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https://www.readbyqxmd.com/read/29643999/sympatho-adrenergic-activation-by-endurance-exercise-effect-on-metanephrines-spillover-and-its-role-in-predicting-athlete-s-performance
#1
Elisa Danese, Cantor Tarperi, Gian Luca Salvagno, Alessandra Guzzo, Fabian Sanchis-Gomar, Luca Festa, Luciano Bertinato, Martina Montagnana, Federico Schena, Giuseppe Lippi
Background: The sympatho-adrenergic activation during exercise is implicated in many cardiovascular respiratory and metabolic adaptations which have been thought to partially explain the different levels of performance observed between trained and untrained subjects. To date, no evidence exists about the association between competition performance and markers of "acute stress response". We designed this study to investigate; (i) the acute sympatho-adrenergic activation during endurance exercise in recreational runners by measuring plasma levels of free metanephrine (MN) and normethanephrine (NMN) before and after a half-marathon run; (ii) the association between the metanephrines levels and the running time...
March 20, 2018: Oncotarget
https://www.readbyqxmd.com/read/29570600/the-age-of-peak-marathon-performance-in-cross-country-skiing-the-engadin-ski-marathon
#2
Beat Knechtle, Pantelis T Nikolaidis
Knechtle, B and Nikolaidis, PT. The age of peak marathon performance in cross-country skiing-the "Engadin Ski Marathon." J Strength Cond Res 32(4): 1131-1136, 2018-The age of the best endurance performance has been well investigated in flat city running marathons. However, we have no knowledge about the age of peak marathon performance in cross-country skiing, which would be of great practical value for athletes and coaches. Therefore, the aim of the present study was to examine the age of peak marathon performance in cross-country skiing...
April 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29558432/a-low-cost-tracking-system-for-running-race-applications-based-on-bluetooth-low-energy-technology
#3
David Perez-Diaz-de-Cerio, Ángela Hernández-Solana, Antonio Valdovinos, Jose Luis Valenzuela
Timing points used in running races and other competition events are generally based on radio-frequency identification (RFID) technology. Athletes' times are calculated via passive RFID tags and reader kits. Specifically, the reader infrastructure needed is complex and requires the deployment of a mat or ramps which hide the receiver antennae under them. Moreover, with the employed tags, it is not possible to transmit additional and dynamic information such as pulse or oximetry monitoring, alarms, etc. In this paper we present a system based on two low complex schemes allowed in Bluetooth Low Energy (BLE): the non-connectable undirected advertisement process and a modified version of scannable undirected advertisement process using the new capabilities present in Bluetooth 5...
March 20, 2018: Sensors
https://www.readbyqxmd.com/read/29557279/the-influence-of-pacing-strategy-on-marathon-world-records
#4
José Joaquín Díaz, Eduardo José Fernández-Ozcorta, Jordan Santos-Concejero
The aim of this study was to analyse the influence of the pacing strategy adopted by elite marathon runners when setting every marathon world record in the last 50 years. We divided former marathon record holders into two groups: classic athletes (record holders between 1967 and 1988) and contemporaneous athletes (record holders between 1988 and 2018). The total distance of the marathon was divided into 8 sections of 5 km and 1 last section of 2.195 km, and the relative average speed of each section was calculated individually...
March 20, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29543080/peak-age-and-performance-progression-in-world-class-track-and-field-athletes
#5
Thomas A Haugen, Paul A Solberg, Carl Foster, Ricardo Morán-Navarro, Felix Breitschädel, Will G Hopkins
The aim of this study was to quantify peak age and improvements over the preceding years to peak age in elite athletic contestants according to athlete performance level, sex and discipline. Individual season bests for world-ranked top 100 athletes from 2002 to 2016 (14937 athletes and 57049 individual results) were downloaded from the International Association of Athletics Federations' web site. Individual performance trends were generated by fitting a quadratic curve separately to each athlete's performance and age data using a linear modeling procedure...
March 15, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29526077/sex-differences-in-the-age-of-peak-marathon-race-time
#6
Pantelis T. Nikolaidis, Thomas Rosemann, Beat Knechtle
Recent studies showed that women were older than men when achieving their fastest marathon race time. These studies, however, investigated a limited sample of athletes. We investigated the age of peak marathon performance in a large sample of female and male marathon finishers by using data from all finishers. We analyzed the age of peak marathon performance in 1-year and 5-year age intervals of 451,637 runners (i.e. 168,702 women and 282,935 men) who finished the ‘New York City Marathon’ between 2006 and 2016, using analysis of variance and non-linear regression analysis...
