and endurance (E) training on neuromuscular and endurance performance. Fifty-one men were assigned to the morning (m) or evening (e) training group, where S preceded E or vice versa (SEm, ESm, SEe and ESe), or to the control group. Isometric force, voluntary activation, EMG and peak wattage during the maximal cycling test were measured. Training time did not significantly affect the adaptations. Therefore, data are presented for SEm+e (SEm+SEe) and ESm+e (ESm+ESe)...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704881/cardiovascular-and-autonomic-responses-to-a-maximal-exercise-test-in-elite-youngsters
#7
Cristina Blasco-Lafarga, Borja Camarena, Manuel Mateo-March
To analyze cardiovascular and autonomic responses in elite youngsters, 13 male cyclists (15.43±0.51 years) performed a graded-test until voluntary exhaustion. Oxygen consumption (VO2), blood lactate (BLa), arterial oxygen saturation (SaO2), respiratory exchange ratio (RER) and rating of perceived exertion (RPE) were collected, while heart rate (HR) was registered for heart rate variability (HRV) analyses, looking for linear and nonlinear comparisons. Cyclists reached maximal exertion [RPE: 19.14±0.94; BLa: 8...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704880/left-ventricular-adaptation-to-12-weeks-of-indoor-cycling-at-the-gym-in-untrained-females
#8
Kristofer Hedman, Niclas Bjarnegård, Toste Länne
Cross-sectional studies provide evidence of larger cardiac dimensions and mass in endurance trained than in untrained females. Much less is known regarding adaptations in cardiac function following training in untrained subjects. We aimed to study left ventricular (LV) adaptation to indoor cycling in previously untrained females, in regard of LV dimensions, mass and function. 42 sedentary females were divided into 2 equally sized groups, either training indoor cycling at regular classes at a local gym for 12 weeks, in average 2...
July 13, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28709167/sports-medicine-international-open-recently-published
#9
(no author information available yet)
No abstract text is available yet for this article.
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704878/evaluation-of-risk-in-research-must-be-judged-on-evidence-not-personal-opinion
#10
L A Jenkins, A R Mauger, J G Hopker
No abstract text is available yet for this article.
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28704877/safety-concerns-regarding-article-reliability-and-validity-of-a-self-paced-cardiopulmonary-exercise-test-in-post-mi-patients-l-a-jenkins-a-mauger-j-fisher-j-hopker-int-j-sports-med-2017-38-300-306
#11
S E Selig, G A V Borg, W Runciman, A La Gerche, K Davison, J Coquart, R G Eston
No abstract text is available yet for this article.
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28651256/the-cardiovascular-and-perceptual-response-to-very-low-load-blood-flow-restricted-exercise
#12
Matthew B Jessee, Scott J Dankel, Samuel L Buckner, J Grant Mouser, Kevin T Mattocks, Jeremy P Loenneke
This study sought to compare cardiovascular and perceptual responses to blood flow restriction (BFR) exercise using various pressure and load combinations. Fourteen participants completed four sets of BFR elbow flexion using 10, 15 and 20% 1RM with 40 and 80% arterial occlusion pressure (AOP). AOP was measured before and after exercise. Perceived exertion (RPE) and discomfort were assessed before exercise and after each set. Data presented as mean (95% CI), except for RPE and discomfort: 25(th), 50(th), 75(th) percentiles...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28625016/brugada-syndrome-and-exercise-practice-current-knowledge-shortcomings-and-open-questions
#13
Giuseppe Mascia, Elena Arbelo, Jaime Hernández Ojeda, Francesco Solimene, Ramon Brugada, Josep Brugada
Since its recognition as a clinical entity in 1992, the Brugada Syndrome (BrS), a hereditary disease characterized by a typical electrocardiogram (ECG) pattern potentially predisposing to sudden cardiac death (SCD), has attracted the attention of many physicians for its circadian pattern of ventricular arrhythmias (VA), mostly occurring at rest. Exercise may potentially worsen the ECG abnormalities in BrS patients, resulting in higher peak J-point amplitudes during the vasovagal reaction of the recovery period, possibly leading to an increased risk of cardiac events...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28575923/the-effect-of-a-simulated-soccer-match-on-anterior-cruciate-ligament-injury-risk-factors
#14
Matthew Wright, Paul Chesterton, Mark Wijnbergen, Adrian O'Rourke, Tom Macpherson
To investigate the effect of within match fatigue on knee kinematics and jump kinetics in girls' soccer players, a quasi-experiment time series design was employed collecting data before, after and at 15-min intervals during a 90-min simulated soccer match. 15 girl players (age 13.1±1.4 years) performed a counter movement jump and a single-leg drop jump. Mean concentric force and flight time to contraction time ratio were derived from the counter movement jump. Knee valgus and flexion angles were calculated during the single-leg drop from 3-dimensional motion capture...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28575922/comparison-of-specific-prediction-equations-to-estimate-peak-oxygen-uptake-in-obese-women
