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https://www.readbyqxmd.com/read/28514233/energy-balance-over-one-athletic-season
#1
Analiza M Silva, Catarina N Matias, Diana A Santos, Diana Thomas, Anja Bosy-Westphal, Manfred J Müller, Steven B Heymsfield, Luís B Sardinha
INTRODUCTION: Magnitude and variation in energy balance (EB) components over an athletic season are largely unknown. PURPOSE: We investigated the longitudinal changes in EB over one season and explored the association between EB variation and the change in the main fat-free mass (FFM) components in highly trained athletes. METHODS: Eighty athletes (54 males; handball, volleyball, basketball, triathlete, and swimming) were evaluated from the beginning of the season to the main competition stage...
March 22, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28505580/factors-affecting-perceived-change-in-physical-activity-in-pregnancy
#2
Astrid Merkx, Marlein Ausems, Luc Budé, Raymond de Vries, Marianne J Nieuwenhuijze
OBJECTIVE: reduction of physical activity (PA) during pregnancy is common but undesirable, as it is associated with negative outcomes, including excessive gestational weight gain. Our objective was to explore changes in five types of activity that occurred during pregnancy and the behavioural determinants of the reported changes in PA. DESIGN: we performed a secondary analysis of a cross sectional survey that was constructed using the ASE-Model - an approach to identifying the factors that drive behaviour change that focuses on Attitude, Social influence, and self-Efficacy...
May 9, 2017: Midwifery
https://www.readbyqxmd.com/read/28492862/establishing-baseline-normative-values-for-the-child-sport-concussion-assessment-tool
#3
M Alison Brooks, Traci R Snedden, Benjamin Mixis, Scott Hetzel, Timothy A McGuine
Importance: The Child Sport Concussion Assessment Tool (SCAT3) is a postconcussion sideline assessment tool measuring symptoms, cognition, and balance in preadolescent children. Minimal normative baseline data exist to aid decision making in clinical and athletic settings. Objective: To collect normative baseline data for the Child SCAT3 in a large cohort of young athletes. Design, Setting, and Participants: A cross-sectional study was conducted from May 31 to August 12, 2014, at various sporting events (basketball, soccer, baseball, and swimming) in Central Wisconsin among children 5 to 13 years of age who were English-speaking and did not report a lower leg injury within the past 2 months or a concussion within the past month...
May 8, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28488921/sex-differences-in-world-record-performance-the-influence-of-sport-discipline-and-competition-duration
#4
Øyvind Sandbakk, Guro Strøm Solli, Hans-Christer Holmberg
In the present review, we summarize scientific knowledge concerning sex differences in world record performance and the influence of sport discipline and competition duration. In addition, we discuss how physiological factors relate to sex dimorphism. While cultural factors played a major role in the rapid improvement of performance of women relative to men up until the 1990's, sex differences between the world's best athletes in most events have remained relatively stable at approximately 8-12%. The exceptions are events in which upper-body power is a major contributor, where this difference is more than 15%, and ultra-endurance swimming, where the gap is now less than 5%...
May 10, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28459360/strength-training-for-middle-and-long-distance-performance-a-meta-analysis
#5
Nicolas Berryman, Inigo Mujika, Denis Arvisais, Marie Roubeix, Carl Binet, Laurent Bosquet
PURPOSE: The objective of this study was to assess the net effects of strength training on middle- and long-distance performance through a meta-analysis of the available literature. METHODS: Three databases were searched from which 28 out of 554 potential studies met all inclusion criteria. Standardized mean differences (SMDs) were calculated and weighted by the inverse of variance to calculate an overall effect and its 95% confidence interval (CI). Subgroup analyses were conducted to determine whether the strength-training intensity, duration and frequency, and population performance level, age, sex and sport were outcomes that may influence the magnitude of the effect...
May 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28441739/the-use-of-immus-in-a-water-environment-instrument-validation-and-application-of-3d-multi-body-kinematic-analysis-in-medicine-and-sport
#6
Anna Lisa Mangia, Matteo Cortesi, Silvia Fantozzi, Andrea Giovanardi, Davide Borra, Giorgio Gatta
The aims of the present study were the instrumental validation of inertial-magnetic measurements units (IMMUs) in water, and the description of their use in clinical and sports aquatic applications applying customized 3D multi-body models. Firstly, several tests were performed to map the magnetic field in the swimming pool and to identify the best volume for experimental test acquisition with a mean dynamic orientation error lower than 5°. Successively, the gait and the swimming analyses were explored in terms of spatiotemporal and joint kinematics variables...
