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https://www.readbyqxmd.com/read/29140137/v%C3%AC-o2-and-muscle-deoxygenation-kinetics-during-skating-comparison-between-slide-board-and-treadmill-skating
#1
Tatiane Piucco, Rogério Soares, Fernando Diefenthaeler, Guillaume Millet, Juan Murias
PURPOSE: this study aimed to compare the oxygen uptake (V̇O2) kinetics during skating on a treadmill and skating on a slide board and discuss potential mechanisms that might control the V̇O2 kinetics responses during skating. METHODS: breath-by-breath pulmonary V̇O2 and near-infrared spectroscopy-derived muscle deoxygenation ([HHbMb]) were monitored continuously in 12 well-trained young long track speed skaters. On-transient V̇O2 and [HHbMb] responses to skating on a treadmill and skating on a slide board at 80% of the estimated gas exchange threshold were fitted as mono-exponential function...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29127930/indoor-air-quality-of-environments-used-for-physical-exercise-and-sports-practice-systematic-review
#2
REVIEW
Alexandro Andrade, Fábio Hech Dominski
BACKGROUND: Systematic reviews have the potential to contribute substantially to environmental health and risk assessment. OBJECTIVE: This study aimed to investigate indoor air quality of environments used for physical exercise and sports practice through a systematic review. METHODS: The systematic review followed the PRISMA guidelines and was recorded in the PROSPERO registry (CRD42016036057). The search was performed using the SciELO, Science Direct, Scopus, LILACS, MEDLINE via PubMed, and SPORTDiscus databases, from their inception through April 2017...
November 8, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29126337/factors-predicting-lower-leg-chronic-exertional-compartment-syndrome-in-a-large-population
#3
Johan A de Bruijn, Aniek P M van Zantvoort, David van Klaveren, Michiel B Winkes, Marike van der Cruijsen-Raaijmakers, Adwin R Hoogeveen, Joep A W Teijink, Marc R Scheltinga
Knowledge about lower leg chronic exertional compartment syndrome (CECS) is largely obtained from highly selected populations. Patient characteristics may therefore not be appropriate for the general population. Our purpose was to describe a heterogeneous population of individuals suspected of lower leg CECS and to identify predictors of CECS. Charts of individuals who were analyzed for exercise-induced lower leg pain in a referral center between 2001 and 2013 were retrospectively studied. Patients were included if history and physical examination were suggestive of CECS and if they had undergone a dynamic intracompartmental pressure measurement...
November 10, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29035590/the-impact-of-different-competitive-environments-on-pacing-and-performance
#4
Marco J Konings, Florentina J Hettinga
PURPOSE: In real-life competitive situations, athletes are required to continuously make decisions about how and when to invest their available energy resources. This study attempted to identify how different competitive environments invite elite short-track speed skaters to modify their pacing behaviour during head-to-head competition. METHODS: Lap times of elite 500, 1000 and 1500 m short-track speed skating competitions between 2011-2016 (n=34095 races) were collected...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29016475/relationship-between-physiological-off-ice-testing-on-ice-skating-and-game-performance-in-division-i-women-s-ice-hockey-players
#5
Michelle Boland, Emily M Miele, Katie Delude
The purpose was to identify off-ice testing variables that correlate to skating and game performance in Division I collegiate women ice hockey players. Twenty female, forward and defensive players (19.95 ± 1.35 yr) were assessed for weight, height, percent fat mass (%FAT), bone mineral density, predicted one repetition maximum (RM) absolute and relative (REL%) bench press (BP) and hex bar deadlift (HDL), lower body explosive power, anaerobic power, countermovement vertical jump (CMJ), maximum inspiratory pressure (MIP), and on-ice repeated skate sprint (RSS) performance...
