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Scandinavian Journal of Medicine & Science in Sports

Tanja Matarma, Hanna Lagström, Saija Hurme, Tuija Tammelin, Janne Kulmala, Lisa M Barnett, Pasi Koski
PURPOSE: This study examined how motor skills are associated with physical activity (PA), sedentary time, body fat, and day care attendance among young children. Also, the motor skills of healthy weight children were compared to those who were overweight or obese. METHODS: The study population consisted of five to six years-old children (n=111; 45 boys) who participated in the longitudinal STEPS Study carried out in Southwest Finland in 2013-2014. Motor skills were measured with the Bruininks-Oseretsky Test, second edition (BOT-2) including fine manual control, manual coordination, body coordination, and strength and agility...
July 13, 2018: Scandinavian Journal of Medicine & Science in Sports
B K Coombes, K Tucker, B Vicenzino, V Vuvan, R Mellor, L Heales, A Nordez, F Hug
We thank Zhang and colleagues for their letter to the editor which raises the question as to whether insertional and non-insertional (or mid-portion) Achilles tendinopathy have different "stiffness patterns". This proposal is based on findings of greater 'hardness' in insertional Achilles tendinopathy in the study by Zhang et al (1), and lower 'elastic modulus' in the study by Coombes et al (2), which recruited participants with a clinical diagnosis of Achilles tendinopathy at either region. While plausible, there are several critical differences between the two studies that ought to be considered...
July 13, 2018: Scandinavian Journal of Medicine & Science in Sports
Qi Zhang, Qianru Li, Yinghui Hua
We read with great interest the article by Coombes and colleagues [1], who utilized shear wave elastography to compare tendon stiffness of healthy subjects with those with Achilles or patellar tendinopathy. The results showed that compared to healthy controls, patients with Achilles and patellar tendinopathy exhibited lower Achilles tendon stiffness and higher patellar tendon stiffness, respectively. One of the limitations Coombes et al. mentioned in the Discussion section was the heterogeneous tendinopathic population, which included participants with insertional Achilles tendinopathy (n=9; 41%) and non-insertional Achilles tendinopathy (n = 19; 87%) [1]...
July 13, 2018: Scandinavian Journal of Medicine & Science in Sports
J Uth, B Fristrup, R D Haahr, K Brasso, J W Helge, M Rørth, J Midtgaard, E W Helge, P Krustrup
This study investigated the association between long-term adherence to football training and retaining bone mineralization and physical capacity in men with prostate cancer (PCa) managed with androgen deprivation therapy (ADT). Patients completing follow-up at 32 weeks in the FC Prostate Randomized Controlled Trial (RCT) in 2012 or 2013 were invited to 5-year follow-up assessments in May 2017 (n = 30). Changes in physiological outcomes over time between the football participants (FTG) and nonparticipants (CON) were examined...
July 12, 2018: Scandinavian Journal of Medicine & Science in Sports
Fearghal P Behan, Scott Willis, Matt T G Pain, Jonathan P Folland
The effect of football specific fatigue on explosive neuromuscular performance and dynamic balance has received little attention in the literature despite the potential consequences for injury risk. This study aimed to investigate the effect of fatigue induced by simulated football match-play on maximal and explosive knee flexor (KF) and knee extensor (KE) torque, and thus the maximal and explosive KF/KE ratio, as well as the effect of fatigue induced by simulated football match-play on whole-body response to disturbances in balance...
July 7, 2018: Scandinavian Journal of Medicine & Science in Sports
P Robach, A Pichon, C Siebenmann, B R Rønnestad, C Lundby
Millet and Brocherie argue that responses to altitude could have occurred in our control group living and training at 1000-1500 m. First, their argumentation is somewhat imprecise since the participants lived at 1035 m and spent 82% of total training time between 550 and 1100 m.1 Second, their statement is surprising since in one of their own studies the authors deemed it acceptable to compare a control group living and training at 1150 m to a LHTL group living at 2250 m.2 Most importantly, however, Millet and Brocherie do not provide evidence supporting their statement...
July 7, 2018: Scandinavian Journal of Medicine & Science in Sports
Grégoire P Millet, Franck Brocherie
The study by Robach et al. 1 aimed to test the hypothesis that LHTL in hypobaric hypoxia improves exercise performance in elite endurance athletes. The authors have to be commended for this logistical challenge of having two VO2max -matched groups training together between 600 and 1500m but either sleeping at 2207m (LHTL, n = 11) or at 1035 m (Control, n = 8). This protocol allows a good matching of the training loads and it was expected that it could "isolate" the specific effects of hypoxia in the LHTL group...
