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https://www.readbyqxmd.com/read/29912079/impact-of-physical-performance-and-anthropometric-characteristics-on-serve-velocity-in-elite-junior-tennis-players
#1
Janina Fett, Alexander Ulbricht, Alexander Ferrauti
Fett, J, Ulbricht, A, and Ferrauti, A. Impact of physical performance and anthropometric characteristics on serve velocity in elite junior tennis players. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to investigate the impact of physical performance components and anthropometric characteristics on serve velocity (SV) in elite junior tennis players depending on the sex and age group. A sample of the best 1,019 (male = 625, female = 394) junior squad tennis players of the German Tennis Federation participated in the study involving complex anthropometric measurements (body height, body mass, sitting height, and arm span) and physical tests (e...
June 14, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29910315/topical-and-ingested-cooling-methodologies-for-endurance-exercise-performance-in-the-heat
#2
REVIEW
Russ Best, Stephen Payton, Iain Spears, Florence Riera, Nicolas Berger
This systematic review and meta-analysis aimed to assess studies which have investigated cooling methodologies, their timing and effects, on endurance exercise performance in trained athletes (Category 3; VO2max ≥ 55 mL·kg·min-1 ) in hot environmental conditions (≥28 °C). Meta-analyses were performed to quantify the effects of timings and methods of application, with a narrative review of the evidence also provided. A computer-assisted database search was performed for articles investigating the effects of cooling on endurance performance and accompanying physiological and perceptual responses...
February 2, 2018: Sports
https://www.readbyqxmd.com/read/29901435/sex-dependent-responses-to-exertional-heat-stroke-in-mice
#3
Christian K Garcia, Alex J Mattingly, Gerard P Robinson, Orlando Laitano, Michelle A King, Shauna M Dineen, Lisa R Leon, Thomas L Clanton
With increasing participation of females in endurance athletics and active military service, it is important to determine if there are inherent sex-dependent susceptibilities to exertional heat injury or heat stroke. In this study we compared responses of male and female adult mice to exertional heat stroke (EHS). All mice were instrumented for telemetry core temperature measurement and were exercise-trained for 3 weeks prior to EHS. During EHS, environmental temperature was 37.5{degree sign}C (35% RH) while the mice ran on a forced running wheel, using incremental increases in speed...
June 14, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29899711/unchanged-erythrocyte-profile-after-exposure-to-cryogenic-temperatures-in-elder-marathon-runners
#4
Jadwiga Szymura, Magdalena Wiecek, Marcin Maciejczyk, Joanna Gradek, Malgorzata Kantorowicz, Zbigniew Szygula
Objective: Endurance runners may experience "sports anemia" resulting from intravascular hemolysis. In addition, aging has negative impact on hematopoiesis and rheological properties of blood, and erythrocyte membranes in older people are more vulnerable to oxidative damage, which together can lead to anemia. Whole-body cryostimulation (WBCST) is increasingly used in the elderly as a method of biological regeneration of athletes or therapy and preventive treatment. That is why the aim of the study was to determine whether repeated WBCST had an effect on the erythrocyte system in master marathon runners, compared to non-training men...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29894642/acute-modulation-in-dietary-behavior-following-glycogen-depletion-and-post-exercise-supplementation-in-trained-cyclists
#5
Hsuan-Yu Wan, Jonathon L Stickford, Emily Dawkins, Alice K Lindeman, Joel M Stager
We investigated the influence of immediate post-exercise dietary supplementation on the subsequent food consumption pattern and endurance exercise performance in physically trained individuals. On two occasions, trained male cyclists performed a glycogen-depleting exercise bout followed by a 2-hour nutritional supplementation period, 28 hours of free-living recovery, and a subsequent 40-km cycling time trial. During the 2-hour post-exercise supplementation, subjects consumed equal volumes of reduced-fat chocolate milk (CM) or a sports beverage (SB) in a single-blind, randomized design...
June 12, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29893180/potential-adverse-cardiac-remodelling-in-highly-trained-athletes-still-unknown-clinical-significance
#6
Luigi Gabrielli, Marta Sitges, Mario Chiong, Jorge Jalil, María Ocaranza, Silvana Llevaneras, Sebastian Herrera, Rodrigo Fernandez, Rodrigo Saavedra, Fernando Yañez, Luis Vergara, Alexis Diaz, Sergio Lavandero, Pablo Castro
Moderate endurance exercise has long been considered an essential element to maintain cardiovascular health, and sedentary behaviour in the general population has been related to a significant increase in all-causes of mortality, cardiovascular disease mortality and cardiovascular disease incidence. However, a growing group of people performs an intense exercise that leads to multiple heart adaptive changes that are collectively called "athlete's heart". In this review, we discussed the evidence of cardiac remodelling process secondary to repetitive and strenuous exercise in some predisposed athletes that produces intense and probably deleterious changes in cardiac morphology and function with no clear clinical significance in long-term follow-up...
