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https://www.readbyqxmd.com/read/28630581/5000-meter-run-performance-is-not-enhanced-24-hrs-after-an-intense-exercise-bout-and-cold-water-immersion
#1
Mary C Stenson, Matthew R Stenson, Tracey D Matthews, Vincent J Paolone
Cold water immersion (CWI) is used by endurance athletes to speed recovery between exercise bouts, but little evidence is available on the effects of CWI on subsequent endurance performance. The purpose of this study was to investigate the effects of CWI following an acute bout of interval training on 5000 m run performance 24 hrs after interval training, perceived muscle soreness (PMS), range of motion (ROM), thigh circumference (TC), and perceived exertion (RPE). Nine endurance-trained males completed 2 trials, each consisting of an interval training session of 8 repetitions of 1200 m at a running pace equal to 75% of VO2peak, either a control or CWI treatment, and a timed 5000 m run 24 hrs post interval training session...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630575/acute-and-post-exercise-physiological-responses-to-high-intensity-interval-training-in-endurance-and-sprint-athletes
#2
Lukas Cipryan, Gerhard Tschakert, Peter Hofmann
The purpose of the presented study was to compare acute and post-exercise differences in cardiorespiratory, metabolic, cardiac autonomic, inflammatory and muscle damage responses to high-intensity interval exercise (HIIT) between endurance and sprint athletes. The study group consisted of sixteen highly-trained males (age 22.1 ± 2.5 years) participating in endurance (n = 8) or sprint (n = 8) sporting events. All the participants underwent three exercise sessions: short HIIT (work interval duration 30s), long HIIT (3min) and constant load exercise (CE)...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630572/the-role-of-a-relative-age-effect-in-the-7-th-international-children-s-winter-games-2016-and-the-influence-of-biological-maturity-status-on-selection
#3
Lisa Müller, Carolin Hildebrandt, Christian Raschner
The aim of this study was to analyse the role of a relative age effect (RAE) and to investigate the influence of biological maturity status on the RAE at the 7(th) International Children`s Winter Games. The birth dates of all 572 participants (365 males, 207 females) were analysed, and the biological maturity status of 384 athletes (243 males, 141 females) was assessed by the age at peak height velocity (APHV) method. A RAE was present in the total sample (χ(2) = 67.81; p < 0.001), and among both male (χ(2) = 49...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28628396/differential-in-maximal-aerobic-capacity-by-sex-in-collegiate-endurance-athletes-consuming-a-marginally-low-carbohydrate-diet
#4
Marissa N Baranauskas, Brian Miller, Jordan T Olson, Michelle Boltz, Laura Richardson, Matthew Juravich, Ronald Otterstetter
PURPOSE: Although current sports nutrition recommendations advocate for a high carbohydrate (CHO) intake among endurance athletes, recent research has suggested that training with low CHO availability may augment adaptations to aerobic training. The purpose of this study was to observe the dietary habits of collegiate distance runners and to investigate the effects of habitual CHO intake on aerobic performance [VO2max(post)] during a competitive season. METHODS: During an 8-week trial period, 12 (N = 12) collegiate track athletes recorded their self-selected dietary intake via 24-hour recall...
June 19, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28627298/a-prospective-transcranial-doppler-ultrasound-based-evaluation-of-the-acute-and-cumulative-effects-of-sport-related-concussion-on-neurovascular-coupling-response-dynamics
#5
Alexander D Wright, Jonathan D Smirl, Kelsey Bryk, Paul van Donkelaar
Sport-related concussion has been shown to alter cerebral blood flow (CBF) both acutely and chronically, and may exert cumulative effects across multiple injuries. Such dysfunction may be mediated by trauma-induced deficits to CBF control mechanisms, though our understanding of these effects is limited, including dynamics of neurovascular coupling (NVC) responses (i.e. CBF responses to neurologic demand). 179 junior-level contact sport athletes completed preseason testing - 42 reported never having experienced a concussion (Hx-) while 31 had endured three or more (Hx3+)...
June 18, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28626339/effects-of-2-week-intermittent-training-in-hypobaric-hypoxia-on-the-aerobic-energy-metabolism-and-performance-of-cycling-athletes-with-disabilities
#6
Sang-Hoon Kim, Ho-Jung An, Jung-Hyun Choi, Yong-Youn Kim
[Purpose] The present study aimed at examining changes in aerobic energy metabolism and performance in cycling athletes after 2 weeks of intermittent training in a multistep hypobaric hypoxia environment. [Subjects and Methods] We also aimed at using the findings to propose an efficient training program in hypobaric hypoxia for endurance athletes with disabilities. The study participants were three cycling athletes with physical disabilities from the Korean national team (A, B, and C athletes). They underwent complex (repetition, interval, and continued) training with a roller-type cycle in a multistep hypobaric hypoxia environment (simulated altitude, 4,000 m above sea level)...
