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https://www.readbyqxmd.com/read/28810991/posterior-cruciate-ligament-injuries-associated-with-military-survival-swim-training
#1
Michael S Crowell, John S Mason, Matthew A Posner, Chad A Haley
OBJECTIVES: Posterior cruciate ligament (PCL) injuries are relatively common injuries associated with athletic activities and high-energy trauma. Posterolateral corner (PLC) injuries frequently accompany injury to the PCL. Diagnosis can be challenging and requires a comprehensive history and physical examination. Patients frequently report vague, nonspecific symptoms and the mechanism of injury is often useful in localizing injured structures. Two of the more common mechanisms for PCL injury include a direct blow to the proximal anterior tibia with the knee flexed, as well as a significant knee hyperextension injury...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28808766/water-penetration-of-grommets-an-in-vitro-study
#2
Yousef Ibrahim, Paul Fram, Gavin Hughes, Pete Phillips, David Owens
The insertion of grommets has been one of the most common procedures carried out by ENT surgeons for patients with persistent middle ear fluid. There has always been apprehension at the use of grommets by patients undertaking swimming or other water sports due to concerns of grommet penetration by water into the middle ear. Despite this, no common consensus exists amongst otolaryngologists regarding post-operative advice following grommet insertion. Most studies focus on surface swimming and do not consider other activities such as diving that patients may undertake...
August 14, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28799866/proprioception-and-flexibility-profiles-of-elite-synchronized-swimmers
#3
Nora M Y Cho, Hedda P Giorgi, Karen P Y Liu, Young-Hyeon Bae, Louisa M Y Chung, Kitchana Kaewkaen, Shirley S M Fong
This study compared the full-body flexibility and joint proprioception (on land and underwater) of (a) 20 elite female synchronized swimmers (mean age ± standard deviation = 18.5 ± 1.9 years) and (b) 20 college female swim team members with no training in synchronized swimming (control participants; mean age ± standard deviation = 20.6 ± 1.3 years). Flexibility of the trunk and upper and lower limbs was measured using plastic tape and a goniometer, respectively. Joint proprioception (joint position sense) of the upper and lower limbs on land and underwater was measured by an active joint angle repositioning test...
January 1, 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/28796129/pacing-profiles-and-competitive-performance-of-elite-female-400-m-freestyle-swimmers
#4
Patrycja Lipinska, Will G Hopkins
Pacing can impact competitive endurance performance. The objective of this study was to determine relationships between pacing parameters and competitive performance of elite female 400-m freestyle swimmers. Publicly available websites provided 50-m split and final times for 381 swims of 20 elite female swimmers in over 150 national and international competitions between 2004 and 2016. Most pacing profiles displayed negative quadratic curvature, with the fifth of the eight laps being the median slowest. The mean times for the first and last laps were faster than predicted by the quadratic by 5...
August 4, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28756389/sports-injury-and-illness-incidence-in-the-rio-de-janeiro-2016-olympic-summer-games-a-prospective-study-of-11-274-athletes-from-207-countries
#5
Torbjørn Soligard, Kathrin Steffen, Debbie Palmer, Juan Manuel Alonso, Roald Bahr, Alexandre Dias Lopes, Jiri Dvorak, Marie-Elaine Grant, Willem Meeuwisse, Margo Mountjoy, Leonardo Oliveira Pena Costa, Natalia Salmina, Richard Budgett, Lars Engebretsen
OBJECTIVE: To describe the pattern of injuries and illnesses sustained during the Games of the XXXI Olympiad, hosted by Rio de Janeiro from 5 to 21 August 2016. METHODS: We recorded the daily incidence of athlete injuries and illnesses (1) through the reporting of all National Olympic Committee (NOC) medical teams and (2) in the polyclinic and medical venues by the Rio 2016 medical staff. RESULTS: In total, 11 274 athletes (5089 women, 45%; 6185 men, 55%) from 207 NOCs participated in the study...
July 29, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28749151/on-the-boundary-conditions-of-effort-losses-and-effort-gains-in-action-teams
#6
Joachim Hüffmeier, Michael Filusch, Jens Mazei, Guido Hertel, Andreas Mojzisch, Stefan Krumm
While people's willingness to work hard can be reduced in teams (i.e., effort losses in teams as compared with individual work), it is less recognized that teamwork can also stimulate additional efforts (i.e., effort gains). Building on and extending existing theory, we (a) suggest an integration of these two research streams, and (b) provide evidence for team-related effort gains in action teams. In a first study, we tested our predictions by reanalyzing a field data set of 302,576 swimming performances in individual and relay races (Neugart & Richiardi, 2013)...