June 12, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29889868/increasing-effort-without-noticing-a-randomized-controlled-pilot-study-about-the-ergogenic-placebo-effect-in-endurance-athletes-and-the-role-of-supplement-salience
#7
Ellen K Broelz, Sebastian Wolf, Patrick Schneeweiss, Andreas M Niess, Paul Enck, Katja Weimer
PURPOSE: Previous research shows that endurance performance can be enhanced by placebo ergogenic aids. This study investigates the ergogenic placebo response, which we define as an increase in objective and physiological effort without an increase in subjective effort, in competitive cyclists. The primary objective of this study is to explore the role of supplement salience in the ergogenic placebo response, while the secondary aim is to assess whether believing to have taken an inactive placebo supplement attenuates the desired ergogenic effect...
2018: PloS One
https://www.readbyqxmd.com/read/29889151/energy-availability-macronutrient-intake-and-nutritional-supplementation-for-improving-exercise-performance-in-endurance-athletes
#8
Gretchen A Casazza, Ashley P Tovar, Christine E Richardson, Angela N Cortez, Brian A Davis
Endurance athletes use nutritional guidelines and supplements to improve exercise performance and recovery. However, use is not always based on scientific evidence of improved performance, which type of athlete would benefit most, or the optimal dose and timing of a particular supplement. Health professionals that give advice to athletes need to target their recommendations on the energy systems and muscle fiber types used for the athlete's sporting event, the goal of the training block, the time of the competitive season, and the characteristics and food preferences of the individual athlete...
June 2018: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/29876876/the-effect-of-acute-caffeine-ingestion-on-endurance-performance-a-systematic-review-and-meta-analysis
#9
REVIEW
Kyle Southward, Kay J Rutherfurd-Markwick, Ajmol Ali
BACKGROUND: Caffeine is a widely used ergogenic aid with most research suggesting it confers the greatest effects during endurance activities. Despite the growing body of literature around the use of caffeine as an ergogenic aid, there are few recent meta-analyses that quantitatively assess the effect of caffeine on endurance exercise. OBJECTIVES: To summarise studies that have investigated the ergogenic effects of caffeine on endurance time-trial performance and to quantitatively analyse the results of these studies to gain a better understanding of the magnitude of the ergogenic effect of caffeine on endurance time-trial performance...
June 6, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29875696/protein-and-the-adaptive-response-with-endurance-training-wishful-thinking-or-a-competitive-edge
#10
Pim Knuiman, Maria T E Hopman, Conor Verbruggen, Marco Mensink
The significance of carbohydrates for endurance training has been well established, whereas the role of protein and the adaptive response with endurance training is unclear. Therefore, the aim of this perspective is to discuss the current evidence on the role of dietary protein and the adaptive response with endurance training. On a metabolic level, a single bout of endurance training stimulates the oxidation of several amino acids. Although the amount of amino acids as part of total energy expenditure during exercise is relatively low compared to other substrates (e...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29863593/polarized-vs-threshold-training-intensity-distribution-on-endurance-sport-performance-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#11
Michael A Rosenblat, Andrew S Perrotta, Bill Vicenzino
Rosenblat MA, Perrotta AS, and Vicenzino B. Polarized vs. threshold training intensity distribution on endurance sport performance: A systematic review and meta-analysis of randomized controlled trials. J Strength Cond Res XX(X): 000-000, 2018-The objective of this review was to systematically search the literature to identify and analyze data from randomized controlled trials that compare the effects of a polarized training model (POL) vs. a threshold training model (THR) on measurements of sport performance in endurance athletes...
May 30, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29861827/diurnal-variation-in-physiological-and-immune-responses-to-endurance-sport-in-highly-trained-runners-in-a-hot-and-humid-environment
#12
B Boukelia, E C Gomes, G D Florida-James
Purpose: The purpose of this study was to investigate the physiological and immunological response of highly trained runners to an intense bout of exercise performed at two different times of day, in a hot, humid environment. Methods: Using a crossover randomized design, 13 highly trained runners (range [Formula: see text] 64-79 ml·kg-1  min-1 ) performed a 10 km time trial run in hot (28°C) and humid conditions (70%), at 2 different times of day (09:00 hs and 18:00 hs)...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29860237/low-energy-availability-surrogates-correlate-with-health-and-performance-consequences-of-relative-energy-deficiency-in-sport
#13
Kathryn E Ackerman, Bryan Holtzman, Katherine M Cooper, Erin F Flynn, Georgie Bruinvels, Adam S Tenforde, Kristin L Popp, Andrew J Simpkin, Allyson L Parziale
Low energy availability (EA) is suspected to be the underlying cause of both the Female Athlete Triad and the more recently defined syndrome, Relative Energy Deficiency in Sport (RED-S). The International Olympic Committee (IOC) defined RED-S as a syndrome of health and performance impairments resulting from an energy deficit. While the importance of adequate EA is generally accepted, few studies have attempted to understand whether low EA is associated with the health and performance consequences posited by the IOC...