July 7, 2018: Scandinavian Journal of Medicine & Science in Sports
N Cvetković, E Stojanović, N Stojiljković, D Nikolić, A T Scanlan, Z Milanović
This study compared the effects of recreational football and high-intensity interval training (HIIT) on body composition, muscular fitness, and cardiorespiratory fitness in overweight and obese children. Forty-two overweight/obese males aged 11-13 years [body mass index (BMI) >20.5 kg/m2 ] were randomly assigned to a recreational football training group (n = 14; 157.9 ± 5.8 cm; 63.7 ± 12.6 kg), HIIT group (n = 14; 163.8 ± 9.4 cm; 71.5 ± 10.5 kg), or nontraining control group (n = 14; 162...
July 6, 2018: Scandinavian Journal of Medicine & Science in Sports
Enda King, Chris Richter, Andy Franklyn-Miller, Katherine Daniels, Ross Wadey, Ray Moran, Siobhan Strike
INTRODUCTION: Previous studies examining jump tasks after anterior cruciate ligament reconstruction (ACLR) have focused on performance measures without examining joint kinematic and kinetic variables. The aim of this study was to identify differences in biomechanical and performance measures between limbs across tests nine months after surgery. METHODS: Four jump tests (double leg drop jump (DLDJ), single leg drop jump (SLDJ), single leg hop for distance (SLHD) and hurdle hop (HH)) were carried out on 156 male subjects in a 3D-motion capture laboratory nine months after surgery...
July 4, 2018: Scandinavian Journal of Medicine & Science in Sports
Walid Bouaziz, Elise Schmitt, Thomas Vogel, François Lefebvre, Romain Remetter, Evelyne Lonsdorfer, Pierre-Marie Leprêtre, Georges Kaltenbach, Bernard Geny, Pierre-Olivier Lang
Interval aerobic training programs (IATP) improve cardiorespiratory and endurance parameters. They are however unsuitable to seniors as frequently associated with occurrence of exhaustion and muscle pain. The purpose of this study was to measure the benefits of an IATP designed with recovery bouts (IATP-R) in terms of cardiorespiratory and endurance parameters and its acceptability among seniors (≥70 years). Sedentary healthy volunteers were randomly assigned either to IATP-R or sedentary lifestyle. All participants performed an incremental cycle exercise and 6-minute walk test (6-MWT) at baseline and 9...
July 3, 2018: Scandinavian Journal of Medicine & Science in Sports
Viswanath B Unnithan, Thomas W Rowland, Keith George, Rachel Lord, David Oxborough
It is unclear, what the underlying cardiovascular mechanisms are that give rise to the high level of aerobic fitness seen in youth soccer players. The aim of the study was to evaluate global and regional markers of systolic and diastolic function in a group of pre-adolescent soccer players during an incremental exercise test. Twenty-two, male soccer players (SP) from two professional soccer clubs (age: 12.0 ± 0.3 years) volunteered for the study. Fifteen recreationally active boys (CON), of similar age (age: 11...
July 3, 2018: Scandinavian Journal of Medicine & Science in Sports
Trent J Herda, Eric D Ryan, Martin Kohlmeier, Michael A Trevino, Gena R Gerstner, Erica J Roelofs
Neuromuscular function in young overweight/obese (OF) children is not well described. AIM: This study examined isometric and isokinetic leg extensor strength, muscle size (mCSA) and tissue composition as measured via echo intensity (mEI), and motor unit (MU) firing rates in normal weight (NW) and OF children aged 7 to 10 years. METHODS: Fourteen NW (8 girls and 6 boys, BMI:15.8±1.4 kg/m2 ) and 15 OF (10 girls and 5 boys, BMI:20.8±2.3 kg/m2 ) children volunteered to perform this study...
June 30, 2018: Scandinavian Journal of Medicine & Science in Sports
Christopher Skazalski, Rod Whiteley, Roald Bahr
PURPOSE: Training volume has been associated with jumper's knee in volleyball players, but jump variability among professionals has not been investigated and individual jump demands are unknown. The purpose of this study was to examine position-specific jump demands required for training and competition during a professional volleyball season and to investigate the individual variability associated with jump load. METHODS: Jumps performed by 14 professional players during one season of training and competition were timestamped, individually assigned, and recorded for jump height...
June 29, 2018: Scandinavian Journal of Medicine & Science in Sports
Monica Klungland Torstveit, Bjørn Tore Johansen, Siri Håvås Haugland, Tonje Holte Stea
Adolescence is a pivotal time for investing in both present and future health. Thus, it is important to identify arenas for promoting positive adolescent health behaviours and preventing negative ones. The aim of this study was to investigate the associations between organized sports participation (OSP) and a broad range of lifestyle habits in Norwegian adolescents. A comprehensive survey was completed by 13,269 junior high and high school students in southern Norway. Multivariable binary logistic regression models, adjusted for gender, age, and parental education, were used to investigate the associations between OSP and adolescent substance use, dietary habits, physical activity level, passive vs...
