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https://www.readbyqxmd.com/read/27871205/the-effects-of-two-different-swimming-training-periodization-on-physiological-parameters-at-various-exercise-intensities
#1
Vicente Javier Clemente-Suárez, Athanasios Dalamitros, João Ribeiro, Ana Sousa, Ricardo J Fernandes, J Paulo Vilas-Boas
This study analysed the effects of two different periodization strategies on physiological parameters at various exercise intensities in competitive swimmers. Seventeen athletes of both sexes were divided to two groups, the traditional periodization (TPG, n = 7) and the reverse periodization group (RPG, n = 10). Each group followed a 10-week training period based on the two different periodization strategies. Before and after training, swimming velocity (SV), energy expenditure (EE), energy cost (EC) and percentage of aerobic (%Aer) and anaerobic (%An) energy contribution to the swimming intensities corresponding to the aerobic threshold (AerT), the anaerobic threshold (AnT) and the velocity at maximal oxygen uptake (vVO2max) were measured...
November 21, 2016: European Journal of Sport Science
https://www.readbyqxmd.com/read/27788589/improved-reliability-of-the-urine-lactate-concentration-under-controlled-hydration-after-maximal-exercise
#2
Stefanos Nikolaidis, Ioannis Kosmidis, Triantafullia Koulidou, Sotiris Panagakis, George Tsalis, Dimitris Loupos, Vassilis Mougios
CONTEXT: Urine lactate may be a novel biomarker of lactate production capacity but its reliability has been unsatisfactory so far. OBJECTIVE: To compare the reliability of urine lactate between controlled hydration and no hydration after maximal exercise. MATERIAL AND METHODS: Athletes performed swimming exercise four times: two followed by consumption of 1 L of water and two followed by no water intake. Blood and urine lactate was measured...
October 28, 2016: Biomarkers: Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
https://www.readbyqxmd.com/read/27766021/dehydroepiandrosterone-supplementation-combined-with-whole-body-vibration-training-affects-testosterone-level-and-body-composition-in-mice
#3
Wen-Chyuan Chen, Yi-Ming Chen, Chi-Chang Huang, Yen-Dun Tzeng
Dehydroepiandrosterone (DHEA), the most abundant sex steroid, is primarily secreted by the adrenal gland and a precursor hormone used by athletes for performance enhancement. Whole-body vibration (WBV) is a well-known light-resistance exercise by automatic adaptations to rapid and repeated oscillations from a vibrating platform, which is also a simple and convenient exercise for older adults. However, the potential effects of DHEA supplementation combined with WBV training on to body composition, exercise performance, and hormone regulation are currently unclear...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27736252/heart-rate-recovery-after-warm-up-in-swimming-a-useful-predictor-of-training-heart-rate-response
#4
Sander P M Ganzevles, Arnold de Haan, Peter J Beek, Hein A M Daanen, Martin J Truijens
For training to be optimal, daily training load has to be adapted to the momentary status of the individual athlete, which is often difficult to establish. Therefore, the present study was performed to investigate the predictive value of heart rate recovery (HRR) during a standardized warm-up for training load. Training load was quantified by the variation in heart rate during standardized training in competitive swimmers. Eight female and five male swimmers of Dutch national level participated in the study...
October 13, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27727200/combined-strength-exercises-in-dry-land-and-in-the-water-to-improve-swimming-parameters-of-athletes-with-paraplegia
#5
Kestutis Skucas, Vaida Pokvytyte
BACKGROUND: Of the research was to examine the effects of twelve weeks of combined dry land strength and resistance swimming training for increasing upper body strength, swimming performance and stroking parameters in swimmers with paraplegia and to determine correlation between these parameters. METHODS: The preliminary, the second (after 4 weeks), the third (after 8 weeks) and the last (after 12 weeks) testing were performed. The measurements consisted of the following assessments: the assessment of isometric strength in dry land (tension force), the assessment of swimming performance and stroke parameters during 50m backstroke, the assessment of strength during tethered swimming (tension force)...
October 11, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27717653/the-time-dependence-of-the-effect-of-ischemic-preconditioning-on-successive-sprint-swimming-performance
#6
Felipe D Lisbôa, Tiago Turnes, Rogério S O Cruz, João A G Raimundo, Gustavo S Pereira, Fabrizio Caputo
OBJECTIVES: The present study aimed to determine the effects of ischemic preconditioning on performance in three successive 50-m swimming trials and to measure stroke rate, stroke length and blood lactate accumulation. DESIGN: Counterbalanced, repeated-measures cross-over study. METHODS: On two separate days, eleven competitive male swimmers (20±3 years, 182±5cm, 77±5kg) performed three successive 50-m trials in a 50-m swimming pool, preceded by intermittent bilateral cuff inflation (4× 5-min of blood flow restriction+5-min of cuff deflation) at either 220 for thighs and 180mmHg for arms (ischemic preconditioning) or 20mmHg for both limbs (control-treatment)...