July 27, 2017: Journal of Applied Psychology
https://www.readbyqxmd.com/read/28746660/somatic-maturation-and-the-relationship-between-bone-mineral-variables-and-types-of-sports-among-adolescents-cross-sectional-study
#7
Ricardo Ribeiro Agostinete, Igor Hideki Ito, Han Kemper, Carlos Marcelo Pastre, Mário Antônio Rodrigues-Júnior, Rafael Luiz-de-Marco, Rômulo Araújo Fernandes
CONTEXT AND OBJECTIVE: Peak height velocity (PHV) is an important maturational event during adolescence that affects skeleton size. The objective here was to compare bone variables in adolescents who practiced different types of sports, and to identify whether differences in bone variables attributed to sports practice were dependent on somatic maturation status. DESIGN AND SETTING: Cross-sectional study, São Paulo State University (UNESP). METHODS: The study was composed of 93 adolescents (12 to 16...
May 2017: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/28731885/effectiveness-of-a-posterior-shoulder-stretching-program-on-university-level-overhead-athletes-randomized-controlled-trial
#8
Judy C Chepeha, David J Magee, Martin Bouliane, David Sheps, Lauren Beaupre
OBJECTIVE: To determine whether a posterior shoulder stretch was effective in increasing internal rotation (IR) and horizontal adduction (HAd) range of motion (ROM) in overhead athletes identified as having reduced mobility. DESIGN: Randomized controlled trial (parallel design). SETTING: University-based sports medicine clinic. PARTICIPANTS: Thirty-seven university-level athletes in volleyball, swimming, and tennis, with IR ROM deficits ≥15°, were randomized into intervention or control groups...
July 14, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28719752/return-to-sport-after-shoulder-arthroplasty-in-recreational-athletes-a-systematic-review-and-meta-analysis
#9
Florence Aim, Jean-David Werthel, Julien Deranlot, Marie Vigan, Geoffroy Nourissat
BACKGROUND: One of the most frequent demands from patients after shoulder replacement surgery is to return to sport. PURPOSE: To determine the rate of return to sport after shoulder arthroplasty (total shoulder arthroplasty, reverse shoulder arthroplasty, hemiarthroplasty) in recreational athletes. STUDY DESIGN: Meta-analysis and systematic review. METHODS: The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines were followed to perform this systematic review and meta-analysis of the results in the literature as well as the presentation of results...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28714746/age-related-changes-in-endurance-performance-vary-between-modes-of-locomotion-in-men-an-analysis-of-master-world-records
#10
Romuald Lepers, Paul J Stapley, Thomas Cattagni
BACKGROUND: Age-related declines in sport performance are characteristic of all endurance and sprinting disciplines. However, it is not known if the mode of locomotion (i.e. swimming, cycling or running) influences the age-related decline in sport performance in sprinting and endurance events. METHODS: To examine the age-related decline in three different modes of locomotion (i.e. swimming, cycling and running) for endurance and sprint events, the world best performances achieved for males in the age-groups 18-39 years, 40-44 years, 45-49 years, 50-54 years, 55-59 years, 60-64 years, 65-69 years, 70-74 years, 75-79 years and 80-84 years, were compared in swimming (1500-m and 50-m), cycling (1-h and 200-m) and running (10-km and 100-m)...
July 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28701720/physiological-demands-of-a-swimming-based-video-game-influence-of-gender-swimming-background-and-exergame-experience
#11
Pooya Soltani, Pedro Figueiredo, João Ribeiro, Ricardo J Fernandes, João Paulo Vilas-Boas
Active video games (exergames) may provide short-term increase in energy expenditure. We explored the effects of gender and prior experience on aerobic and anaerobic energy systems contributions, and the activity profiles of 40 participants playing with a swimming exergame. We recorded oxygen consumption and assessed blood lactate after each swimming technique. We also filmed participants' gameplays, divided them into different phases and tagged them as active or inactive. Anaerobic pathway accounted for 8...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28685886/longitudinal-adaptations-of-bone-mass-geometry-and-metabolism-in-adolescent-male-athletes-the-pro-bone-study
#12
Dimitris Vlachopoulos, Alan R Barker, Esther Ubago-Guisado, Ioannis G Fatouros, Karen M Knapp, Craig A Williams, Luis Gracia-Marco
Adolescence is a crucial period for bone development, and exercise can enhance bone acquisition during this period of life. However, it is not known how the different loading sports practiced can affect bone acquisition in adolescent male athletes. Therefore, the purpose of the present study was to determine the 1-year longitudinal bone acquisition among adolescent males involved in osteogenic (football) and non-osteogenic (swimming and cycling) sports and to compare with active controls. A total of 116 adolescent males aged 12 to 14 years at baseline were followed for 1 year: 37 swimmers, 37 footballers, 28 cyclists, and 14 active controls...
