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https://www.readbyqxmd.com/read/29473785/muscle-morphology-of-the-vastus-lateralis-is-strongly-related-to-ergometer-performance-sprint-capacity-and-endurance-capacity-in-olympic-rowers
#1
Stephan van der Zwaard, Guido Weide, Koen Levels, Michelle R I Eikelboom, Dionne A Noordhof, Mathijs J Hofmijster, Willem J van der Laarse, Jos J de Koning, Cornelis J de Ruiter, Richard T Jaspers
Rowers need to combine high sprint and endurance capacities. Muscle morphology largely explains muscle power generating capacity, however, little is known on how muscle morphology relates to rowing performance measures. The aim was to determine how muscle morphology of the vastus lateralis relates to rowing ergometer performance, sprint and endurance capacity of Olympic rowers. Eighteen rowers (12♂, 6♀, who competed at 2016 Olympics) performed an incremental rowing test to obtain maximal oxygen consumption, reflecting endurance capacity...
February 23, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29467598/an-attempt-to-induce-an-immunomodulatory-effect-in-rowers-with-spirulina-extract
#2
Artur Juszkiewicz, Piotr Basta, Elżbieta Petriczko, Bogusław Machaliński, Jerzy Trzeciak, Karolina Łuczkowska, Anna Skarpańska-Stejnborn
Background: The aim of this study was to analyze the response of selected components of the immune system in rowers to maximal physical exercise, and to verify if this response can be modulated by supplementation with spirulina (cyanobacterium Spirulina platensis ) . Method: The double-blind study included 19 members of the Polish Rowing Team. The subjects were randomly assigned to the supplemented group ( n  = 10), receiving 1500 mg of spirulina extract for 6 weeks, or to the placebo group ( n  = 9)...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29465607/the-efficacy-of-heart-rate-variability-in-tracking-travel-and-training-stress-in-youth-female-rowers-a-preliminary-study
#3
Julian D Egan-Shuttler, Rohan Edmonds, Stephen J Ives
(248 words)Heart rate (HR) variability (HRV) is a reliable indicator of cardiac parasympathetic activity and has been used in athletic populations to measure training adaptations. To date, there is limited research showing whether HRV is practical in youth female athletes and rowers during short periods of overload training. PURPOSE: The purpose of this study was to evaluate the practicality of HRV in documenting training responses during a period of overload training in youth female rowers...
February 15, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29452353/a-diagnostic-germ-cell-score-for-immature-testicular-tissue-at-risk-of-germ-cell-loss
#4
L Heckmann, D Langenstroth-Röwer, T Pock, J Wistuba, J-B Stukenborg, M Zitzmann, S Kliesch, S Schlatt, N Neuhaus
STUDY QUESTION: Can a systematic scoring procedure provide crucial information on the status of highly heterogeneous immature human testicular tissues in the context of cryopreservation for fertility preservation? SUMMARY ANSWER: We developed a systematic histological score as a novel diagnostic tool which differentiates the patient cohort according to the status of germ cell differentiation and number of spermatogonia (normal, diminished and absent), and which could be relevant in the fertility clinic...
February 14, 2018: Human Reproduction
https://www.readbyqxmd.com/read/29450135/development-of-a-specific-index-to-detect-malnutrition-in-athletes-validity-in-weight-class-or-intermittent-fasted-athletes
#5
François D Desgorces, Christophe Moinard, Mounir Chennaoui, Jean-François Toussaint, Cyril Petibois, Philippe Noirez
Fasted or weight-category athletes manage their training under strict diet conditions that could impair the stress-recovery balance and result in acute or chronic fatigue. However, to date, no validated biomarker are available to quantify this phenomena. The aim of this study was to assess the validity of a specific index combining plasma albumin and weight change to detect nutrition-related risks of fatigue increase and under-performance in athletes experiencing particular nutritional conditions. An athlete's nutrition risk index (ANRI) equation, based on data from lightweight and heavyweight rowers, was developed using relationship between plasma albumin concentrations combined to weight changes with sport performance and overtraining scores and was tested by odds ratio for failure...
