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https://www.readbyqxmd.com/read/29305660/psychophysiological-body-composition-biomechanical-and-autonomic-modulation-analysis-procedures-in-an-ultraendurance-mountain-race
#1
Pedro Belinchon-deMiguel, Vicente Javier Clemente-Suárez
The current research aimed to analyze psychophysiological, body composition, biomechanical and autonomic modifications in an ultraendurance mountain race. We analyzed 11 finisher voluntary athletes that participated in a 51.2 km ultraendurance mountain race. We measured before and after the mountain ultraendurance event the following parameters: Rate of perceived exertion, body composition, cortical arousal, blood pressure, body temperature, forced vital capacity, blood oxygen saturation, isometric hand strength and heart rate variability parameters...
January 5, 2018: Journal of Medical Systems
https://www.readbyqxmd.com/read/29278023/effect-of-%C3%AE-tocopherol-megadoses-on-hematologic-parameters-and-antioxidant-capacity-of-rats-in-an-ultraendurance-probe
#2
V J Clemente-Suárez, J Mielgo-Ayuso, J L Quiles, A Varela-Lopez, P Aranda
This study was aimed to analyze the effect of two different megadoses of α-tocopherol (vit E) in the antioxidant activity and red and white blood series of Wistar rats after a 180-min ultraendurance probe. Three groups of 10 rats were analyzed; VEAG: acute administration of a megadoses of 5,000 IU/kg of vit E the day before the probe; VECG: chronic administration of 1,000 IU/kg/day of vit E for 6 days before the probe; CG: placebo administration. VEAG presented white cells, red blood cells, hematocrit, hemoglobin values significantly higher than CG and VECG (p < 0...
December 1, 2017: Physiology International
https://www.readbyqxmd.com/read/29259804/acute-kidney-injury-associated-with-endurance-events-is-it-a-cause-for-concern-a-systematic-review
#3
L E Hodgson, E Walter, R M Venn, R Galloway, Y Pitsiladis, F Sardat, L G Forni
Introduction: A growing body of evidence suggests even small rises in serum creatinine (SCr) are of considerable clinical relevance. Given that participants in endurance events are exposed to potential (repeated) renal insults, a systematic review was undertaken to collate current evidence for acute kidney injury (AKI), complicating such events. Methods: A systematic review of studies and case reports meeting inclusion criteria on Medline and EMBASE (inception to October 2015)...
2017: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/28739377/blood-hemostatic-changes-during-an-ultraendurance-road-cycling-event-in-a-hot-environment
#4
Brian R Kupchak, Josh B Kazman, Jakob L Vingren, Danielle E Levitt, Elaine C Lee, Keith H Williamson, Lawrence E Armstrong, Patricia A Deuster
OBJECTIVE: This study aims to examine blood hemostatic responses to completing a 164-km road cycling event in a hot environment. METHODS: Thirty-seven subjects (28 men and 9 women; 51.8±9.5 [mean±SD] y) completed the ride in 6.6±1.1 hours. Anthropometrics (height, body mass [taken also during morning of the ride], percent body fat [%]) were collected the day before the ride. Blood samples were collected on the morning of the ride (PRE) and immediately after (IP) the subject completed the ride...
September 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28685860/exercise-mediated-modulation-of-autophagy-in-skeletal-muscle
#5
REVIEW
M Martin-Rincon, D Morales-Alamo, J A L Calbet
Although exercise exerts multiple beneficial health effects, it may also damage cellular structures. Damaged elements are continuously degraded and its constituents recycled to produce renovated structures through a process called autophagy, which is essential for the adaptation to training. Autophagy is particularly active in skeletal muscle, where it can be evaluated using specific molecular markers of activation (unc-51-like kinase 1 [ULK1] phosphorylation) and specific proteins indicating increased autophagosome content (increased total LC3, LC3-II, LC3-II/LC3-I ratio)...
March 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28303338/blood-glucose-kinetics-and-physiological-changes-in-a-type-1-diabetic-finisher-of-the-ultraman-triathlon-a-case-study
#6
Christopher W Bach, Daniel A Baur, William S Hyder, Michael J Ormsbee
PURPOSE: To investigate the blood glucose kinetics and physiological effects experienced by a type 1 diabetic (T1D) finisher of a 3-day, multi-stage ultra endurance triathlon consisting of a 10 km swim and 144.8 km bike (stage 1), a 275.4 km bike (stage 2), and an 84.4 km run (stage 3). METHODS: The athlete self-monitored blood glucose (SMBG) levels via fingerstick blood draw and hand-held glucometer. Researchers evaluated blood glucose kinetics via a continuous glucose monitoring device...