#15
Ghazi Racil, Christine Lemaire, Alain-Eric Dubart, David Debeaumont, Ingrid Castres, Jérémy B Coquart
The aim of the current study was to compare 2 equations to predict peak oxygen uptake (V̇O2peak) in obese women, according to their obesity class. 92 maximal cardiopulmonary exercise testing sets (CPET with initial and subsequent increments set to achieve an exercise duration between 8-12 min) were retrospectively analysed. These CPET were divided into 3 groups according to the women body mass indexes (BMI): class 1 (30 kg.m(-2)≤BMI<35 kg.m(-2), n=22), class 2 (35 kg.m(-2)≤BMI<40 kg.m(-2), n=36) or class 3 (BMI≥40 kg...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28575921/endurance-exercise-in-hypoxia-hyperoxia-and-normoxia-mitochondrial-and-global-adaptations
#16
Axel Przyklenk, Boris Gutmann, Thorsten Schiffer, Wildor Hollmann, Heiko K Strueder, Wilhelm Bloch, Andreas Mierau, Sebastian Gehlert
We hypothesized short-term endurance exercise (EN) in hypoxia (HY) to exert decreased mitochondrial adaptation, peak oxygen consumption (VO2peak) and peak power output (PPO) compared to EN in normoxia (NOR) and hyperoxia (PER). 11 male subjects performed repeated unipedal cycling EN in HY, PER, and NOR over 4 weeks in a cross-over design. VO2peak, PPO, rate of perceived exertion (RPE) and blood lactate (Bla) were determined pre- and post-intervention to assess physiological demands and adaptation. Skeletal muscle biopsies were collected to determine molecular mitochondrial signaling and adaptation...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28564745/cardiorespiratory-responses-of-adults-and-children-during-normoxic-and-hypoxic-exercise
#17
Jernej Kapus, Igor B Mekjavic, Adam C McDonnell, Anton Ušaj, Janez Vodičar, Peter Najdenov, Miroljub Jakovljević, Polona Jaki Mekjavić, Milan Žvan, Tadej Debevec
We aimed to elucidate potential differential effects of hypoxia on cardiorespiratory responses during submaximal cycling and simulated skiing exercise between adults and pre-pubertal children. Healthy, low-altitude residents (adults, N=13, Age=40±4yrs.; children, N=13, age=8±2yrs.) were tested in normoxia (Nor: PiO2=134±0.4 mmHg; 940 m) and normobaric hypoxia (Hyp: PiO2=105±0.6 mmHg; ~3 000 m) following an overnight hypoxic acclimation (≥12-hrs). On both days, the participants underwent a graded cycling test and a simulated skiing protocol...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28564744/locomotion-mode-affects-the-physiological-strain-during-exercise-at-walk-run-transition-speed-inelderly-men
#18
Raul Freire, Paulo Farinatti, Felipe Cunha, Brenno Silva, Walace Monteiro
This study investigated cardiorespiratory responses and rating of perceived exertion (RPE) during prolonged walking and running exercise performed at the walk-run transition speed (WRTS) in untrained healthy elderly men. 20 volunteers (mean±SE, age: 68.4±1.2 yrs; height: 170.0±0.02 cm; body mass: 74.7±2.3 kg) performed the following bouts of exercise: a) maximal cardiopulmonary exercise test (CPET); b) specific protocol to detect WRTS; and c) two 30-min walking and running bouts at WRTS. Expired gases were collected during exercise bouts via the Ultima CardiO2 metabolic analyzer...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28564743/forced-retirement-from-professional-rugby-union-is-associated-with-symptoms-of-distress
#19
James Craig Brown, Gino Kerkhoffs, Mike I Lambert, Vincent Gouttebarge
Rugby has a higher injury burden than other popular sports, such as football. Athletes who are forced to retire as a result of injury are associated with poor mental health. With its high injury burden, professional rugby players might be at risk of mental health conditions associated with injury-related forced retirement. This study aimed to compare mental health between former professional rugby players who were and weren't forced to retire. A questionnaire including the 4DSQ (distress), GHQ-12 (anxiety/depression), PROMIS short-form (sleep disturbance) and AUDIT-C (alcohol misuse) was completed by retired professional players from Ireland, France and South Africa...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28564742/prophylactic-bracing-has-no-effect-on-lower-extremity-alignment-or-functional-performance
#20
Garrett A Hueber, Emily A Hall, Brad W Sage, Carrie L Docherty
Prophylactic ankle bracing is commonly used during physical activity. Understanding how bracing affects body mechanics is critically important when discussing both injury prevention and sport performance. The purpose is to determine if ankle bracing affects lower extremity mechanics during the Landing Error Scoring System test (LESS) and Sage Sway Index (SSI). Thirty physically active participants volunteered for this study. Participants completed the LESS and SSI in both a braced and unsupported conditions...
July 2017: International Journal of Sports Medicine
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