June 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28626143/effect-of-conjugated-linoleic-acid-intake-on-endurance-exercise-performance-and-anti-fatigue-in-student-athletes
#7
Naoko Terasawa, Ken Okamoto, Kenta Nakada, Kazumi Masuda
Conjugated linoleic acids (CLA) intake has been reported to reduce body fat mass or increase lean body mass and to improve exercise outcome by modulating testosterone in humans. These reports have studied mostly overweight subjects; few were athletes. Therefore, in this study, the effect of CLA intake on endurance performance and anti-fatigue in student athletes was investigated. A double-blind, crossover study was conducted with 10 male student athletes. Each subject was administered with either CLA (net 0...
June 13, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28623613/assessment-of-metabolic-flexibility-by-means-of-measuring-blood-lactate-fat-and-carbohydrate-oxidation-responses-to-exercise-in-professional-endurance-athletes-and-less-fit-individuals
#8
Iñigo San-Millán, George A Brooks
BACKGROUND: Increased muscle mitochondrial mass is characteristic of elite professional endurance athletes (PAs), whereas increased blood lactate levels (lactatemia) at the same absolute submaximal exercise intensities and decreased mitochondrial oxidative capacity are characteristics of individuals with low aerobic power. In contrast to PAs, patients with metabolic syndrome (MtS) are characterized by a decreased capacity to oxidize lipids and by early transition from fat to carbohydrate oxidation (FATox/CHOox), as well as elevated blood lactate concentration [La(-)] as exercise power output (PO) increases, a condition termed 'metabolic inflexibility'...
June 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28611674/is-marathon-training-harder-than-the-ironman-training-an-eco-method-comparison
#9
Jonathan Esteve-Lanao, Diego Moreno-Pérez, Claudia A Cardona, Eneko Larumbe-Zabala, Iker Muñoz, Sergio Sellés, Roberto Cejuela
Purpose: To compare the absolute and relative training load of the Marathon (42k) and the Ironman (IM) training in recreational trained athletes. Methods: Fifteen Marathoners and Fifteen Triathletes participated in the study. Their performance level was the same relative to the sex's absolute winner at the race. No differences were presented neither in age, nor in body weight, height, BMI, running VO2max max, or endurance training experience (p > 0.05). They all trained systematically for their respective event (IM or 42k)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28606607/state-of-the-art-review-atrial-fibrillation-in-athletes
#10
REVIEW
M Darragh Flannery, Jonathan M Kalman, Prashanthan Sanders, André La Gerche
Exercise has substantial health benefits with pleomorphic vascular, metabolic, psychological and anti-neoplastic actions resulting in improved quality of life and longevity. Despite these many benefits, numerous studies have shown that endurance athletes are more likely to develop atrial fibrillation (AF) than non-athletes. The type, intensity and amount of sport appears to influence the risk of developing AF. Several endurance sport activities have been shown to increase the risk of developing AF but an excess in AF has not been shown in non-endurance sports...
June 3, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28605609/effects-of-macro-and-micro-nutrients-on-exercise-induced-hepcidin-response-in-highly-trained-endurance-athletes
#11
Dylan Timothy Dahlquist, Trent Stellingwerff, Brad Pendleton Dieter, Donald C McKenzie, Michael S Koehle
Iron deficiency (ID) has ergolytic effects on athletic performance. Exercise induced inflammation impedes iron absorption in the digestive tract by up-regulating the expression of the iron regulatory protein, hepcidin. Limited research indicates the potential of specific macro- and micro- nutrients on blunting exercise induced hepcidin. Therefore, we investigated the effects of post-exercise supplementation with protein and carbohydrate (CHO) and vitamins D3 and K2 on the post-exercise hepcidin response. Ten highly-trained male cyclists (age: 26...
June 12, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28605210/pacing-strategy-during-simulated-mountain-bike-racing
#12
Bruno Ferreira Viana, Flávio Oliveira Pires, Allan Inoue, Tony Meireles Santos
Cross-country mountain biking (XCO) is a popular high-intensity cycling endurance event, however, XCO pacing strategy has not been fully examined. This study examined the pacing strategies of different XCO athletes, during a laboratory-simulated XCO performance test. Brazilian cyclists classified as performance cohort level three (PL3-trained) performed an XCO race simulation. The simulation consisted of four 10 km laps with a gradient of 0-10%. No group vs. time interaction was found in lap time (P = 0.169), absolute (P = 0...
June 12, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28605209/pacing-and-self-regulation-important-skills-for-talent-development-in-endurance-sports
#13
Marije T Elferink-Gemser, Florentina J Hettinga
Pacing has been characterized as a multi-faceted goal-directed process of decision-making in which athletes need to decide how and when to invest their energy during the race, a process essential for optimal performance. Both physiological as well as psychological characteristics associated with adequate pacing and performance are known to develop with age. Consequently, the multi-faceted skill of pacing might be under construction throughout adolescence as well. Therefore, we propose that the complex skill of pacing is a potential important performance characteristic for talented youth athletes, that needs to be developed throughout adolescence...