June 28, 2018: Scandinavian Journal of Medicine & Science in Sports
James F Timmons, Dean Minnock, Michelle Hone, Karl E Cogan, John C Murphy, Brendan Egan
A supervised 12 week intervention of time-matched aerobic versus resistance versus concurrent exercise training was employed to investigate mode- and time course-specific effects of exercise training in older adults. Community-dwelling men and women (n=84; M/F, 45/39; 69.3±3.5 y; 26.4±3.8 kg m-2 ) were randomly assigned (n=21 each) to either non-exercise control (CON), aerobic exercise only (AER), resistance exercise only (RES), or concurrent aerobic and resistance exercise (CEX). Training groups trained three times per week, each performing 72 min of active exercise time per week...
June 27, 2018: Scandinavian Journal of Medicine & Science in Sports
Anthony David Kay, Bethanee Rubley, Chris Talbot, Minas Mina, Anthony William Baross, Anthony John Blazevich
INTRODUCTION: Stretching highly-contracted plantar flexor muscles (isokinetic eccentric contractions) results in beneficial adaptations in muscle strain risk factors; however its effects in other muscle groups, and on architectural characteristics and exercise-induced muscle damage (EIMD), are unknown. METHODS: The influence of a 6-week knee extensor training programme was studied in 26 volunteers (13 control; 13 experimental). Before and after the training programme, passive and maximal isometric and eccentric knee extensor moments and range of motion (ROM) were recorded on an isokinetic dynamometer with simultaneous ultrasound imaging of vastus lateralis (VL)...
June 26, 2018: Scandinavian Journal of Medicine & Science in Sports
L Farah, J Schorer, J Baker, N Wattie
Inconsistencies in community size effects found between and within countries1-3 suggest population size may not be an accurate predictor of athlete development, and that other proxies of early environmental characteristics are needed. Researchers have begun to explore the influence of population density and proximity to local sport clubs on athlete development in European countries; however, similar analysis remains to be conducted in Canadian ice hockey. The current study focused on National Hockey League (NHL) draftees and explored whether population density and proximity to Canadian Hockey League teams were associated with the number of draftees produced...
June 25, 2018: Scandinavian Journal of Medicine & Science in Sports
Young-Gyun Seo, Jae Hyun Kim, YoonMyung Kim, Hyunjung Lim, Young-Su Ju, Min Jae Kang, Kwanseop Lee, Hye-Ja Lee, Han Byul Jang, Sang Ick Park, Kyung Hee Park
This study aimed to validate body composition analysis using bioelectrical impedance analysis (BIA) against dual-energy X-ray absorptiometry (DXA) in children with obesity and to compare agreement between BIA and DXA according to their degree of obesity. 316 children aged 6-17 years participated in the Intervention for Childhood and Adolescents Obesity via Activity and Nutrition study. We divided participants by body mass index (BMI) percentile (group 1: mild to moderate obesity; group 2: severe obesity) and compared body composition variables, e...
June 25, 2018: Scandinavian Journal of Medicine & Science in Sports
Thayse Natacha Gomes, Alan Nevill, Peter T Katzmarzyk, Sara Pereira, Marcos Moura Dos Santos, Rojapon Buranarugsa, Fernanda Dos Santos, Michele Souza, Raquel Chaves, José Maia
This study investigated the association of six different anthropometric markers with metabolic syndrome to find the most suited to predict children at risk. Sample comprises 1324 Portuguese youth (701 girls, 623 boys), aged 10-17 years. Six anthropometric markers were included: body mass index (BMI), BMI z-score, tri-ponderal index (TPI), waist circumference (WC), WC/height ratio (WC/H), and WC/H adjusted ratio (WC/Hadj ). A standardized metabolic risk score (zMR) was computed by summing of standardized values for fasting glucose, triglycerides, high density lipoprotein cholesterol, and mean arterial blood pressure...
June 23, 2018: Scandinavian Journal of Medicine & Science in Sports
Daniel Niederer, Tobias Engeroff, Jan Wilke, Lutz Vogt, Winfried Banzer
OBJECTIVES: A media-based collection and further analysis of relative return to play (RTP) rates and the corresponding quality of play after anterior cruciate ligament (ACL) rupture in top level football was the aim of our study. METHODS: In the 5-year case-control study, male players from the first two leagues of the five European countries top leagues, who sustained a total ACL rupture during the season 2010/11 and/or 2011/12, were included. For them and a matched control sample (ratio 1:2), data were retrieved from the publicly available and validated media-based platforms (transfermarkt...
June 21, 2018: Scandinavian Journal of Medicine & Science in Sports
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