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https://www.readbyqxmd.com/read/28432611/comparison-of-human-erythrocyte-purine-nucleotide-metabolism-and-blood-purine-and-pyrimidine-degradation-product-concentrations-before-and-after-acute-exercise-in-trained-and-sedentary-subjects
#1
Wioleta Dudzinska, M Suska, A Lubkowska, K Jakubowska, M Olszewska, K Safranow, D Chlubek
This study aimed at evaluating the concentration of erythrocyte purine nucleotides (ATP, ADP, AMP, IMP) in trained and sedentary subjects before and after maximal physical exercise together with measuring the activity of purine metabolism enzymes as well as the concentration of purine (hypoxanthine, xanthine, uric acid) and pyrimidine (uridine) degradation products in blood. The study included 15 male elite rowers [mean age 24.3 ± 2.56 years; maximal oxygen uptake (VO2max) 52.8 ± 4.54 mL/kg/min; endurance and strength training 8...
April 21, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28422588/alterations-in-redox-homeostasis-during-recovery-from-unexplained-underperformance-syndrome-in-an-elite-international-rower
#2
Nathan A Lewis, Ann Redgrave, Mark Homer, Richard Burden, Wendy Martinson, Brian Moore, Charles R Pedlar
PURPOSE: This case study of an international rower examines a diagnosis of Unexplained Under Performance Syndrome (UUPS or Overtraining Syndrome) describing a full recovery and return to elite competition the same year. METHODS: On diagnosis and 4 and 14 months post-diagnosis, detailed assessments including physiological, nutritional, and biomarkers were made. RESULTS: Clinical examination and laboratory results for haematology, biochemistry, thyroid function, immunology, vitamins and minerals were unremarkable and did not explain the presentation and diagnosis...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28357830/preparation-and-medical-follow-up-for-a-single-handed-transatlantic-rowing-race
#3
Mathieu Carron, Mathieu Coulange, Christophe Dupuy, Pierre Mastalski, Bruno Barberon, Alexis Roullaud, Agnalys Desplantes, Jean-Pierre Auffray
BACKGROUND: A single-handed transatlantic rowing race was organised between Senegal and French Guyana (2600 nautical miles). During the race, rowers adjust their lifestyle to maintain an optimal level of performance. Nutrition, circadian rhythm disturbance, psychological state, pain and other medical problems impact on physical abilities and increase the occurrence of accidents. We surveyed the prevalence of medical complications during this race and the preparation that we could suggest for this kind of activity...
2017: International Maritime Health
https://www.readbyqxmd.com/read/28333705/inhaled-remimazolam-potentiates-inhaled-remifentanil-in-rodents
#4
Tatjana Bevans, Cassandra Deering-Rice, Chris Stockmann, Joseph Rower, Derek Sakata, Christopher Reilly
BACKGROUND: Remimazolam is an ester-based short-acting benzodiazepine currently in clinical trials for IV administration. This study explored the feasibility of delivering remimazolam alone and as an adjunct to remifentanil via inhalation in rodent models. METHODS: Mice were exposed to remimazolam via inhalation; sedation was assessed using time to movement outside a set perimeter. Rats were also exposed to remimazolam aerosol alone and in combination with inhaled remifentanil, and analgesia was quantified by using a tail flick meter...
May 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28296943/new-approaches-to-determine-fatigue-in-elite-athletes-during-intensified-training-resting-metabolic-rate-and-pacing-profile
#5
Amy L Woods, Laura A Garvican-Lewis, Bronwen Lundy, Anthony J Rice, Kevin G Thompson
BACKGROUND: Elite rowers complete a high volume of training across a number of modalities to prepare for competition, including periods of intensified load, which may lead to fatigue and short-term performance decrements. As yet, the influence of substantial fatigue on resting metabolic rate (RMR) and exercise regulation (pacing), and their subsequent utility as monitoring parameters, has not been explicitly investigated in elite endurance athletes. METHOD: Ten National-level rowers completed a four-week period of intensified training...
2017: PloS One
https://www.readbyqxmd.com/read/28278387/12-days-of-altitude-exposure-at-1800m-does-not-increase-resting-metabolic-rate-in-elite-rowers
#6
Amy L Woods, Laura A Garvican-Lewis, Anthony Rice, Kevin Grant Thompson
Four elite rowers completed a twelve-day altitude training camp living at 1800m, and training at 1800m and 915m, to assess changes in resting metabolic rate (RMR). RMR and body composition were assessed PRE and POST-camp. Downward trends in RMR and body composition were observed post-altitude: absolute RMR (percent change: -5.2%), relative RMR (-4.6%), body mass (-1.2%), and fat mass (-4.1%), likely related to the hypoxic stimulus and an imbalance between training load and energy intake.
March 9, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28263414/assessment-of-propulsive-pin-force-and-oar-angle-time-series-using-functional-data-analysis-in-on-water-rowing
#7
John Warmenhoven, Stephen Cobley, Conny Draper, Andrew Harrison, Norma Bargary, Richard Smith
The graphical presentation of the propulsive force applied at the pin plotted relative to the horizontal angle of the oar has been used practically in on-water rowing for the qualitative assessment of skill. How the pattern is related to performance variables has not been well identified, particularly for highly trained sculling athletes. Bivariate functional principal components analysis (bfPCA) was used on force-angle data to identify the main modes of variance in curves representing twenty seven female rowers of different competition levels (national and international level), rowing at 32 strokes per minute in a single scull boat...