June 12, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28595238/distinguishing-playing-status-through-a-functionally-relevant-performance-measure-in-female-division-i-collegiate-soccer-athletes
#14
Mitchel A Magrini, Ryan J Colquhoun, John H Sellers, Eric C Conchola, Garrett M Hester, Ryan M Thiele, Zach K Pope, Doug B Smith
Although soccer is predominately an endurance sport, high velocity movements may be an important indicator of athletic success. The purpose of this investigation was to establish whether squat jumps (SJ) can differentiate starters from non-starters with a female collegiate division I soccer team. Eighteen female division I soccer athletes were separated into two groups: 9 starters (age: 19.5 ± 1.0; mass = 64.8 ± 11.5 kg; height = 167.5 ± 7.7 cm; games started = 18.2 ± 4.7; minutes played = 1633.8 ± 478...
June 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28591543/influence-of-polyphenol-rich-diet-on-exercise-induced-immunomodulation-in-male-endurance-athletes
#15
Korbinian Lackermair, Johannes Scherr, Georg Waidhauser, Heiko Methe, Eva Hoster, David C Nieman, Alan Hanley, Sebastian Clauss, Martin Halle, Thomas Nickel
<u>Introduction:</u> Stress is associated with increased susceptibility to infection. We investigated if the mechanism involves immunomodulation of dendritic cells and whether this can be inhibited by a polyphenol-rich diet. <u>Methods:</u> Blood samples were taken from a total of 100 male endurance athletes at five time points around a marathon run: four weeks before, during one week before, and immediately, 24hours and 72hours after. Participants were randomized into two double blinded groups...
June 7, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28580427/incidental-finding-of-low-brown-adipose-tissue-activity-in-endurance-trained-individuals-methodological-considerations-for-positron-emission-tomography
#16
Eric T Trexler, Drew McCallister, Abbie E Smith-Ryan, Rosa T Branca
Brown adipose tissue (BAT) in adults has been shown to have a meaningful impact on energy expenditure and cold-induced thermogenesis. Data from rodent research have suggested that exercise may be a promising method of increasing BAT activity, with potential applications to the treatment and prevention of obesity and diabetes. However, emerging human research using positron emission tomography (PET) with [18F] Fluorodeoxyglucose (FDG) has identified lower BAT activity in endurance-trained athletes compared to sedentary controls, despite similar metabolic rate responses to cold exposure...
March 2017: Journal of Nature and Science
https://www.readbyqxmd.com/read/28579962/the-crosstalk-between-the-gut-microbiota-and-mitochondria-during-exercise
#17
REVIEW
Allison Clark, Núria Mach
Many physiological changes occur in response to endurance exercise in order to adapt to the increasing energy needs, mitochondria biogenesis, increased reactive oxygen species (ROS) production and acute inflammatory responses. Mitochondria are organelles within each cell that are crucial for ATP production and are also a major producer of ROS and reactive nitrogen species during intense exercise. Recent evidence shows there is a bidirectional interaction between mitochondria and microbiota. The gut microbiota have been shown to regulate key transcriptional co-activators, transcription factors and enzymes involved in mitochondrial biogenesis such as PGC-1α, SIRT1, and AMPK genes...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28575558/-model-ontogenetic-variability-functional-state-of-the-organism-in-different-modes-of-motor-activity
#18
V V Myakotnyh, L S Khodasevich
The analysis of the study results of remote training effect of physical training and sports in the age range including the later periods of human ontogenesis, from the point of oxidative stress theory. To study the characteristics of developmental variability of the functional state of the organism, a comparative study of the functional state of the body at different modes of physical activity in different age stages of development was carried out: from sports veterans, remain actively locomotor activity after the termination of sports career; former athletes, leading a sedentary lifestyle; persons engaged in improving the forms of physical exercise; as well as persons who had not engaged in regular physical activity...
2017: Advances in Gerontology, Uspekhi Gerontologii
https://www.readbyqxmd.com/read/28569552/cardiac-troponins-potential-biomarkers-for-the-detection-of-subclinical-coronary-artery-disease-in-athletes-participating-in-endurance-sports
#19
Jinlei Nie
No abstract text is available yet for this article.
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28566803/greater-muscle-damage-in-athletes-with-actn3-r577x-rs1815739-gene-polymorphism-after-an-ultra-endurance-race-a-pilot-study
#20
T Belli, A H Crisp, R Verlengia
In this study, we aimed to investigate the influence of ACTN3 R577X gene polymorphism on muscle damage responses in athletes competing in an ultra-endurance race. Twenty moderate to well-trained ultra-runners who had entered in an official 37.1 km adventure race (22.1 km mountain biking, 10.9 km trekking, 4.1 km water trekking, 30 m rope course, and orienteering) volunteered for the study. Blood samples were collected for genotyping and analysis of muscle protein levels before and after the race. Percentage changes (pre- to post-race) of serum myoglobin [XX = 5,377% vs...
June 2017: Biology of Sport
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