May 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28257712/the-effects-of-a-36-hour-mixed-task-ultraendurance-race-on-mucosal-immunity-markers-and-pulmonary-function
#7
David Bellar, Kellie A Murphy, Ritvik Aithal, Greggory R Davis, Tim Piper
OBJECTIVE: The present study was conducted to assess the changes in mucosal immunity and pulmonary function among participants in a 36-hour mixed task ultraendurance race. METHODS: Thirteen of the 20 race participants volunteered for the investigation (age 34±5 y). The event consisted of a mixture of aerobic, strong man, and military-style exercise. Participants had a pulmonary function test and gave a finger stick capillary blood sample and unstimulated saliva samples both before the event and upon dropout or completion...
March 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/27710151/exertional-hyponatremia-and-serum-sodium-change-during-ultraendurance-cycling
#8
Lawrence E Armstrong, Elaine C Lee, Douglas J Casa, Evan C Johnson, Matthew S Ganio, Brendon P McDermott, Jakob L Vingren, Hyun M Oh, Keith H Williamson
INTRODUCTION: Exertional hyponatremia (EH) during prolonged exercise involves all avenues of fluid-electrolyte gain and loss. Although previous research implicates retention of excess fluid, EH may involve either loss, gain, or no change of body mass. Thus, the etiology, predisposing factors, and recommendations for prevention are vague-except for advice to avoid excessive drinking. PURPOSE: This retrospective field study presents case reports of two unacquainted recreational cyclists (LC, 31y and AM, 39 years) who began exercise with normal serum electrolytes but finished a summer 164-km ride (ambient, 34±5°C) with a serum [Na+] of 130 mmol/L...
April 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27701969/state-of-the-science-ultraendurance-sports
#9
REVIEW
Martin D Hoffman
Participation in ultraendurance sports has been increasing in recent years. This participation growth has been associated with an increase in research focused on such events. While the total amount of research related to these sports remains relatively small compared with other sports, the research growth is encouraging. New sources for research funding for ultraendurance sports should advance the science. In addition to continued opportunities with observational studies, promising areas of investigation remain for experimental studies and research that uses ultraendurance-sport environments as models for studies relevant to wider populations...
September 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27669446/metabolic-responses-to-the-yukon-arctic-ultra-longest-and-coldest-in-the-world
#10
Robert H Coker, Alyssa N Weaver, Melynda S Coker, Carl J Murphy, Hanns-Christian Gunga, Mathias Steinach
PURPOSE: The Yukon Arctic Ultra is considered the longest and coldest ultraendurance event in the world. Cold exposure and exercise has been reported to influence circulating levels of myokines, adipokines, and hepatokines that may influence considerable alterations in the regulation of metabolism. The purpose of the study was to evaluate the influence of the Yukon Arctic Ultra (430-mile event) on potential activators of brown fat, metabolites, and body composition in healthy individuals...
February 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27548786/hydration-status-executive-function-and-response-to-orthostatism-after-a-118-km-mountain-race-are-they-interrelated
#11
Ignacio Martínez-Navarro, Oscar Chiva-Bartoll, Barbara Hernando, Eladio Collado, Vicente Porcar, Carlos Hernando
Martínez-Navarro, I, Chiva-Bartoll, O, Hernando, B, Collado, E, Porcar, V, and Hernando, C. Hydration status, executive function and response to orthostatism after a 118-km mountain race: are they interrelated? J Strength Cond Res 32(2): 441-449, 2018-The present study aimed to explore whether blood pressure (BP) and heart rate (HR) variability (HRV) responsiveness to orthostatism, jointly with executive function (EF) performance, was diminished after an ultra-endurance mountain race. Besides, we wanted to assess whether hydration status was related to either performance or the abovementioned alterations...
February 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27504148/oxidative-stress-assessment-in-response-to-ultraendurance-exercise-thiols-redox-status-and-ros-production-according-to-duration-of-a-competitive-race
#12
Alessandra Vezzoli, Cinzia Dellanoce, Simona Mrakic-Sposta, Michela Montorsi, Sarah Moretti, Annamaria Tonini, Lorenza Pratali, Roberto Accinni
Purpose. Response to an ultraendurance competitive race on thiols redox status, reactive oxygen species (ROS) production, and oxidative stress (OxS) was investigated according to duration. Methods. Twenty-four elite runners were examined: six completed 50 km and eighteen 100 km. Blood and urine samples were collected before and immediately after the race. Erythrocytes and plasma aminothiols by high-performance liquid chromatography, total antioxidant capacity (TAC), and OxS biomarkers (protein carbonyl (PC), thiobarbituric acid-reactive substances (TBARS), 8-isoprostane (8-iso-PGF2α), and 8-OH-2-deoxyguanosine (8-OH-dG)) by immunoenzymatic assays and ROS production by Electron Paramagnetic Resonance were assessed...
2016: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/27095539/corneal-opacity-in-a-participant-of-a-161-km-mountain-bike-race-at-high-altitude
#13
Morteza Khodaee, David R Torres
Visual dysfunction is a relatively uncommon complaint among athletes during ultraendurance races. The pathophysiology of most of these cases is unknown. Corneal opacity has been speculated as the etiology for most of reported cases. We are presenting a case of a 56-year-old man with a partial unilateral corneal opacity and edema at kilometer 150 of a 161-km mountain bike race in high altitude. He was not able to finish the race (12-hour cutoff) because of his visual symptoms. He completely recovered in 3 days with no sequelae...
