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Scandinavian Journal of Medicine & Science in Sports

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https://www.readbyqxmd.com/read/28211600/feasibility-of-early-physical-therapy-for-dizziness-after-a-sports-related-concussion-a-randomized-clinical-trial
#1
J C Reneker, A Hassen, R S Phillips, M C Moughiman, M Donaldson, J Moughiman
The purpose of this study was to (a) assess the feasibility of recruitment/retention of participants, protocol/resource management, and participant safety, and (b) estimate the size of the effect between the experimental and control groups. This was a feasibility study conducted as a prospective pilot double-blind randomized clinical trial. Subjects aged 10-23 years old with acute concussion and dizziness were enrolled from sports medicine centers. Forty-one participants were randomized into treatment and were seen for physical therapy beginning at 10 days post-concussion...
February 17, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28207979/a-comparison-of-injuries-in-elite-male-and-female-football-players-a-5-season-prospective-study
#2
Jon Larruskain, Jose A Lekue, Nerea Diaz, Adrian Odriozola, Susana M Gil
The aim was to compare the epidemiology of injuries between elite male and female football players from the same club. Injuries and individual exposure time in a male team and a female team, both playing in the Spanish first division, were prospectively recorded by the club's medical staff for five seasons (2010-2015) following the FIFA consensus statement. Total, training and match exposure hours per player-season were 20% higher for men compared to women (P < 0.01). Total, training and match injury incidence were 30-40% higher in men (P ≤ 0...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28207976/does-increased-physical-activity-in-school-affect-children-s-executive-function-and-aerobic-fitness
#3
Silje Eikanger Kvalø, Edvin Bru, Kolbjørn Brønnick, Sindre M Dyrstad
This study seeks to explore if increased PA in school affects children's executive function and aerobic fitness. The "Active school" study was a 10-month randomized controlled trial. The sample included 449 children (10-11 years old) in five intervention and four control schools. The weekly interventions were 2x45 min physically active academic lessons, 5x10 min physically active breaks and 5x10 min physically active homework. Aerobic fitness was measured using a 10-min interval running test. Executive function was tested using four cognitive tests (Stroop, verbal fluency, digit span and Trail Making)...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28207972/anatomical-study-of-the-inferior-patellar-pole-and-patellar-tendon
#4
M Edama, I Kageyama, M Nakamura, T Kikumoto, E Nakamura, W Ito, T Takabayashi, T Inai, H Onishi
In this study, detailed investigations of the shape of the inferior patellar pole, the site of the patellar tendon attachment, and the length and course of the patellar tendon were performed with the aim of examining the anatomical factors involved in the developmental mechanism of patellar tendinitis.  The investigation examined 100 legs from 50 cadavers. The inferior patellar pole was classified into three types: Pointed, Intermediate, and Blunt. The attachment of the patellar tendon to the inferior patellar pole was classified into two types: an anterior and a posterior...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28207969/multiple-factors-explain-injury-risk-in-adolescent-elite-athletes-applying-a-biopsychosocial-perspective
#5
Philip von Rosen, Anna Frohm, Anders Kottorp, Cecilia Fridén, Annette Heijne
Many risk factors for injury are presented in the literature, few of those are however consistent and the majority is associated with adult and not adolescent elite athletes. The aim was to identify risk factors for injury in adolescent elite athletes, by applying a biopsychosocial approach. A total of 496 adolescent elite athletes (age range 15-19), participating in 16 different sports, were monitored repeatedly over 52 weeks using a validated questionnaire about injuries, training exposure, sleep, stress, nutrition and competence-based self-esteem...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28207966/relationship-between-the-length-of-the-forefoot-bones-and-performance-in-male-sprinters