October 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28941956/design-and-verification-of-a-simple-3d-dynamic-model-of-speed-skating-which-mimics-observed-forces-and-motions
#6
E van der Kruk, H E J Veeger, F C T van der Helm, A L Schwab
Advice about the optimal coordination pattern for an individual speed skater, could be addressed by simulation and optimization of a biomechanical speed skating model. But before getting to this optimization approach one needs a model that can reasonably match observed behaviour. Therefore, the objective of this study is to present a verified three dimensional inverse skater model with minimal complexity, which models the speed skating motion on the straights. The model simulates the upper body transverse translation of the skater together with the forces exerted by the skates on the ice...
September 14, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28931992/knee-injury-and-osteoarthritis-outcome-score-of-korean-national-ice-hockey-players
#7
Hyeyoung Kim, Sujin Hwang, Byoung-Hee Lee
[Purpose] To investigate sports injuries in Korean national ice hockey players by surveying parts, times, types, frequency, cure, and prevention types of sports injuries and provide basic data for injury prevention and performance improvement of ice hockey players. Another purpose of this study was to evaluate the incidence of ice hockey injuries according to age and the relationship between etiological factors and injuries in high school students. [Subjects and Methods] This was a cross-sectional study. Eighteen female ice hockey players in Korean elite athletes were recruited for this study...
September 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28912656/do-maximal-roller-skiing-speed-and-double-poling-performance-predict-youth-cross-country-skiing-performance
#8
Roland Stöggl, Erich Müller, Thomas Stöggl
The aims of the current study were to analyze whether specific roller skiing tests and cycle length are determinants of youth cross-country (XC) skiing performance, and to evaluate sex specific differences by applying non-invasive diagnostics. Forty-nine young XC skiers (33 boys; 13.8 ± 0.6 yrs and 16 girls; 13.4 ± 0.9 yrs) performed roller skiing tests consisting of both shorter (50 m) and longer durations (575 m). Test results were correlated with on snow XC skiing performance (PXC) based on 3 skating and 3 classical distance competitions (3 to 6 km)...
September 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28902760/common-ice-hockey-injuries-and-treatment-a-current-concepts-review
#9
William Mosenthal, Michael Kim, Robert Holzshu, Bryan Hanypsiak, Aravind Athiviraham
Injuries are common in ice hockey, a contact sport where players skate at high speeds on a sheet of ice and shoot a vulcanized rubber puck in excess of one hundred miles per hour. This article reviews the diagnoses and treatment of concussions, injuries to the cervical spine, and lower and upper extremities as they pertain to hockey players. Soft tissue injury of the shoulder, acromioclavicular joint separation, glenohumeral joint dislocation, clavicle fractures, metacarpal fractures, and olecranon bursitis are discussed in the upper-extremity section of the article...
September 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28882216/biodiversity-life-history-and-conservation-of-northeastern-pacific-chondrichthyans
#10
David A Ebert, Jennifer S Bigman, Julia M Lawson
The sharks, batoids, and chimaeras, collectively the class Chondrichthyes, are one of the most successful groups of fishes, with over 1250 species globally. Recent taxonomic revisions have increased their diversity by about 20% over the past 17 years (2000-2016). The Northeast Pacific Ocean is one of the top 20 most diverse regions/countries on the globe with 77 chondrichthyan species, a number less than a quarter that of the most species-rich area (Australia) but that has increased by 10% since 2000 to include three new species (two skates and a chimaera)...
2017: Advances in Marine Biology
https://www.readbyqxmd.com/read/28868748/egg-cases-of-the-graytail-skate-bathyraja-griseocauda-and-the-cuphead-skate-bathyraja-scaphiops-from-the-south-west-atlantic-ocean
#11
E Mabragaña, D M Vazquez, V Gabbanelli, D Sabadin, S A Barbini, L O Lucifora
Egg cases of Bathyraja griseocauda were larger (140-142 mm in length) than those of Bathyraja scaphiops (88-90 mm in length) and their surface was relatively smooth, without denticles, prickles or any ornamentation. Egg cases of B. scaphiops had a relative coarse surface, covered with prickles of similar size. An identification key for the all described egg cases from Bathyraja occurring in the south-west Atlantic Ocean is provided.