June 2, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29850409/paroxysmal-atrial-fibrillation-in-young-and-middle-aged-athletes-pafiyama-syndrome-in-the-real-world-a-paradigmatic-case-report
#14
Gianfranco Cervellin, Fabian Sanchis-Gomar, Ida Filice, Giuseppe Lippi
An enhanced risk of atrial fibrillation (AF) has been clearly documented in endurance athletes over the past decades. In this regard, we have recently described the 'PAFIYAMA' ('paroxysmal AF in young and middle-aged athletes') syndrome, provided that other risk factors for AF and underlying conditions have been ruled out. We report here a paradigmatic case of PAFIYAMA syndrome. A 32 years old man was admitted to the Emergency Department (ED) complaining for palpitations, lasting for 3 hours. He had never smoked and other risk factors for AF could be ruled out...
April 2018: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/29809072/concurrent-training-for-sports-performance-the-two-sides-of-the-medal
#15
Nicolas Berryman, Inigo Mujika, Laurent Bosquet
The classical work by Robert C. Hickson showed in 1980 that the addition of a resistance training protocol to a predominantly aerobic program could lead to impaired leg strength adaptations in comparison to a resistance-only training regimen. This interference phenomenon was later highlighted in many reports, including a meta-analysis. However, it seems that the interference effect has not been consistently reported, probably because of the complex interactions between training variables and methodological issues...
May 29, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29799502/an-8-week-ketogenic-low-carbohydrate-high-fat-diet-enhanced-exhaustive-exercise-capacity-in-mice
#16
Sihui Ma, Qingyi Huang, Koichi Yada, Chunhong Liu, Katsuhiko Suzuki
Current fueling tactics for endurance exercise encourage athletes to ingest a high carbohydrate diet. However, athletes are not generally encouraged to use fat, the largest energy reserve in the human body. A low carbohydrate, high fat ketogenic diet (KD) is a nutritional approach ensuring that the body utilizes lipids. Although KD has been associated with weight-loss, enhanced fat utilization in muscle and other beneficial effects, there is currently no clear proof whether it could lead to performance advantage...
May 25, 2018: Nutrients
https://www.readbyqxmd.com/read/29794559/blood-pressure-response-to-maximal-dynamic-exercise-testing-in-an-athletic-population
#17
Axel Pressler, Angelika Jähnig, Martin Halle, Bernhard Haller
OBJECTIVE: Exaggerated blood pressure (BP) response to exercise testing has been linked to left ventricular hypertrophy and myocardial fibrosis in competitive athletes. Due to frequent training, athletes are particularly exposed to high BP levels, but data on the magnitude and distribution of BP response to exercise in athletic populations is scarce. METHODS: Cycle ergometry was performed in 2419 healthy competitive adolescent, professional and master athletes (age 26 ± 12 years, range 9-74, 27% women, 84 disciplines) for preparticipation screening...
May 21, 2018: Journal of Hypertension
https://www.readbyqxmd.com/read/29792778/does-iron-supplementation-improve-performance-in-iron-deficient-nonanemic-athletes
#18
Amity Rubeor, Carmen Goojha, Jeffrey Manning, Jordan White
CONTEXT: Supplementing iron-deficient nonanemic (IDNA) athletes with iron to improve performance is a trend in endurance sports. OBJECTIVES: To investigate the benefits of iron on performance, identify a ferritin level cutoff in IDNA athletes, and determine which iron supplementation regimens are most effective. DATA SOURCES: A search of the PubMed, CINAHL, Embase, ERIC, and Cochrane databases was performed in 2014 including all articles. Citations of pertinent review articles were also searched...
May 1, 2018: Sports Health
https://www.readbyqxmd.com/read/29791605/athlete-s-heart-in-a-brazilian-paralympic-judo-team-case-series-study
#19
Japy Angelini Oliveira Filho, Maria Beatriz Monteiro Barros, Ana Fátima Salles, Leandro Santini Echenique, Orlando Campos Filho, Rui Manoel Santos Póvoa
BACKGROUND: Athlete's heart is a term describing the cardiovascular effects of long-term conditioning among highly trained athletes. It is a variation of normal standards. DESIGN AND SETTING: Case series study at the cardiology division of a public university hospital. METHODS: We studied 14 visually handicapped paralympic athletes (8 men) in the national judo team. They were 26.3 ± 6.4 years old, with body mass index 25 ± 14, and had been practicing judo for 9...
March 2018: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/29781119/the-effect-of-lifelong-exercise-frequency-on-arterial-stiffness
#20
Shigeki Shibata, Naoki Fujimoto, Jeffrey L Hastings, Graeme Carrick-Ranson, Paul S Bhella, Christopher Hearon, Benjamin D Levine
Central arterial stiffness increases with sedentary aging. While near-daily, vigorous lifelong (>25 yr) endurance exercise training prevents arterial stiffening with aging, this rigorous routine of exercise training over a lifetime is impractical for most individuals. The aim was to examine whether a less frequent 'dose' of lifelong exercise training (4-5 sessions/wk for > 30 min) that is consistent with current physical activity recommendations elicits similar benefits on central arterial stiffening with aging...
May 20, 2018: Journal of Physiology
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