#6
Takahiro Tanaka, Tadashi Suga, Mitsuo Ohtsuka, Jun Misaki, Yuto Miyake, Shoma Kudo, Akinori Nagano, Tadao Isaka
Although recent studies have reported that the forefoot bones are longer in sprinters than in non-sprinters, these reports included a relatively small number of subjects. Moreover, while computer simulation suggested that longer forefoot bones may contribute to higher sprint performance by enhancing plantar flexor moment during sprinting, the correlation between forefoot bone length and sprint performance in humans has not been confirmed in observational studies. Thus, using a relatively large sample, we compared the length of the forefoot bones between sprinters and non-sprinters...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28207961/muscle-stiffness-of-posterior-lower-leg-in-runners-with-a-history-of-medial-tibial-stress-syndrome
#7
Junya Saeki, Masatoshi Nakamura, Sayaka Nakao, Kosuke Fujita, Ko Yanase, Noriaki Ichihashi
Previous history of medial tibial stress syndrome (MTSS) is a risk factor for MTSS relapse, which suggests that there might be some physical factors that are related to MTSS development in runners with a history of MTSS. The relationship between MTSS and muscle stiffness can be assessed in a cross-sectional study that measures muscle stiffness in subjects with a history of MTSS, who do not have pain at the time of measurement, and in those without a history of MTSS. The purpose of this study was to compare the shear elastic modulus, which is an index of muscle stiffness, of all posterior lower leg muscles of subjects with a history of MTSS and those with no history and investigate which muscles could be related to MTSS...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28207959/lipoprotein-lipase-activity-does-not-predict-vldl-tg-fatty-acid-oxidation-during-exercise
#8
Esben Søndergaard, Iben R Andersen, Lars P Sørensen, Lars C Gormsen, Søren Nielsen
INTRODUCTION: Exercise lowers plasma triglyceride levels, but the physiological mechanisms remain not fully elucidated. Lipoprotein lipase (LPL) is a key enzyme in facilitating fatty acid uptake from lipoproteins. Since exercise increase the efficiency of VLDL-TG oxidation, we hypothesized that muscle LPL activity would be a rate-limiting step and predict VLDL-TG FA oxidation during exercise. METHODS: Sixteen healthy, lean subjects (8 men and 8 women) were examined before and during an acute exercise bout (90 min at 50% of VO2-max)...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28207954/translation-and-testing-of-measurement-properties-of-the-swedish-version-of-the-ikdc-subjective-knee-form
#9
Hanna Tigerstrand Grevnerts, Karin Grävare Silbernagel, Sofi Sonesson, Clare Ardern, Annika Österberg, Håkan Gauffin, Joanna Kvist
PURPOSE: To translate to Swedish language and cross-culturally adapt the IKDC-SKF, and test the measurement properties of the Swedish version of IKDC-SKF in ACL-injured patients undergoing reconstruction surgery. METHODS: The translation and cross-cultural adaption was performed according to guidelines. 76 patients with an ACL injury filled out the IKDC-SKF and other questionnaires before ACL reconstruction and at 4, 6 and 12 months after surgery. 203 patients from the Swedish ACL-Registry, participated at 8 months post-operative...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28207951/endurance-capacity-and-neuromuscular-fatigue-following-high-vs-moderate-intensity-endurance-training-a-randomised-trial
#10
Thomas J O'Leary, Johnny Collett, Ken Howells, Martyn G Morris
High-intensity exercise induces significant central and peripheral fatigue, however the effect of endurance training on these mechanisms of fatigue is poorly understood. We compared the effect of cycling endurance training of disparate intensities on high-intensity exercise endurance capacity and the associated limiting central and peripheral fatigue mechanisms. Twenty adults were randomly assigned to 6 weeks of either high-intensity interval training (HIIT, 6-8 × 5 min at halfway between lactate threshold and maximal oxygen uptake [50%Δ]) or volume matched moderate-intensity continuous training (CONT, ~60-80 min at 90% lactate threshold)...