July 7, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28632299/simningsorsakat-lung%C3%A3-dem-vid-svenska-f%C3%A3-rh%C3%A3-llanden-otillr%C3%A3-ckligt-studerat-erfarenheter-fr%C3%A3-n-vansbrosimningen-2016
#13
Annika Braman Eriksson, Martin Annsberg, Maria Hårdstedt
Swimming-induced pulmonary edema (SIPE) has been described in sports and military medicine during strenuous swimming in open water. Symptoms include dyspnea, cough, frothy mucus and hemoptysis. Hypertension, a tight wetsuit, overhydration and previous episodes of SIPE are suggested risk factors. Immediate interruption of swimming prevents more serious symptoms. In the open water race at Vansbro 2016, 69 swimmers (of 13,878 in total) were treated for symptoms suspected for SIPE. Continuous positive airway pressure (CPAP) was successfully used to treat suspected SIPE in 46 patients in the on-site emergency care center...
June 20, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28614998/a-season-of-american-football-is-not-associated-with-changes-in-plasma-tau
#14
Jonathan Oliver, Margaret Jones, Anthony Anzalone, Michele Kirk, David Gable, Justin Repshas, Torie Johnson, Kina Hogland, Kaj Blennow, Henrik Zetterberg
American football athletes are routinely exposed to sub-concussive impacts over the course of the season. This study sought to examine the effect of a season of American football on plasma tau, a potential marker of axonal damage. Nineteen (n =19) National Collegiate Association (NCAA) American football athletes underwent serial blood sampling over the course of the 2014-2015 season at those times in which the number and magnitude of head impacts likely changed. Non-contact, sport-control, NCAA men's swim athletes (n=19) provided a single plasma sample for comparison...
June 14, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28601355/yogic-breathing-practices-improve-lung-functions-of-competitive-young-swimmers
#15
Chirag Sunil Hakked, Ragavendrasamy Balakrishnan, Manjunath Nandi Krishnamurthy
BACKGROUND: Resistive breathing practices are known to improve endurance and performance in competitive swimmers. However, the effect of Pranayama or Yogic Breathing Practices (YBP) in improving respiratory endurance and performance of competitive swimmers remains un-investigated. OBJECTIVES: To study effects of yogic breathing practices on lung functions of swimmers. MATERIAL AND METHODS: Twenty seven national and international competitive swimmers of the age range 13-20 years, with 8...
April 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/28598344/occurrence-of-legionella-in-showers-at-recreational-facilities
#16
Patrizia De Filippis, Cinzia Mozzetti, Massimo Amicosante, Gian Loreto D'Alò, Alessandra Messina, Donatella Varrenti, Roberto Giammattei, Floriana Di Giorgio, Stefania Corradi, Alberto D'Auria, Roberta Fraietta, Rosanna Gabrieli
Critical environments, including water systems in recreational settings, represent an important source of Legionella pneumophila infection in humans. In order to assess the potential risk for legionellosis, we analyzed Legionella contamination of water distribution systems in 36 recreational facilities equipped with swimming pools. One hundred and sixty water samples were analyzed from shower heads or taps located in locker rooms or in bathrooms. By culture method and polymerase chain reaction, 41/160 samples were positive for Legionella from 12/36 recreational centers...
June 2017: Journal of Water and Health
https://www.readbyqxmd.com/read/28591135/bioelectrical-impedance-vector-analysis-biva-for-measuring-the-hydration-status-in-young-elite-synchronized-swimmers
#17
Marta Carrasco-Marginet, Jorge Castizo-Olier, Lara Rodríguez-Zamora, Xavier Iglesias, Ferran A Rodríguez, Diego Chaverri, Daniel Brotons, Alfredo Irurtia
PURPOSE: The assessment of body hydration is a complex process, and no measurement is valid for all situations. Bioelectrical impedance vector analysis (BIVA) has emerged as a relatively novel technique for assessing hydration status in sports. We applied BIVA a) to determine hydration changes evoked by an intense synchronized swimming (SS) training session; b) to characterize the sample of young elite swimmers in relation with a nonathletic reference population; and c) to generate its 50%, 75% and 95% percentiles of the bioelectrical variables...
2017: PloS One
https://www.readbyqxmd.com/read/28552834/high-impact-sport-after-hip-resurfacing-the-ironman-triathlon
#18
J Girard, A Lons, T Pommepuy, R Isida, K Benad, S Putman
BACKGROUND: Returning to high-impact sport is an increasingly frequent functional demand following hip replacement. The literature, however, is sparse on the subject and nonexistent regarding triathlon. We therefore conducted a retrospective study of hip resurfacing in triathlon players, to determine: (1) whether it is possible to return to this kind of sport; (2) if so, whether it is possible to return to the same level; and (3) how a resurfaced hip behaves under these conditions. HYPOTHESIS: Hip resurfacing allows return to competition level in long-distance triathlon...
May 25, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28514233/energy-balance-over-one-athletic-season
#19
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 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...
August 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28505580/factors-affecting-perceived-change-in-physical-activity-in-pregnancy
#20
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
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