March 6, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28261001/effects-of-cranberry-vaccinum-macrocarpon-supplementation-on-iron-status-and-inflammatory-markers-in-rowers
#8
Anna Skarpańska-Stejnborn, Piotr Basta, Jerzy Trzeciak, Alicja Michalska, M Emin Kafkas, Donata Woitas-Ślubowska
BACKGROUND: The aim of this study was to analyze the effect of supplementation with cranberry (Vaccinum macrocarpon) on the levels of pro-inflammatory cytokines, hepcidin and selected markers of iron metabolism in rowers subjected to exhaustive exercise. METHODS: This double-blind study included 16 members of the Polish Rowing Team. The subjects were randomly assigned to the supplemented group (n = 9), receiving 1200 mg of cranberry extract for 6 weeks, or to the placebo group (n = 7)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28249856/imaging-of-rib-stress-fractures-in-elite-rowers-the-promise-of-ultrasound
#9
Alexandra T Roston, Mike Wilkinson, Bruce B Forster
No abstract text is available yet for this article.
March 1, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28246499/energy-systems-efficiency-influences-the-results-of-2-000-m-race-simulation-among-elite-rowers
#10
Stefan Adrian Martin, Valeriu Tomescu
HYPOTHESIS: Energy efficiency within an elite group of athletes will ensure metabolic adaptation during training. OBJECTIVES: To identify energy system efficiency and contribution according to exercise intensity, and performance obtained during a 2,000 m race simulation in an elite group of rowers. METHOD: An observational cross-sectional study was conducted in February 2016 in Bucharest, Romania, on a group of 16 elite rowers. Measurements were performed through Cosmed Quark CPET equipment, and Concept 2 ergometer, by conducting a VO2max test over a standard rowing distance of 2,000 m...
2017: Clujul Medical (1957)
https://www.readbyqxmd.com/read/28242324/suprapostural-effects-of-light-digital-touch-on-the-modulation-of-postural-sway-can-be-modified-by-fingertip-sensitivity
#11
Fu-Chen Chen, Chien-Yu Pan, Jui-Hung Tu, Chia-Liang Tsai, Yao-Chuen Li
We investigated whether the suprapostural effects of light digital touch on the modulation of postural sway can be modifiedby fingertip sensitivity. To achieve this, we recruitedthree types of athleteswith various fingertip sensitivity levels, including swimmers (high sensitivity), basketball players (intermediate sensitivity), and rowers (low sensitivity). We recorded the center of pressure (COP) excursions in 21 swimmers (20.57±0.42years), 22 basketball players (20.79±0.75years), and 22 rowers (20.32±0...
February 24, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28222575/the-effect-of-pacing-strategy-on-physiological-kinetic-and-performance-variables-during-simulated-rowing-ergometer
#12
Eleni Dimakopoulou, Elias Zacharogiannis, Chrysoula Chairopoulou, Socratis Kaloupsis, Theodoros Platanou
BACKGROUND: This study compared the effects of self selected (SSP), negative (NPS) and even (EPS) pacing strategy on performance time, kinetic and physiological variables in overall 2km rowing and in first and second 1km. METHODS: Fifteen male rowers (15.37 ± 1.34 yrs) realized four tests: an incremental test on a rowing ergometer to determine their VO2peak and three experimental 2 km rowing race, where first 1km was manipulated. From SSP a negative pacing strategy, 4% slower than the mean velocity of SSP, and an even pacing strategy (EPS) with mean velocity of SSP, were developed...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28194127/interpersonal-coordination-and-individual-organization-combined-with-shared-phenomenological-experience-in-rowing-performance-two-case-studies
#13
Ludovic Seifert, Julien Lardy, Jérôme Bourbousson, David Adé, Antoine Nordez, Régis Thouvarecq, Jacques Saury
The principal aim of this study was to examine the impact of variability in interpersonal coordination and individual organization on rowing performance. The second aim was to analyze crew phenomenology in order to understand how rowers experience their joint actions when coping with constraints emerging from the race. We conducted a descriptive and exploratory study of two coxless pair crews during a 3000-m rowing race against the clock. As the investigation was performed in an ecological context, we postulated that our understanding of the behavioral dynamics of interpersonal coordination and individual organization and the variability in performance would be enriched through the analysis of crew phenomenology...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28181210/the-differences-in-ecgs-interpretation-in-top-level-athletes
#14
Agnieszka A Jakubiak, Krystyna Burkhard-Jagodzińska, Wojciech Król, Marcin Konopka, Dominik Bursa, Dariusz Sitkowski, Marek Kuch, Wojciech Braksator
BACKGROUND: The Ministry of Health in Poland recommends ECG- based cardiovascular screening in athletes, but so far, there is lack of guidelines on preparticipation assessment. We compared different criteria of ECG screening assessment in the group of top-level athletes. AIMS: The aims were to evaluate the prevalence of ECG changes in athletes that necessitate further cardiological work-up according to three criteria in various age groups as well as to identify factors determining the occurrence of changes related and unrelated to the training...