April 22, 2017: Sensors
https://www.readbyqxmd.com/read/28409200/return-to-sport-after-shoulder-arthroplasty-a-systematic-review-and-meta-analysis
#7
Joseph N Liu, Michael E Steinhaus, Grant H Garcia, Brenda Chang, Kara Fields, David M Dines, Russell F Warren, Lawrence V Gulotta
PURPOSE: With increasing incidence and indications for shoulder arthroplasty, there is an increasing emphasis on the ability to return to sports. The main goal of this study was to determine the rate of return to sport after shoulder arthroplasty. METHODS: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed to perform this systematic review and meta-analysis. A search was performed on MEDLINE, Scopus, EMBASE, and the Cochrane Library...
April 13, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28361193/return-to-sports-and-work-after-partial-shoulder-replacement-surgery
#8
M Bülhoff, B Sowa, T Bruckner, F Zeifang, P Rais
BACKGROUND: Shoulder hemiarthroplasty is a particularly attractive treatment option in young active patients, where revision surgery is an issue and a glenoid replacement might be necessary in the long run. These patients often ask about the possibility of returning to sport and work after surgery. OBJECTIVE: The purpose of this investigation was to analyze whether patients undergoing shoulder hemiarthroplasty (HSA) are able to successfully return to sports activities and work after surgery...
March 30, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28337944/the-influence-of-gate-start-position-on-physical-performance-and-anxiety-perception-in-expert-bmx-athletes
#9
Franck Di Rienzo, Guillaume Martinent, Lucie Levêque, Tadhg MacIntyre, Christian Collet, Aymeric Guillot
The critical importance of the start phase in bicycle motocross (BMX) racing is increasingly acknowledged. Past experiments underlined that the internal lane of the starting gate provides a strong positional advantage. However, how lane position affects start performance and cognitive and somatic state anxiety remains unexplored. We examined the start performance and anxiety responses of youth national-level BMX riders in both experimental and ecological contexts. We used contextualization motor imagery routines to evaluate start performance and state anxiety from the internal and external lanes...
March 24, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28319426/high-satisfaction-and-return-to-sports-after-total-shoulder-arthroplasty-in-patients-aged-55-years-and-younger
#10
Grant H Garcia, Joseph N Liu, Alec Sinatro, Hao-Hua Wu, Joshua S Dines, Russell F Warren, David M Dines, Lawrence V Gulotta
BACKGROUND: Young, active candidates for total shoulder arthroplasty (TSA) are a unique group of patients. Not only do they demand longevity and improved function, but they also desire a return to physical activities. PURPOSE: To determine the rate of return to sports in patients aged ≤55 years undergoing TSA. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: This was a retrospective review of consecutive patients who underwent anatomic TSA at a single institution...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28247104/acute-type-a-aortic-dissection-associated-with-a-sporting-activity
#11
Ryo Itagaki, Naoyuki Kimura, Satoshi Itoh, Atsushi Yamaguchi, Hideo Adachi
PURPOSE: To investigate the clinical characteristics of acute type A aortic dissection (ATAAD) occurring during a sporting activity. METHODS: The subjects of this study were 615 patients who underwent surgery for ATAAD between 1990 and 2015. The patients were divided into two groups according to whether the ATAAD was associated with a sporting activity (sports group: n = 25, mean age 62.3 years; non-sports group: n = 590, mean age 63.7 years). Specific activity was assessed in the sports group, and the characteristics and outcomes were compared between the groups...
February 28, 2017: Surgery Today
https://www.readbyqxmd.com/read/28236311/laryngoscopy-during-swimming-a-novel-diagnostic-technique-to-characterize-swimming-induced-laryngeal-obstruction
#12
Emil S Walsted, Laura L Swanton, Ken van van Someren, Tessa E Morris, Matthew Furber, Vibeke Backer, James H Hull
Exercise-induced laryngeal obstruction (EILO) is a key differential diagnosis for respiratory symptoms in athletes and is particularly prevalent in aquatic athletes. A definitive diagnosis of EILO is dependent on laryngoscopy, performed continuously, while an athlete engages in the sport that precipitates their symptoms. This report provides the first description of the feasibility of performing continuous laryngoscopy during exercise in a swimming environment. The report describes the methodology and safety of the use of continuous laryngoscopy while swimming...
February 25, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28214540/cognitive-performance-of-male-and-female-c57bl-6j-mice-after-repetitive-concussive-brain-injuries
#13
Alexander G Velosky, Laura B Tucker, Amanda H Fu, Jiong Liu, Joseph T McCabe
In contact sports, repetitive concussive brain injury (rCBI) is the prevalent form of head injury seen in athletes. The need for effective treatment is urgent as rCBI has been associated with a host of cognitive, behavioral and neurological complaints. There has been a growing trend in the use of female animals in pre-clinical research, but few studies have investigated possible sex differences following rCBI. The goal of the current study was to determine any differences between male and female C57BL/6J mice on assessments of learning and memory after repetitive concussive injury...