June 2017: Biochimie open
https://www.readbyqxmd.com/read/29448350/role-of-spatial-heterogeneity-in-the-collective-dynamics-of-cilia-beating-in-a-minimal-one-dimensional-model
#6
Supravat Dey, Gladys Massiera, Estelle Pitard
Cilia are elastic hairlike protuberances of the cell membrane found in various unicellular organisms and in several tissues of most living organisms. In some tissues such as the airway tissues of the lung, the coordinated beating of cilia induces a fluid flow of crucial importance as it allows the continuous cleaning of our bronchia, known as mucociliary clearance. While most of the models addressing the question of collective dynamics and metachronal wave consider homogeneous carpets of cilia, experimental observations rather show that cilia clusters are heterogeneously distributed over the tissue surface...
January 2018: Physical Review. E
https://www.readbyqxmd.com/read/29361644/correction-relationship-between-force-velocity-profiles-and-1-500-m-ergometer-performance-in-young-rowers
#7
Caroline Giroux, Hugo Maciejewski, Amal Ben-Abdessamie, Frédéric Chorin, Julien Lardy, Sebastien Ratel, Abderrahmane Rahmani
No abstract text is available yet for this article.
November 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29352279/girls-in-the-boat-sex-differences-in-rowing-performance-and-participation
#8
Kevin G Keenan, Jonathon W Senefeld, Sandra K Hunter
Men outperform women in many athletic endeavors due to physiological and anatomical differences (e.g. larger and faster muscle); however, the observed sex differences in elite athletic performance are typically larger than expected, and may reflect sex-related differences in opportunity or incentives. As collegiate rowing in the United States has been largely incentivized for women over the last 20 years, but not men, the purpose of this study was to examine sex differences in elite rowing performance over that timeframe...
2018: PloS One
https://www.readbyqxmd.com/read/29341517/proliferative-myositis-of-the-latissimus-dorsi-presenting-in-a-20-year-old-male-athlete
#9
N McHugh, R Tevlin, C Beggan, D J Ryan, J Larkin, F Moloney, M W Bennett, J Kelly
We describe the case of a 20-year-old rower presenting with an uncommon condition of Proliferative Myositis (PM) affecting the Latissimus Dorsi (LD). PM is a rare, benign tumour infrequently developing in the upper back. Its rapid growth and firm consistency may mistake it for sarcoma at presentation. Therefore, careful multidisciplinary work-up is crucial, and should involve appropriate radiological and histopathological investigations. Here, we propose the aetiology of LD PM to be persistent myotrauma induced by repetitive rowing motions...
August 8, 2017: Irish Medical Journal
https://www.readbyqxmd.com/read/29340006/the-impact-of-the-progressive-efficiency-test-on-a-rowing-ergometer-on-white-blood-cells-distribution-and-clinical-chemistry-changes-in-paralympic-rowers-during-the-preparatory-stage-before-the-paralympic-games-in-rio-2016-a-case-report
#10
Robert Nowak, Rafał Buryta, Krzysztof Krupecki, Tomasz Zając, Marek Zawartka, Patrizia Proia, Dorota Kostrzewa-Nowak
There is a large gap in knowledge regarding research on post-exercise blood changes in disabled athletes. There are relatively few data on adaptive mechanisms to exercise in disabled athletes, including disabled rowers. Two rowers from a Polish adaptive rowing settle TAMix2x that qualified for the Paralympic Games in Rio, 2016 took part in this study. They performed a progressive test on a rowing ergometer until exhaustion. The cardiorespiratory fitness measures, complete blood count, white blood cells' distribution and 30 clinical chemistry variables describing laboratory diagnostic profiles and general health were determined...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29259810/capturing-effort-and-recovery-reactive-and-recuperative-cortisol-responses-to-competition-in-well-trained-rowers
#11
Victor L Kallen, Janine H Stubbe, Henk Jan Zwolle, Pierre Valk
Background/aim: It is well known that physical strain is associated with increased cortisol production. And although mental stress elevates cortisol concentrations as well, little is known of the independent and/or combined effects of both on the secretion of cortisol. Aim of the study was to investigate the day-to-day cortisol dynamics associated with training, performance and recuperation and the immediate responses to mental stress and physical endurance under competitive conditions...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29222948/force-coordination-strategies-in-on-water-single-sculling-are-asymmetries-related-to-better-rowing-performance
#12
John Warmenhoven, Richard Smith, Conny Draper, Andrew Harrison, Norma Bargary, Stephen Cobley
Asymmetries of the rowing stroke cycle have been assessed with reference to kinematics and foot-force measures in laboratory testing environments. It remains unclear how asymmetries in propulsive kinetic measures are related to on-water rowing performance. A new approach for the evaluation of both global and local asymmetries across the entire movement was used to assess the continuous role of asymmetries and whether these change according to level of competitive representation. Twenty seven highly skilled female rowers (national and international competition level), rowing at 32 strokes per minute in a single scull boat were evaluated...