February 9, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28150178/the-effect-of-concurrent-plyometric-training-versus-submaximal-aerobic-cycling-on-rowing-economy-peak-power-and-performance-in-male-high-school-rowers
#15
Julian D Egan-Shuttler, Rohan Edmonds, Cassandra Eddy, Veronica O'Neill, Stephen J Ives
BACKGROUND: Plyometric training has been shown to increase muscle power, running economy, and performance in athletes. Despite its use by rowing coaches, it is unknown whether plyometrics might improve rowing economy or performance. The purpose was to determine if plyometric training, in conjunction with training on the water, would lead to improved rowing economy and performance. METHODS: Eighteen male high school rowers were assigned to perform 4 weeks of either plyometric training (PLYO, n = 9) or steady-state cycling below ventilatory threshold (endurance, E, n = 9), for 30 min prior to practice on the water (matched for training volume) 3 days per week...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28149413/left-atrial-enlargement-in-young-high-level-endurance-athletes-another-sign-of-athlete-s-heart
#16
Wojciech Król, Ilona Jędrzejewska, Marcin Konopka, Krystyna Burkhard-Jagodzińska, Andrzej Klusiewicz, Andrzej Pokrywka, Jolanta Chwalbińska, Dariusz Sitkowski, Mirosław Dłużniewski, Artur Mamcarz, Wojciech Braksator
Enlargement of the left atrium is perceived as a part of athlete's heart syndrome, despite the lack of evidence. So far, left atrial size has not been assessed in the context of exercise capacity. The hypothesis of the present study was that LA enlargement in athletes was physiological and fitness-related condition. In addition, we tried to assess the feasibility and normal values of left atrial strain parameters and their relationship with other signs of athlete's heart. The study group consisted of 114 international-level rowers (17...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149356/indirect-methods-of-assessing-maximal-oxygen-uptake-in-rowers-practical-implications-for-evaluating-physical-fitness-in-a-training-cycle
#17
Andrzej Klusiewicz, Lech Borkowski, Dariusz Sitkowski, Krystyna Burkhard-Jagodzińska, Beata Szczepańska, Maria Ładyga
The aim of the study was to evaluate the usefulness of indirect methods of assessment of VO2max for estimation of physical capacity of trained male and female rowers during a training cycle. A group of 8 female and 14 male rowers performed the maximal intensity test simulating the regatta distance (a 2 km test) and a submaximal incremental exercise test on a rowing ergometer. The suitability of the indirect methods of predicting VO2max during the training cycle was evaluated by performing the tests twice: in females at an interval of five months and in males at an interval of seven months...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149354/investigating-the-effects-of-typical-rowing-strength-training-practices-on-strength-and-power-development-and-2-000-m-rowing-performance
#18
Thomas Ian Gee, Nicholas Caplan, Karl Christian Gibbon, Glyn Howatson, Kevin Grant Thompson
This study aimed to determine the effects of a short-term, strength training intervention, typically undertaken by club-standard rowers, on 2,000 m rowing performance and strength and power development. Twenty-eight male rowers were randomly assigned to intervention or control groups. All participants performed baseline testing involving assessments of muscle soreness, creatine kinase activity (CK), maximal voluntary contraction (leg-extensors) (MVC), static-squat jumps (SSJ), counter-movement jumps (CMJ), maximal rowing power strokes (PS) and a 2,000 m rowing ergometer time-trial (2,000 m) with accompanying respiratory-exchange and electromyography (EMG) analysis...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28120641/assessment-of-subcutaneous-adipose-tissue-using-ultrasound-in-highly-trained-junior-rowers
#19
Anne Kelso, Emese Trájer, Katja Machus, Gunnar Treff, Wolfram Müller, Jürgen M Steinacker
INTRODUCTION: There is a large variety of body fat (BF) measurements, which differ in validity and reliability. The aim of this study was to measure subcutaneous adipose tissue (SAT) using ultrasound (US) in highly trained junior rowers in a field setting, establish fat patterning profiles, and compare the profiles between male and female athletes. Skinfold thickness (SKF) measurements were also taken and compared to US measurements. METHODS: Sixteen athletes participated...
January 25, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28104245/assessing-kinematics-and-kinetics-of-functional-electrical-stimulation-rowing
#20
Adina E Draghici, Glen Picard, J Andrew Taylor, Sandra J Shefelbine
Hybrid functional electrical stimulation (FES) rowing has positive effects on cardiovascular fitness, producing significantly greater aerobic power than either upper body or FES exercise alone. However, there is minimal information on the kinematics, kinetics, and mechanical efficiency of FES-rowing in the spinal cord injured (SCI) population. This study examined the biomechanics of FES-rowing to determine how motions, forces, and aerobic demand change with increasing intensity. Six individuals with SCI and six able-bodied subjects performed a progressive aerobic capacity rowing test...
February 28, 2017: Journal of Biomechanics
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