September 20, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27703854/sex-differences-in-pacing-during-ultraman-hawaii
#7
Beat Knechtle, Pantelis T Nikolaidis
BACKGROUND: To date, little is known for pacing in ultra-endurance athletes competing in a non-stop event and in a multi-stage event, and especially, about pacing in a multi-stage event with different disciplines during the stages. Therefore, the aim of the present study was to examine the effect of age, sex and calendar year on triathlon performance and variation of performance by events (i.e., swimming, cycling 1, cycling 2 and running) in 'Ultraman Hawaii' held between 1983 and 2015...
2016: PeerJ
https://www.readbyqxmd.com/read/27669185/examining-fundamental-movement-competency-and-closed-chain-upper-extremity-dynamic-balance-in-swimmers
#8
Garrett S Bullock Spt, Nate Brookerson, Amy M Knab, Robert J Butler
Abnormal fundamental movement patterns and upper quarter dynamic balance are proposed mechanisms affecting athletic performance and injury risk. There are few studies investigating functional movement and closed chain upper extremity dynamic stability in swimmers. The purpose of this study was to determine differences in fundamental movement competency and closed chain upper extremity dynamic balance, utilizing the Functional Movement Screen (FMS) and Upper Quarter Y-Balance Test (YBT-UQ), of high school (HS; n=70) and collegiate (COL; n=70) swimmers...
September 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27634070/developing-and-testing-an-instrument-to-assess-aquaticity-in-humans
#9
Danae Varveri, Andreas D Flouris, Nikitas Smirnios, Elizana Pollatou, Christina Karatzaferi, Giorgos K Sakkas
We developed and validated an aquaticity assessment test (AAT) for the evaluation of human physical adequacy in the water. Forty-six volunteers (25M/21F; 20 ± 8 years) participated and performed 10 easy-to-administer and practical aquatic tasks. Group A was formed by 36 elite athletes (M/F 20/16, 24.7 ± 10yrs) from two sports categories depending on their affinity to the water environment: terrestrial (wrestling, cycling, dancing) and aquatic (swimming, synchronized swimming, free diving) sports. Group B was formed by 10 non-athlete participants (5M/5F, 14...
July 2016: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/27632832/assessment-of-body-composition-and-sport-performance-of-brazilian-paralympic-swimming-team-athletes
#10
Radamés Maciel Vítor Medeiros, Eduardo da Silva Alves, Valdir de Aquino Lemos, Paulo Adriano Schwingel, Andressa da Silva, Roberto Vital, Alexandre Silva Vieira, Murilo Moreira Barreto, Edilson Alves da Rocha, Sergio Tufik, Marco Túlio de Mello
CONTEXT: Body composition assessments of high-performance athletes are very important for identifying physical performance potential. Although the relationship between the kinanthropometric characteristics and performance abilities of Olympic swimmers is extremely important, this subject is not completely understood for Paralympic swimmers. OBJECTIVE: To investigate the relationship between body composition and sport performance in Brazilian Paralympic swimmers 6 months after training...
August 24, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27604138/performance-and-sex-differences-in-isklar-norseman-xtreme-triathlon
#11
Beat Knechtle, Pantelis Theodoros Nikolaidis, Michael Stiefel, Thomas Rosemann, Christoph Alexander Rüst
The performance and sex differences of long-distance triathletes competing in 'Ironman Hawaii' are well investigated. However, less information is available with regards to triathlon races of the Ironman distance held under extreme environmental conditions (e.g. extreme cold) such as the 'Isklar Norseman Xtreme Triathlon' which started in 2003. In 'Isklar Norseman Xtreme Triathlon', athletes swim at a water temperature of ~13-15°C, cycle at temperatures of ~5-20°C and run at temperatures of ~12-28°C in the valley and of ~2-12°C at Mt...
October 31, 2016: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/27552213/evaluation-of-the-effectiveness-of-compression-garments-on-autonomic-nervous-system-recovery-following-exercise
#12
Alessandro Piras, Giorgio Gatta
The aim of this investigation was to evaluate the recovery pattern of a whole body compression garment on hemodynamic parameters and on ANS activity following a swimming performance. Ten young male athletes were recruited and tested in two different days, with and without wearing the garment during the recovery phase. After a warm-up of 15 minutes, athletes were instructed to perform a maximal 400m freestyle swimming event, and then time series of beat-to-beat intervals for heart rate variability (HRV), baroreflex sensitivity (BRS), and hemodynamic parameters were recorded for 90 minutes of recovery...
August 19, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27513846/action-sport-cameras-as-an-instrument-to-perform-a-3d-underwater-motion-analysis
#13
Gustavo R D Bernardina, Pietro Cerveri, Ricardo M L Barros, João C B Marins, Amanda P Silvatti
Action sport cameras (ASC) are currently adopted mainly for entertainment purposes but their uninterrupted technical improvements, in correspondence of cost decreases, are going to disclose them for three-dimensional (3D) motion analysis in sport gesture study and athletic performance evaluation quantitatively. Extending this technology to sport analysis however still requires a methodologic step-forward to making ASC a metric system, encompassing ad-hoc camera setup, image processing, feature tracking, calibration and 3D reconstruction...
