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https://www.readbyqxmd.com/read/29190283/sonic-kayaks-environmental-monitoring-and-experimental-music-by-citizens
#1
Amber G F Griffiths, Kirsty M Kemp, Kaffe Matthews, Joanne K Garrett, David J Griffiths
The Sonic Kayak is a musical instrument used to investigate nature and developed during open hacklab events. The kayaks are rigged with underwater environmental sensors, which allow paddlers to hear real-time water temperature sonifications and underwater sounds, generating live music from the marine world. Sensor data is also logged every second with location, time and date, which allows for fine-scale mapping of water temperatures and underwater noise that was previously unattainable using standard research equipment...
November 2017: PLoS Biology
https://www.readbyqxmd.com/read/29169200/-german-language-version-and-validation-of-the-risk-taking-behaviour-scale-rbs-k-for-high-risk-sports
#2
Anika Frühauf, Martin Niedermeier, Gerhard Ruedl, Matthew Barlow, Tim Woodman, Martin Kopp
Background High-risk sports, particularly climbing, kayaking and extreme skiing, have become increasingly popular. The most widely used psychological survey instrument with regard to risk behaviour in sports is the Sensation Seeking Model, mostly assessed by the Sensation Seeking Scale (SSS-V). Until recently, the literature discussed risk behaviour solely through this model. However, this scale does not measure risk-taking behaviours. In contrast, the Risk-Taking Behaviour Scale (RBS-K) is a three-item scale that measures risk behaviour in high-risk sports...
November 23, 2017: Sportverletzung Sportschaden: Organ der Gesellschaft Für Orthopädisch-Traumatologische Sportmedizin
https://www.readbyqxmd.com/read/29160152/effect-of-wetted-surface-area-on-friction-pressure-wave-and-total-drag-of-a-kayak
#3
Beatriz B Gomes, Leandro Machado, Nuno V Ramos, Filipe A V Conceição, Ross H Sanders, Mário A P Vaz, João Paulo Vilas-Boas, David R Pendergast
Using theoretical principles, the components of drag (friction DF, pressure DPR and wave DW) of a single-seat kayak were analysed. The purpose was to examine the effect of changes in wetted surface area due to changes in kayaker's weight and the relative contribution of DF, DPR and DW to the total passive drag as function of velocity. The total passive drag values were based on experimental data collected in a single-seat kayak. Three different kayaker simulated weights were tested - 65, 75 and 85 kg. DF was the drag component that contributed the greatest percentage (between 60 and 68% at 5...
November 21, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28991036/no-effect-of-%C3%AE-alanine-on-muscle-function-and-kayak-performance
#4
Signe Refsgaard Bech, Tobias Schmidt Nielsen, Martin Hald, Jarl Pors Jakobsen, Nikolai Baastrup Nordsborg
PURPOSE: It was investigated if β-alanine supplementation counteracts muscular fatigue development or improves athletic performance. METHODS: Elite kayak rowers (10 males and 7 females) were supplemented with either 80 mg/kg body mass/day β-alanine or placebo for 8 weeks. Muscular fatigue development was investigated by applying a 2 min elbow flexor maximal voluntary contraction (MVC). Electromyography (EMG) was recorded continuously and voluntary activation (VA) was determined 30, 60, 90 and 115 s into the 2 min MVC...
October 5, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28990466/task-dependent-cold-stress-during-expeditions-in-antarctic-environments
#5
Drew M Morris, June J Pilcher, Robert B Powell
This study seeks to understand the degree of body cooling, cold perception and physical discomfort during Antarctic tour excursions. Eight experienced expedition leaders across three Antarctic cruise voyages were monitored during occupational tasks: kayaking, snorkelling and zodiac outings. Subjective cold perception and discomfort were recorded using a thermal comfort assessment and skin temperature was recorded using a portable data logger. Indoor cabin temperature and outdoor temperature with wind velocity were used as measures of environmental stress...