February 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28185300/whole-body-vibration-training-as-a-workplace-based-sports-activity-for-employees-with-chronic-low-back-pain
#11
Tobias S Kaeding, Annika Karch, Rebecca Schwarz, Tatjana Flor, Torge-Christian Wittke, Momme Kück, Georg Böselt, Uwe Tegtbur, Lothar Stein
INTRODUCTION: The goal of this randomized and controlled study is to examine whether whole-body vibration (WBV) training is able to reduce back pain and physical disability in seated working office employees with chronic low-back pain in a real-world setting. MATERIALS AND METHODS: A total of 41 subjects (68.3% female/mean age 45.5 ± 9.1 years/mean BMI 26.6 ± 5.2) were randomly allocated to an intervention group (INT (n= 21)) or a control group (CON (n=20). The INT participated in WBV training 2...
February 10, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28181710/on-field-prediction-vs-monitoring-of-aerobic-capacity-markers-using-submaximal-lactate-and-heart-rate-measures
#12
Ibai Garcia-Tabar, Mikel Izquierdo, Esteban M Gorostiaga
This study aimed to validate the use of a single blood lactate concentration measurement taken following a 5-min running bout at 10 km·h(-1) (BLC10 ) and the speed associated with 90% of maximal heart rate (S90 ) to predict and monitor fixed blood lactate concentration (FBLC) thresholds in athletes. Three complementary studies were undertaken. Study-I: A cross-sectional study examining the associations of BLC10 and S90 with running speeds at FBLC of 3 (S3mM) and 4 mmol·L(-1) (S4mM) in 100 athletes. Study-II: A cross-validation study assessing the predictive capacity of BLC10 and S90 to estimate FBLC thresholds in real practice...
February 9, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28173618/organizational-stressors-and-basic-psychological-needs-the-mediating-role-of-athletes-appraisal-mechanisms
#13
Kimberley J Bartholomew, Rachel Arnold, Richard J Hampson, David Fletcher
This paper reports the first study to quantitatively examine the relationships between the demands encountered by athletes that are associated with the organization within which they are operating, cognitive appraisals, and basic psychological need experiences. Three hundred and fifteen high-level British athletes completed a multi-section questionnaire which assessed each of the aforementioned constructs. A series of path analyses provided valuable insight into the way in which the three dimensions (i.e., frequency, intensity and duration) of five organizational stressor categories were evaluated by athletes and, in turn, how such threat or challenge appraisals predicted feelings of need satisfaction and need frustration...
February 7, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28165641/effects-of-nitrate-supplementation-in-trained-and-untrained-muscle-is-modest-with-initial-high-plasma-nitrite-levels
#14
Peter M Christensen, Nanna K Petersen, Signe N Friis, Eddie Weitzberg, Lars Nybo
Nitrate (NO3(-) ) supplementation resulting in higher plasma nitrite (NO2(-) ) is reported to lower resting mean arterial blood pressure (MAP) and oxygen uptake (VO2 ) during submaximal exercise in non-athletic populations, whereas effects in general are absent in endurance trained individuals. To test whether physiological effects of NO3(-) supplementation depend on local muscular training status or cardiovascular fitness, male endurance-trained cyclists (CYC, n=9, VO2 -max: 64±3 ml/min/kg; mean±SD) and recreational active subjects serving as a control group (CON, n=8, 46±3 ml/min/kg), acutely consumed nitrate-rich beetroot-juice ([NO3(-) ] ~9 mmol) (NIT) or placebo (PLA) with assessment of resting MAP and energy expenditure during moderate intensity (~50% VO2 -max) and incremental leg cycling (LEG-ex) and arm cranking exercise (ARM-ex)...
February 6, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28164383/physiological-biochemical-anthropometric-and-biomechanical-influences-on-exercise-economy-in-humans
#15
Carsten Lundby, David Montero, Saskia Gehrig, Ulrika Anderson Hall, Pascal Kaiser, Robert Boushel, Anne-Kristine Meinild Lundby, Niels Kirk, Paola Valdivieso, Martin Flück, Niels H Secher, Frederik Edin, Tobias Hein, Klavs Madsen
Inter-individual variation in running and cycling exercise economy (EE) remains unexplained although studied for more than a century. This study is the first to comprehensively evaluate the importance of biochemical, structural, physiological, anthropometric, and biomechanical influences on running and cycling EE within a single study. In 22 healthy males (VO2 max range 45.5 to 72.1 ml.min(-1) .kg(-1) ) no factor related to skeletal muscle structure (% slow twitch fibre content, number of capillaries per fibre), mitochondrial properties (volume density, oxidative capacity, or mitochondrial efficiency) or protein content (UCP3 and MFN2 expression) explained variation in cycling and running EE among subjects...