2016: PloS One
https://www.readbyqxmd.com/read/27504176/anthropometric-profiling-of-new-zealand-junior-elite-triathletes
#14
Bhargav Dave, Asmi Dave, Nilesh Kotecha, Myrtle Oates
INTRODUCTION: The triathlon involves a combination of three separate disciplines-swimming, cycling and running. To date, very few studies have been conducted on the anthropometric characteristics of the New Zealand junior elite triathletes. The aim of this study was to determine the correlation between physical traits of calf girth or sum of eight skinfolds (anthropometry) and running or cycling performances in the triathlon event. METHODS: Eleven junior elite triathletes (6 females, 5 males; (Av...
June 2016: Electronic Physician
https://www.readbyqxmd.com/read/27497636/protective-effects-of-the-roots-of-angelica-sinensis-on-strenuous-exercise-induced-sports-anemia-in-rats
#15
Chih-Wei Chang, Yi-Ming Chen, Yi-Ju Hsu, Chi-Chang Huang, Yu-Tse Wu, Mei-Chich Hsu
ETHNOPHARMACOLOGICAL RELEVANCE: Sports anemia is a persistent and severe problem in athletes owing to strenuous exercise-induced oxidative stress and hepcidin upregulation. The roots of Angelica sinensis (AS), a familiar traditional Chinese medicine, has been used for replenishing blood since antiquity. AIM OF THE STUDY: To evaluate the effects of ethanolic AS extract in a 4-week study on sports anemia in female Wistar rats. MATERIALS AND METHODS: To induce anemia, a strenuous exercise protocol consisting of running and swimming was employed with increasing intensity...
August 3, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27496929/centenarian-athletes-examples-of-ultimate-human-performance
#16
Romuald Lepers, Paul J Stapley, Thomas Cattagni
BACKGROUND: some centenarians are engaged in regular physical activity and sometimes in sporting events. OBJECTIVE: we aimed to identify world records of centenarian athletes in several sports and determine which represented the best performance when compared to all-age world records, all disciplines taken together. METHODS: all of the best performances achieved by centenarians were identified and compared in three disciplines: athletics, swimming and cycling...
September 2016: Age and Ageing
https://www.readbyqxmd.com/read/27486491/pulmonary-aspects-of-exercise-and-sports
#17
Alfred A Bove
Although the lungs are a critical component of exercise performance, their response to exercise and other environmental stresses is often overlooked when evaluating pulmonary performance during high workloads. Exercise can produce capillary leakage, particularly when left atrial pressure increases related to left ventricular (LV) systolic or diastolic failure. Diastolic LV dysfunction that results in elevated left atrial pressure during exercise is particularly likely to result in pulmonary edema and capillary hemorrhage...
April 2016: Methodist DeBakey Cardiovascular Journal
https://www.readbyqxmd.com/read/27464417/polymorphism-of-the-igf-i-system-and-sports-performance
#18
REVIEW
Sigal Ben-Zaken, Yoav Meckel, Dan Nemet, Nitzan Dror, Alon Eliakim
The potential use genetic polymorphism, and in particularly polymorphism of hormone genes, as tool to predict athletic performance is currently very challenging. Recent studies suggest that single nucleotide polymorphisms in IGF-I and myostatin may be beneficial for endurance and short distance running, and may even be associated with elite performance. Polymorphism in IGF-I receptor may differentiate between the two edges of the endurance-power athletic performance running spectrum suggesting beneficial effects for endurance and prevent from success in power events...
June 2016: Pediatric Endocrinology Reviews: PER
https://www.readbyqxmd.com/read/27460127/environmental-influence-on-the-prevalence-and-pattern-of-airway-dysfunction-in-elite-athletes
#19
Irisz Karolina Levai, James H Hull, Mike Loosemore, Jon Greenwell, Greg Whyte, John W Dickinson
BACKGROUND AND OBJECTIVE: Elite swimming and boxing require athletes to achieve relatively high minute ventilation. The combination of a sustained high ventilation and provocative training environment may impact the susceptibility of athletes to exercise-induced bronchoconstriction (EIB). The purpose of this study was to evaluate the prevalence of EIB in elite Great British (GB) boxers and swimmers. METHODS: Boxers (n = 38, mean age: 22.1 ± 3.1 years) and swimmers (n = 44, mean age: 21...
November 2016: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/27428675/impact-of-a-short-term-water-abstinence-on-airway-hyperresponsiveness-in-elite-swimmers
#20
Philipp Bohm, Anne Hecksteden, Tim Meyer
OBJECTIVE: To investigate the effect of a swimming break on airway hyperresponsiveness (AHR) and to evaluate perception of bronchoconstriction-related symptoms after methacholine challenge testing (MCT). DESIGN: Observational, controlled study. SETTING: University department. PARTICIPANTS: Overall, 25 healthy, elite, competitive swimmers aged ≥14 years from the local Olympic training center and 25 healthy control subjects...
July 15, 2016: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
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