December 9, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29209662/prehistoric-women-s-manual-labor-exceeded-that-of-athletes-through-the-first-5500-years-of-farming-in-central-europe
#13
Alison A Macintosh, Ron Pinhasi, Jay T Stock
The intensification of agriculture is often associated with declining mobility and bone strength through time, although women often exhibit less pronounced trends than men. For example, previous studies of prehistoric Central European agriculturalists (~5300 calibrated years BC to 850 AD) demonstrated a significant reduction in tibial rigidity among men, whereas women were characterized by low tibial rigidity, little temporal change, and high variability. Because of the potential for sex-specific skeletal responses to mechanical loading and a lack of modern comparative data, women's activity in prehistory remains difficult to interpret...
November 2017: Science Advances
https://www.readbyqxmd.com/read/29191982/case-studies-in-physiology-exercise-induced-diaphragm-fatigue-in-a-paralympic-champion-rower-with-spinal-cord-injury
#14
Nicholas B Tiller, Thomas R Aggar, Christopher R West, Lee M Romer
INTRODUCTION: The aim of this case report was to determine whether maximal upper-body exercise was sufficient to induce diaphragm fatigue in a Paralympic champion adaptive rower with low-lesion spinal cord injury (SCI). CASE PRESENTATION: An elite arms-only oarsman (age 28 y, stature 1.89 m, mass 90.4 kg) with motor-complete SCI (T12) performed a 1000 m time-trial on an adapted rowing ergometer. Exercise measurements comprised pulmonary ventilation and gas exchange, diaphragm EMG-derived indices of neural respiratory drive and intrathoracic pressure-derived indices of respiratory mechanics...
November 30, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29177199/predicting-tacrolimus-concentrations-in-children-receiving-a-heart-transplant-using-a-population-pharmacokinetic-model
#15
Joseph E Rower, Chris Stockmann, Matthew W Linakis, Shaun S Kumar, Xiaoxi Liu, E Kent Korgenski, Catherine M T Sherwin, Kimberly M Molina
Objective: Immunosuppressant therapy plays a pivotal role in transplant success and longevity. Tacrolimus, a primary immunosuppressive agent, is well known to exhibit significant pharmacological interpatient and intrapatient variability. This variability necessitates the collection of serial trough concentrations to ensure that the drug remains within therapeutic range. The objective of this study was to build a population pharmacokinetic (PK) model and use it to determine the minimum number of trough samples needed to guide the prediction of an individual's future concentrations...
2017: BMJ Paediatrics Open
https://www.readbyqxmd.com/read/29162638/the-relationship-between-pectoral-fin-ray-stiffness-and-swimming-behavior-in-labridae-insights-into-design-performance-and-ecology
#16
Brett R Aiello, Adam R Hardy, Chery Cherian, Aaron M Olsen, Sihyun E Ahn, Melina E Hale, Mark W Westneat
The functional capabilities of flexible, propulsive, appendages are directly influenced by their mechanical properties. The fins of fishes have undergone extraordinary evolutionary diversification in structure and function, which raises questions of how fin mechanics relate to swimming behavior. In the fish family Labridae, pectoral fin swimming behavior ranges from rowing to flapping. Rowers are more maneuverable than flappers, but flappers generate greater thrust at high speeds and achieve greater mechanical efficiency at all speeds...