2017: International Journal of Circumpolar Health
https://www.readbyqxmd.com/read/28968153/exergaming-for-individuals-with-spinal-cord-injury-a-pilot-study
#6
Maziah Mat Rosly, Mark Halaki, Hadi Mat Rosly, Victor Cuesta, Nazirah Hasnan, Glen M Davis, Ruby Husain
OBJECTIVE: Commercially available exergames that are for wheelchair-bound individuals with spinal cord injury (SCI) are scarce. This study sought to identify exergames for individuals with SCI that are "dose-potent" for health benefits. MATERIALS AND METHODS: Six participants with SCI were recruited for a pilot study to investigate the exercise intensity of selected exergames (Move Tennis, Move Boxing, and Move Gladiator Duel) for the potential to improve health...
October 2017: Games for Health
https://www.readbyqxmd.com/read/28929926/three-dimensional-kinematic-analysis-and-power-output-of-elite-flat-water-kayakers
#7
Anna Bjerkefors, Olga Tarassova, Johanna S Rosén, Pascal Zakaria, Anton Arndt
The purpose was to examine power output and three-dimensional (3D) kinematic variables in the upper limbs, lower limbs and trunk in elite flat-water kayakers during kayak ergometer paddling. An additional purpose was to analyse possible changes in kinematics with increased intensity and differences between body sides. Six male and four female international level flat-water kayakers participated. Kinematic and kinetic data were collected during three tasks; low (IntL), high (IntH) and maximal (IntM) intensities...
September 20, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28812396/the-influence-of-lower-limb-prostheses-technology-on-paracanoeing-time-trial-performance
#8
Shelley Ellis, Andrew Callaway, Bryce Dyer
Within the Paracanoeing discipline, it is important to ensure that appropriate control is achieved by a paddler with a disability. However, this Paralympic Games discipline has seen very little attention to date. The aims of this study were to understand the kinematic impact to a paracanoeist when not utilizing the use of a prosthetic lower-limb. A kayaker with a uni-lateral transfemoral amputation completed several 200 m maximal efforts both with and without their prosthesis. When the prosthetic limb was removed, there were significant differences found in stroke rate, stroke speed, stroke length and overall power output...
August 16, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28713470/differences-in-anthropometry-biological-age-and-physical-fitness-between-young-elite-kayakers-and-canoeists
#9
Daniel López-Plaza, Fernando Alacid, José María Muyor, Pedro Ángel López-Miñarro
The aim of this study was to determine the anthropometric and physical characteristics of youth elite paddlers and to identify the differences between kayakers and canoeists. A total of 171 male paddlers (eighty-nine kayakers and eighty-two canoeists), aged 13.69 ± 0.57 years (mean ± SD) volunteered to participate in this study. The participants completed basic anthropometric assessments (body mass, stretch stature, sitting height, body mass index, maturity level, sum of 6 skinfolds and fat mass percentage) as well as a battery of physical fitness tests (overhead medicine ball throw, counter movement jump, sit-and-reach and 20 m multi-stage shuttle run tests)...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28708704/shoulder-injuries-in-canoeing-and-kayaking
#10
Philip Holland, Emma Torrance, Lennard Funk
OBJECTIVE: We report the largest case series of shoulder injuries among paddlers so far to establish common mechanisms and patterns of injury. We also discuss how these injuries were managed and report the proportion of paddlers that return to paddlesport. DESIGN: Case series. SETTING: Upper Limb Unit, Wrightington Hospital, United Kingdom. Manchester Arm Clinic, United Kingdom. PATIENTS: Fifty-seven shoulder injuries to professional and recreational paddlers were reviewed at a mean follow-up time of 55 months from the first consultation...
July 11, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28654439/unusual-cause-of-thoracic-wall-pain-in-a-kayaker-a-case-report
#11
Guy Morgan Evans, Gurjit Bhogal
Chest wall injuries are common in paddle-based sports such as kayaking. We present the case of a 46-year-old amateur kayaker who presented with signs and symptoms in keeping with a rib stress response or fracture. The patient failed to respond to conservative management and subsequent imaging revealed an obstructed left kidney with associated hydronephrosis. This case report highlights the importance of considering the wider differential diagnoses when managing athletes participating in paddle-based sports, especially when symptoms fail to settle with appropriate conservative management...