February 5, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28164374/motor-competence-and-cardiorespiratory-fitness-have-greater-influence-on-body-fatness-than-physical-activity-across-time
#16
Rodrigo Antunes Lima, Karin A Pfeiffer, Anna Bugge, Niels Christian Møller, Lars Bo Andersen, David F Stodden
AIM: We investigated the longitudinal associations among physical activity (PA), motor competence (MC), cardiorespiratory fitness (VO2peak ) and body fatness across seven years, and also analyzed the possible mediation effects of PA, MC and VO2peak on the relationships with body fatness. MATERIALS AND METHODS: This was a seven-year longitudinal study with three measuring points (mean ages [in years] and respective sample size: 6.75 ±0.37, n=696; 9.59 ±1.07, n=617; 13...
February 5, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28156022/in-vivo-fascicle-behavior-of-the-flexor-hallucis-longus-muscle-at-different-walking-speeds
#17
A Péter, A Hegyi, T Finni, N J Cronin
Ankle plantar flexor muscles support and propel the body in the stance phase of locomotion. Besides the triceps surae, flexor hallucis longus muscle (FHL) may also contribute to this role, but very few in vivo studies have examined FHL function during walking. Here, we investigated FHL fascicle behavior at different walking speeds. Ten healthy males walked overground at three different speeds while FHL fascicle length changes were recorded with ultrasound and muscle activity was recorded with surface electromyography (EMG)...
February 3, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28150871/osteoarthritis-and-joint-replacements-of-the-lower-limb-and-spine-in-ex-professional-soccer-players-a-systematic-review
#18
REVIEW
Monika Lohkamp, Thilo Oliver Kromer, Holger Schmitt
After a professional career as a soccer player, the risk of developing osteoarthritis (OA) in different joints of the spine and lower limb might be increased. The extent of this problem to date is not clear. Therefore, the aim of this systematic review is to summarise the prevalence of OA and joint replacement of the lower limb and spine in former professional soccer players. Relevant databases were searched with different combinations of key words: e.g. osteoarthritis, hip, knee, ankle, foot, joint replacement, soccer...
February 2, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28150870/seated-limits-of-stability-of-athletes-with-disabilities-with-regard-to-competitive-levels-and-sport-classification
#19
Paula B R Santos, Patrícia S Vigário, Míriam R M Mainenti, Arthur S Ferreira, Thiago Lemos
We aimed to evaluate the influence of wheelchair rugby (WR) classification and competitive level on the seated limits of stability of athletes with disabilities. Twenty-eight athletes were recruited from international and national level WR teams. Athletes were distributed into three groups per their classification: low-point (0.5-1.5-point); mid-point (2.0-2.5-point); and high-point (3.0-3.5-point). Athletes were asked to sit on a force platform placed upon a wooden block and to lean the body as far as possible in eight pre-defined directions...
February 2, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28144978/effect-of-team-sports-and-resistance-training-on-physical-function-%C3%A2-quality-of-life-and-motivation-in-older-adults
#20
M T Pedersen, J Vorup, A Nistrup, J M Wikman, J M Alstrøm, P S Melcher, G U Pfister, J Bangsbo
The aim of this study was to investigate the effect of team sports and resistance training on physical function, psychological health, quality of life, and motivation in older untrained adults. Twenty-five untrained men and forty-seven untrained women aged 80 (range: 67-93) years were recruited. Fifty-one were assigned to a training group (TRG) of which twenty-five performed team training (TG) and twenty-six resistance training (RG). The remaining twenty-one were allocated to a control group (CG). TRG trained for 1 hour twice a week for 12 weeks...
February 1, 2017: Scandinavian Journal of Medicine & Science in Sports
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