November 21, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29156368/self-and-team-prioritisation-effects-in-perceptual-matching-evidence-for-a-shared-representation
#17
Florence Enock, Jie Sui, Miles Hewstone, Glyn W Humphreys
Previous research has demonstrated that in-group favouritism occurs not only in higher-level judgments such as reward allocation, but also in low-level perceptual and attentional tasks. Recently, Moradi, Sui, Hewstone, and Humphreys (2015) found a novel effect of in-group bias on a simple perceptual matching task in which football fans responded more efficiently to stimuli newly associated with their own football team than stimuli associated with rival or neutral teams. This result is consistent with a robust self-bias effect in which individuals show a large performance advantage in responding to stimuli associated with the self over stimuli associated with a close friend or a stranger (Sui, He, & Humphreys, 2012)...
November 17, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/29148129/development-of-functional-electrical-stimulation-rowing-the-rowstim-series
#18
Brian Andrews, Robin Gibbons, Garry Wheeler
Potentially, functional electrical stimulation (FES)-assisted exercise may have an important therapeutic role in reducing comorbidities associated with spinal cord injury (SCI). Here, we present an overview of these secondary life-threatening conditions, discuss the rationale behind the development of a hybrid exercise called FES rowing, and describe our experience in developing FES rowing technology. FES rowing and sculling are unique forms of adaptive rowing for those with SCI. The paralyzed leg musculature is activated by multiple channels of electrical pulses delivered via self-adhesive electrodes attached to the skin...
November 2017: Artificial Organs
https://www.readbyqxmd.com/read/29143667/validation-of-whole-blood-transcriptome-signature-during-microdose-recombinant-human-erythropoietin-rhuepo-administration
#19
Guan Wang, Jérôme Durussel, Jonathan Shurlock, Martin Mooses, Noriyuki Fuku, Georgie Bruinvels, Charles Pedlar, Richard Burden, Andrew Murray, Brendan Yee, Anne Keenan, John D McClure, Pierre-Edouard Sottas, Yannis P Pitsiladis
BACKGROUND: Recombinant human erythropoietin (rHuEpo) can improve human performance and is therefore frequently abused by athletes. As a result, the World Anti-Doping Agency (WADA) introduced the Athlete Biological Passport (ABP) as an indirect method to detect blood doping. Despite this progress, challenges remain to detect blood manipulations such as the use of microdoses of rHuEpo. METHODS: Forty-five whole-blood transcriptional markers of rHuEpo previously derived from a high-dose rHuEpo administration trial were used to assess whether microdoses of rHuEpo could be detected in 14 trained subjects and whether these markers may be confounded by exercise (n = 14 trained subjects) and altitude training (n = 21 elite runners and n = 4 elite rowers, respectively)...
November 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29132012/distinct-ezrin-truncations-differentiate-metastases-in-sentinel-lymph-nodes-from-unaffected-lymph-node-tissues-from-primary-breast-tumors-and-from-healthy-glandular-breast-tissues
#20
Claudia Röwer, Christian George, Toralf Reimer, Bernd Stengel, Anngret Radtke, Bernd Gerber, Michael O Glocker
BACKGROUND: Lymph node metastasis status is a prognostic factor for further lymph node involvement and for patient survival in breast cancer patients. Frozen section analysis of lymph nodes is a reliable method for detection of macro-metastases. However, this method is far less effective in detecting micro-metastases, requesting improved diagnostic procedures. METHODS: We investigated expression and truncation of ezrin in (i) sentinel lymph node metastases, (ii) unaffected axillary lymph nodes, (iii) primary breast tumors, and (iv) healthy glandular breast tissues using 2D gel electrophoresis, SDS-PAGE, and mass spectrometry in addition to Western blotting...
November 10, 2017: Translational Oncology
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