May 1, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28195972/individual-and-combined-influence-of-ace-and-actn3-genes-on-muscle-phenotypes-in-polish-athletes
#14
Joanna Orysiak, Joanna Mazur-Różycka, Krzysztof Busko, Jan Gajewski, Beata Szczepanska, Jadwiga Malczewska-Lenczowska
The aim of this study was to examine the association between ACE and ACTN3 genes, independently or in combination, and muscle strength and power in male and female athletes. The study involved 398 young male (n=266) and female (n=132) athletes representing various sport disciplines (ice hockey, canoeing, swimming, volleyball). All were Caucasians. The following measurements were taken: height of jump and mechanical power in countermovement jump (CMJ) and spike jump (SPJ), and muscle strength of 10 muscle groups (flexors and extensors of the elbow, shoulder, hip, knee and trunk)...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28182502/effect-of-dietary-nitrate-supplementation-on-swimming-performance-in-trained-swimmers
#15
Sam Lowings, Oliver Michael Shannon, Kevin Deighton, Jamie Matu, Matthew John Barlow
Nitrate supplementation appears to be most ergogenic when oxygen availability is restricted and subsequently may be particularly beneficial for swimming performance due to the breath-hold element of this sport. This represents the first investigation of nitrate supplementation and swimming time-trial (TT) performance. In a randomised double-blind repeated-measures crossover study, ten (5male, 5female) trained swimmers ingested 140ml nitrate-rich (~12.5mmol nitrate) or nitrate-depleted (~0.01mmol nitrate) beetroot juice...
February 9, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28181208/individual-environment-interactions-in-swimming-the-smallest-unit-for-analysing-the-emergence-of-coordination-dynamics-in-performance
#16
Brice Guignard, Annie Rouard, Didier Chollet, John Hart, Keith Davids, Ludovic Seifert
Displacement in competitive swimming is highly dependent on fluid characteristics, since athletes use these properties to propel themselves. It is essential for sport scientists and practitioners to clearly identify the interactions that emerge between each individual swimmer and properties of an aquatic environment. Traditionally, the two protagonists in these interactions have been studied separately. Determining the impact of each swimmer's movements on fluid flow, and vice versa, is a major challenge. Classic biomechanical research approaches have focused on swimmers' actions, decomposing stroke characteristics for analysis, without exploring perturbations to fluid flows...
February 8, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28121799/compensatory-changes-in-energy-balance-regulation-over-one-athletic-season
#17
Analiza M Silva, Catarina N Matias, Diana A Santos, Diana Thomas, Anja Bosy-Westphal, Manfred J Müller, Steven B Heymsfield, Luís B Sardinha
PURPOSE: Mechanisms in energy balance (EB) regulation may include compensatory changes in energy intake (EI) and metabolic adaption (MA) but information is unavailable in athletes who often change EB components. We aim to investigate EB regulation compensatory mechanisms over one athletic season. METHODS: Fifty-seven athletes (39 males/18 females; handball, volleyball, basketball, triathlon, and swimming) were evaluated from the beginning to the competitive-phase of the season...
January 24, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28121323/ingestion-of-soy-whey-blended-protein-augments-sports-performance-and-ameliorates-exercise-induced-fatigue-in-a-rat-exercise-model
#18
Guangxu Ren, Suqing Yi, Hongru Zhang, Jing Wang
This study sought to determine the effects of soy-whey blended protein supplementation on sports performance and related biochemical parameters after long-term training. After a week of adaptation, eighteen 6-week-old male Wistar rats were randomly assigned to 3 groups: the standard chow diet plus whey protein (Whey) group, the standard chow diet plus soy-whey blended protein (BP) group and the standard chow diet only (control) group. Each group included 6 rats for the seven-week experiment. Before the experiment, the baseline values of body weight, grasping force and time to exhaustion due to the loaded-swimming test were recorded for each group...
February 22, 2017: Food & Function
https://www.readbyqxmd.com/read/28094616/racket-sports-stave-off-death-better-than-swimming-or-aerobics
#19
(no author information available yet)
Racket sports, swimming and aerobics are associated with the best chance of staving off death, new study results suggest.
January 4, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28075521/association-between-adolescent-sport-activities-and-lumbar-disk-degeneration-among-young-adults
#20
J Takatalo, J Karppinen, S Näyhä, S Taimela, J Niinimäki, R Blanco Sequeiros, T Tammelin, J Auvinen, O Tervonen
The relationship between different sport activities and lumbar intervertebral disk degeneration (DD) is largely unknown. We evaluated whether adolescent participation in different sports is associated with lumbar DD in a population-based birth cohort of young adults. A total of 558 young adults (325 females and 233 males) underwent magnetic resonance imaging (MRI, 1.5-T scanner). A DD sum score, based on the Pfirrmann grading, was calculated for all lumbar levels. The sum score was categorized into no DD, 1, 2, or at least 3...
January 11, 2017: Scandinavian Journal of Medicine & Science in Sports
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