September 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28858060/reliability-of-three-timing-systems-used-to-time-short-on-ice-skating-sprints-in-ice-hockey-players
#12
Colin W Bond, Emily M Willaert, Kyle E Rudningen, Benjamin C Noonan
Speed and acceleration are highly valued in ice hockey and frequently assessed using timing systems. Coaches must use reliable timing systems to assess these attributes, but many systems have not been thoroughly evaluated and the required number of sprint repetitions to obtain the coach's desired degree of reliability for a system may be impractical. This study aimed to compare the reliability of a single photocell (PC), a single laser with a microprocessor (LA), and a digital video camera (VC); and in doing so, evaluate the influence of completing additional sprint repetitions on each systems' reliability...
August 26, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28851492/concentrations-of-mercury-and-other-trace-elements-in-two-offshore-skates-sandy-ray-leucoraja-circularis-and-shagreen-ray-l-fullonica
#13
E E Manuel Nicolaus, Jon Barry, Thi P C Bolam, Pascal Lorance, Florianne Marandel, Sophy R McCully Phillips, Suzanna Neville, Jim R Ellis
Trace metal concentrations in muscle and liver tissues from two offshore species of skate were examined. Concentrations of mercury in muscle of Leucoraja circularis (n=20; 23-110.5cm total length, 157-490m water depth) and L. fullonica (n=24; 28.5-100cm total length, 130-426m water depth) were 0.02-1.8 and 0.04-0.61mgkg(-1), respectively. Concentrations of both As and Hg increased with total length. Only the largest specimen had a concentration of Hg in muscle >1.0mgkg(-1). Data were limited for specimens>90cm long, and further studies on contaminants in larger-bodied skates could usefully be undertaken...
August 26, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28841535/female-reproductive-traits-of-a-commercially-exploited-skate-atlantoraja-platana-g%C3%A3-nther-1880-chondrichthyes-rajidae-ovarian-morphology-gametogenesis-and-microscopic-verification-of-maturity-criteria
#14
A C Moya, A Wehitt, M C Díaz Andrade, E E Di Giacomo, E J Galíndez
Atlantoraja platana is an endemic species of the Southwest Atlantic Ocean, and is one of the most captured by the local bottom trawl industrial fisheries. In this work, the microscopic architecture of mature female's gonads and the dynamics of follicle development are studied as a contribution to raise awareness of reproductive biology of the species. Folliculogenesis depicts the same histologic pattern as in other Elasmobranchs. Follicles in different degrees of maturation coexist in mature animals. The oogonia were only found in immature individuals...
August 12, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28828080/morphological-physiological-and-skating-performance-profiles-of-male-age-group-elite-ice-hockey-players
#15
Maxime Allisse, Pierre Sercia, Alain-Steve Comtois, Mario Leone
The purpose of this study was to describe the evolution of morphological, physiological and skating performance profiles of elite age-group ice hockey players based on repeated measures spread over one season. In addition, the results of fitness tests and training programs performed in off-ice conditions and their relationship with skating performance were analyzed. Eighteen high level age-group ice hockey players (13.1 ± 0.6 years) were assessed off and on-ice at the beginning and at the end of the hockey season...
September 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28816618/ground-reaction-forces-produced-by-two-different-hockey-skating-arm-swing-techniques
#16
Julie Hayward-Ellis, Marion J L Alexander, Cheryl M Glazebrook, Jeff Leiter
The arm swing in hockey skating can have a positive effect on the forces produced by each skate, and the resulting velocity from each push off. The main purpose of this study was to measure the differences in ground reaction forces (GRFs) produced from an anteroposterior versus a mediolateral style hockey skating arm swing. Twenty-four elite-level female hockey players performed each technique while standing on a ground-mounted force platform, and all trials were filmed using two video cameras. Force data was assessed for peak scaled GRFs in the frontal and sagittal planes, and resultant GRF magnitude and direction...