June 2016: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/27092307/gastritis-and-gastric-ulcers-in-working-dogs
#14
REVIEW
Michael S Davis, Katherine K Williamson
Gastritis and gastric ulcers are an important cause of morbidity and mortality in canine athletes. Although the majority of scientific work on this condition has been performed in ultraendurance racing sled dogs, this condition has been identified in other canine athletes, including sled dogs competing in shorter events and dogs performing off-leash explosive detection duties. The cause of the syndrome is unknown, but current hypotheses propose a link between exercise-induced hyperthermia and loss of gastric mucosal barrier function as an early event in the pathogenesis...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/26679208/in-response-to-incidence-of-exercise-associated-hyponatremia-and-its-association-with-nonosmotic-stimuli-of-arginine-vasopressin-in-the-gnw100s-ultraendurance-marathon
#15
LETTER
Martin D Hoffman, Jeremy Joslin, Ian R Rogers
No abstract text is available yet for this article.
January 2016: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/26560107/fluid-retention-muscle-damage-and-altered-body-composition-at-the-ultraman-triathlon
#16
Daniel A Baur, Christopher W Bach, William J Hyder, Michael J Ormsbee
PURPOSE: The primary purpose of this investigation was to determine the effects of participation in a 3-day multistage ultraendurance triathlon (stage 1 = 10 km swim, 144.8 km bike; stage 2 = 275.4 km bike; stage 3 = 84.4 km run) on body mass and composition, hydration status, hormones, muscle damage, and blood glucose. METHODS: Eighteen triathletes (mean ± SD; age 41 ± 7.5 years; height 175 ± 9 cm; weight 73.5 ± 9.8 kg; male n = 14, female n = 4) were assessed before and after each stage of the race...
March 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/26508884/feet-swelling-in-a-multistage-ultraendurance-triathlete-a-case-study
#17
Beat Knechtle, Matthias Alexander Zingg, Patrizia Knechtle, Thomas Rosemann, Christoph Alexander Rüst
Recent studies investigating ultraendurance athletes showed an association between excessive fluid intake and swelling of the lower limbs such as the feet. To date, this association has been investigated in single-stage ultraendurance races, but not in multistage ultraendurance races. In this case study, we investigated a potential association between fluid intake and feet swelling in a multistage ultraendurance race such as a Deca Iron ultratriathlon with ten Ironman triathlons within 10 consecutive days. A 49-year-old well-experienced ultratriathlete competed in autumn 2013 in the Deca Iron ultratriathlon held in Lonata del Garda, Italy, and finished the race as winner within 129:33 hours:minutes...
2015: International Journal of General Medicine
https://www.readbyqxmd.com/read/25819111/cardiovascular-and-perceptual-responses-to-an-ultraendurance-channel-swim-a-case-study
#18
Daniel A Judelson, James R Bagley, Jennifer M Schumacher, Lenny D Wiersma
Ultraendurance open water swimming presents unique physiological challenges. This case study aimed to describe cardiovascular and perceptual responses during a successful solo channel swim. Investigators followed a female swimmer's Catalina Channel (32.2 km) crossing, monitoring water temperature (T(water)) and air temperature (T(air)), distance remaining (DR), average velocity, and heart rate (HR(swim)) at regular intervals. Every 24 minutes, the swimmer reported perceived pain (on a scale of 0-10), rating of perceived exertion (RPE [scale of 6-20]), perceived thermal sensation (scale 0-8), and thirst (scale 1-9)...
September 2015: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/25693897/psychophysiological-response-and-energy-balance-during-a-14-h-ultraendurance-mountain-running-event
#19
Vicente Javier Clemente-Suárez
Many studies have researched the psychophysiological response and energy balance of athletes in numerous ultraendurance probes, but none has investigated an ultraendurance mountain running event. The current study aims to analyze changes in blood lactate concentration, rating of perceived exertion, heart rate, heart rate variability, and energy balance after the performance of an ultraendurance mountain running event. The parameters in the 6 participants who finished the event were analyzed (age, 30.8 ± 3...
March 2015: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/25559907/ultraendurance-cycling-in-a-hot-environment-thirst-fluid-consumption-and-water-balance
#20
Lawrence E Armstrong, Evan C Johnson, Amy L McKenzie, Lindsay A Ellis, Keith H Williamson
The purpose of this field investigation was to identify and clarify factors that may be used by strength and conditioning professionals to help athletes drink adequately but not excessively during endurance exercise. A universal method to accomplish this goal does not exist because the components of water balance (i.e., sweat rate, fluid consumed) are different for each athlete and endurance events differ greatly. Twenty-six male cyclists (mean ± SD; age, 41 ± 8 years; height, 177 ± 7 cm; body mass, 81.85 ± 8...
April 2015: Journal of Strength and Conditioning Research
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