June 22, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28488832/road-to-the-olympics-physical-fitness-of-medalists-of-the-canoe-sprint-junior-european-and-world-championship-events-over-the-past-20-years
#12
Viktor Bielik, Leonard Lendvorský, Lukáš Lengvarský, Peter Lopata, Róbert Petriska, Jana Pelikánová
BACKGROUND: In this article we aimed to find out whether there is a difference in physiological, anthropometric and power variables between medalists in junior international Championship events (MJCH) and the remaining members of the national team (NT) in flat water canoe sprint. METHODS: Sixty male junior kayakers from Slovak NT were tested annually between years 1995 and 2016. Sixteen of them won at least one medal (gold, silver or bronze) at junior international Championship...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28480686/variation-in-plasma-cytokine-concentration-during-a-training-season-in-elite-kayakers
#13
Grasiely Faccin Borges, Luis Rama, Humberto Moreira Carvalho, Joana Gaspar, Amandio Santos, Alain Massart, Beatriz Gomes, Luciele Guerra Minuzzi, Artur Paiva, Ana M Teixeira
BACKGROUND: The purpose of this study was to investigate the differences in cytokines levels in the peripheral blood of kayakers at different moments of training. MATERIALS AND METHODS: The sample comprised 12 elite kayakers preparing for the Beijing Olympic Games. Blood samples were collected at different time points of the training season: baseline (t0 - November) after six week of off-training and before the start of the training season; t1 (January) at week 11 after a period of high-volume training; t2 (April) at week 26 at the end of a period of high intensity training sessions; t3 (June) at week 31 after a competitive period...
May 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28338361/method-induced-differences-of-energy-contributions-in-adolescent-female-kayaking
#14
Yongming Li, Margot Niessen, Xiaoping Chen, Ulrich Hartmann
Purpose Different relative aerobic energy contribution (WAER%) has been reported for the two female Olympic kayaking disciplines (i.e. 200 and 500m). The purpose of this study was to investigate whether the adopted method of energy calculation influenced the value of WAER% during the kayaking time trials. Methods Eleven adolescent female kayakers (age 14±1 yrs, height 172±4 cm, body mass 65.4±4.2 kg, VO2peak 42.6±4.9 ml·min(-1)·kg(-1), training experience 1.5±0.3 yrs) volunteered to participate in one incremental exercise test and two time trials (40s and 120s) on the kayak ergometer...
March 24, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28247725/-prevalence-of-various-urination-disorders-in-residents-of-the-republic-of-dagestan
#15
Yu B Kazilov, Z K Gadzhieva, T M Mugutdinov, B R Kazilov
PURPOSE: to evaluate the prevalence of various urination disorders in residents of the Republic of Dagestan, and, thus, to improve their diagnosis and treatment. MATERIALS AND METHODS: 584 residents (264 men and 320 women) from different regions of the Republic of Dagestan took part in an anonymous questionnaire survey: 165 residents of Makhachkala, including 92 men and 73 women; 86 residents of Derbent and villages of Southern Dagestan, including 30 men and 56 women; 73 residents of Khasavyurt and Kizilyurt, including 34 men and 39 women; 53 residents of Buynaksk, including 19 men and 34 women; 42 residents of Izberbash, including 19 men and 23 women; 58 residents of the Kaspiysk, 29 men and 29 women; 42 residents of Kayakent, 4 men and 38 women; 65 residents of other regions of the Republic of Dagestan (Karabudakhkent, Gumbet, Gunibsk, Shamil, Khunzakh, Botlikh, Kazbek, Levashin, Tlyaratin, and Tsumadin regions), 37 men and 28 women...