October 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28810132/short-communication-alteration-in-blood-parameters-by-enrofloxacin-in-juvenile-lesser-spotted-dogfish-scyliorhinus-canicula-linnaeus-1758-after-intramuscular-injection
#17
Annalisa Zaccaroni, Marcos Perez-Lopez, Irene de la Casa Resino, Gianfranco Medri, Fabrizio Ceneri, Simone Bertini, Oliviero Mordenti, Luana Cortinovis, Rubina Sirri, Luciana Mandrioli
Enrofloxacin (EF) is a veterinary drug for respiratory, gastrointestinal and urinary tract infections. Parenteral administration at doses higher than the manufacturer recommended dosage has induced cartilage lesions in juvenile mammals and poultry. In elasmobranchs EF is commonly used for the treatment of infectious diseases, however only one study has been performed previously to evaluate pharmacokinetics and the potential chondrotoxicity of a fluoroquinolone in adult skates. In present study juvenile lesser spotted dogfish (Scyliorhinus canicula, Linnaeus, 1758) were treated with low (LD, 5mg/kg) and high dose (HD, 10mg/kg) of EF daily via intramuscular injection for 15 consecutive days, as indicated in a recognized treatment...
August 10, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28796383/self-reported-transvaginal-ultrasound-visualization-of-normal-ovaries-in-postmenopausal-women-is-not-reliable-results-of-expert-review-of-archived-images-in-ukctocs
#18
Will Stott, Stuart Campbell, Angelo Franchini, Oleg Blyuss, Alexey Zaikin, Andy Ryan, Chris Jones, Aleksandra Gentry-Maharaj, Gwendolen Fletcher, Jatinderpal Kalsi, Steve Skates, Max Parmar, Nazar Amso, Ian Jacobs, Usha Menon
OBJECTIVE: In UKCTOCS self-reported visualization rates(srVR) at annual TVS scan was a key quality control(QC) metric. Our objective was to independently assess srVR using expert review and develop software capable of monitoring it. METHODS: Images from 1,000 examinations randomly selected from 68,951 archived annual TVS exams undertaken between 2008-2011 where the ovaries were reported as 'seen and normal' were reviewed by a single expert. Software was developed to identify exact images used to measure ovaries by measuring caliper dimensions and matching them to that recorded by the sonographer...
August 10, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28776703/redescription-and-sexual-dimorphism-of-andaman-leg-skate-cruriraja-andamanica-chondrichthyes-rajiformes-with-comments-on-the-zoogeography-of-the-genus-cruriraja
#19
J Vinu, M P Rajeeshkumar, U V Parmeswaran, K S Sumod, K V Akhilesh, H Manjebrayakath, V N Sanjeevan
This paper redescribes sexually dimorphic Cruriraja andamanica based on five juvenile (four males, one female) and four adult specimens (three males, one female) collected from Andaman waters. Morphometric comparison of the present specimens with a female specimen collected off the coast of Tanzania reveals considerable dissimilarities between them. These findings, along with the wide geographical distance between collection locations, support a need for revision of the Tanzanian specimen, which, in all probability, represents a new species in the genus...
August 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28771061/comparison-of-performance-levels-and-sex-on-sprint-race-performance-in-the-biathlon-world-cup
#20
Harri Luchsinger, Jan Kocbach, Gertjan Ettema, Øyvind Sandbakk
Biathlon is an Olympic sport combining cross-country skiing with the skating technique and rifle shooting. The sprint (7.5 km for women and 10 km for men) includes two shootings between the three laps of skiing. The aims of the current study are to compare biathletes of different performance-levels and sex on total race time and performance-determining factors of sprint races in the biathlon World Cup. The top 10-performers (G1-10) and results within rank 21-30 (G21-30) in 47 sprint races during the 2011/2012 to 2015/2016 World Cup seasons were compared regarding total race time, course time, shooting time, range time, shooting performance (rate of hits) and penalty time...
August 3, 2017: International Journal of Sports Physiology and Performance
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