August 2016: Urologii︠a︡
https://www.readbyqxmd.com/read/28229134/magnetic-microkayaks-propulsion-of-microrods-precessing-near-a-surface-by-kilohertz-frequency-rotating-magnetic-fields
#16
L O Mair, B A Evans, A Nacev, P Y Stepanov, R Hilaman, S Chowdhury, S Jafari, W Wang, B Shapiro, I N Weinberg
Surface-swimming nano- and micromotors hold significant potential for on-chip mixing, flow generation, sample manipulation, and microrobotics. Here we describe rotating microrods magnetized nearly orthogonally to their long axes. When actuated near a solid surface, these microrods demonstrate precessing motion, with rods describing a double cone similar to the motion of a kayaker's paddle. The precessing motion induces translation. At 1 kHz, these "microkayaks" move at translational velocities of ≈14 μm s(-1) and generate advective flows up to 10 μm s(-1)...
February 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28182506/accuracy-and-validity-of-commercially-available-kayak-ergometers
#17
Thiago Oliveira Borges, Nicola Bullock, David Aitken, Aaron J Coutts
This study compared three commercially available ergometers for within- and between- brand difference to a first principles calibration rig. All ergometers underestimated true mean power with errors of 27.6 ± 3.7%, 4.5 ± 3.5% and 22.5 ± 1.9% for the KayakPro(®), WEBA and Dansprint. Within-brand ergometer power differences ranged from 17 ± 9 to 22 ± 11 W for the KayakPro(®); 3 ± 4 to 4 ±4 W for the WEBA and 5 ± 3 to 5 ± 4 W for the Dansprint. The linear regression analysis showed that most kayak ergometers possess a stable CV (0...
February 9, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28062303/purification-and-characterization-of-bioactive-peptides-ryamide-and-cchamide-in-the-kuruma-shrimp-marsupenaeus-japonicus
#18
Tohru Mekata, Tomoya Kono, Jun Satoh, Morikatsu Yoshida, Kenji Mori, Takahiro Sato, Mikiya Miyazato, Takanori Ida
To understand the regulation systems of appetite, bioactive peptides from the kuruma shrimp Marsupenaeus japonicus (Mj) were isolated and purified by reverse pharmacological assays using CHO cells expressing the Drosophila melanogaster G-protein-coupled receptors (GPCRs) CG5811 (a RYamide receptor) or CG14593 (a CCHamide-2 receptor). Four peptides having binding activity to GPCRs were obtained and named Mj RYamide-1, Mj RYamide-2, Mj RYamide-3, and Mj CCHamide. Genes encoding the prepropeptides of these peptides were identified using kuruma shrimp transcriptome databases...
May 15, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/27918656/aerobic-evaluation-in-elite-slalom-kayakers-using-a-tethered-canoe-system-a-new-proposal
#19
Homero Gustavo Ferrari, Leonardo H D Messias, Ivan G M Reis, Claudio A Gobatto, Filipe A B Sousa, Camila C S Serra, Fúlvia B Manchado-Gobatto
BACKGROUND: Among other aspects, aerobic fitness is indispensable for performance in slalom canoe. PURPOSE: To propose the maximal-lactate steady-state (MLSS) and critical-force (CF) tests using a tethered canoe system as new strategies for aerobic evaluation in elite slalom kayakers. In addition, the relationship between the aerobic parameters from these tests and the kayakers' performances was studied. METHODS: Twelve male elite slalom kayakers from the Brazilian national team participated in this study...
August 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27913635/screening-and-analysis-of-janelia-flylight-project-enhancer-gal4-strains-identifies-multiple-gene-enhancers-active-during-hematopoiesis-in-normal-and-wasp-challenged-drosophila-larvae
#20
Tsuyoshi Tokusumi, Yumiko Tokusumi, Mark S Brahier, Victoria Lam, Jessica R Stoller-Conrad, Paul T Kroeger, Robert A Schulz
A GFP expression screen has been conducted on >1000 Janelia FlyLight Project enhancer-Gal4 lines to identify transcriptional enhancers active in the larval hematopoietic system. A total of 190 enhancers associated with 87 distinct genes showed activity in cells of the third instar larval lymph gland and hemolymph. That is, gene enhancers were active in cells of the lymph gland posterior signaling center (PSC), medullary zone (MZ), and/or cortical zone (CZ), while certain of the transcriptional control regions were active in circulating hemocytes...
February 9, 2017: G3: Genes—Genomes—Genetics
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