April 30, 2018: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/29489731/performance-in-100-km-ultra-marathoners-at-which-age-it-reaches-its-peak
#7
Pantelis Theodoros Nikolaidis, Beat Knechtle
The number of those participating in 100-km ultra-marathon has increased over the last years; however, we have limited knowledge about performance trends in this sport, and particularly the effect of age. The aim of the present study was to analyze the age when women and men runners achieve their peak performance considering 1- and 5-year age group intervals, and examining all or the fastest (i.e. top ten) participants in each age group. We analyzed 370,051 athletes (i.e. 44,601 women and 325,450 men) who finished a 100-km ultra-marathon between 1959 and 2016, and studied the age of peak performance using a second-order non-linear regression analysis...
February 27, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29489725/improved-performance-in-master-runners-competing-in-the-european-championships-between-1978-and-2014
#8
Anaïs L Schneider, Pantelis T Nikolaidis, Beat Knechtle
The performance trends in elite runners have been well investigated, but we have no knowledge about performance trends and the difference between the sexes in elderly runners competing at a high level in varying distances. The purpose of this study was to investigate the performance of these age groups. Data from seventeen European Championships held between 1978 and 2014 were analyzed for various race distances (i.e. 100 m, 200 m, 400 m, 800 m, 1500 m, 5000 m, 10,000 m and marathon). Running speed for the top 8 female and male finalists for each age group (35-99 years, split into 5 year gaps) and each race distance were included...
February 27, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29483882/fluid-metabolism-in-athletes-running-seven-marathons-in-seven-consecutive-days
#9
Daniela Chlíbková, Pantelis T Nikolaidis, Thomas Rosemann, Beat Knechtle, Josef Bednář
Purpose: Hypohydration and hyperhydration are significant disorders of fluid metabolism in endurance performance; however, little relevant data exist regarding multi-stage endurance activities. The aim of the present study was to examine the effect of running seven marathons in 7 consecutive days on selected anthropometric, hematological and biochemical characteristics with an emphasis on hydration status. Methods: Participants included 6 women and 20 men (age 42.6 ± 6.2 years). Data was collected before day 1 (B1 ) and after day 1 (A1 ), 4 (A4 ), and 7 (A7 )...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29455769/prevention-of-sudden-cardiac-death-in-athletes-sportspersons-and-marathoners-in-india
#10
REVIEW
Amit Vora, Nitin Burkule, Ashish Contractor, Kartikeya Bhargava
The annual incidence of sudden cardiac death (SCD) in athletes is significantly lower than the general population. However, when SCD occurs in an athlete during sporting event or training, it sends shockwaves in the society and raises questions about cardiovascular effects of sports and exercise. This document reviews the causes and mechanism of SCD in sports and exercise in young and older athletes. In the Indian context, we suggest a 'pre-participation screening' of young and older athletes and consider a 'supervised, graded exercise regime' for the uninitiated, older sports participant...
January 2018: Indian Heart Journal
https://www.readbyqxmd.com/read/29387447/prospective-monitoring-of-health-problems-among-recreational-runners-preparing-for-a-half-marathon
#11
Karsten Hollander, Antje Baumann, Astrid Zech, Evert Verhagen
Objectives: While the health benefits of running are legitimately advocated, participation in running can also lead to health problems. There is a high range of reported prevalence rates especially of running-related overuse injuries in high-level athletes and during competition. Little consensus exists for acute injuries and illnesses especially in recreational runners. Therefore, the aim of this study was to record the prevalence of health problems in recreational long-distance runners preparing for an event...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29387445/predictive-ability-of-a-comprehensive-incremental-test-in-mountain-bike-marathon
#12
Marc-Daniel Ahrend, Patrick Schneeweiss, Peter Martus, Andreas M Niess, Inga Krauss
Objectives: Traditional performance tests in mountain bike marathon (XCM) primarily quantify aerobic metabolism and may not describe the relevant capacities in XCM. We aimed to validate a comprehensive test protocol quantifying its intermittent demands. Methods: Forty-nine athletes (38.8±9.1 years; 38 male; 11 female) performed a laboratory performance test, including an incremental test, to determine individual anaerobic threshold (IAT), peak power output (PPO) and three maximal efforts (10 s all-out sprint, 1 min maximal effort and 5 min maximal effort)...
2018: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/29356949/validity-of-the-polar-v800-monitor-for-measuring-heart-rate-variability-in-mountain-running-route-conditions
#13
Pere Caminal, Fuensanta Sola, Pedro Gomis, Eduard Guasch, Alexandre Perera, Núria Soriano, Lluis Mont
PURPOSE: This study was conducted to test, in mountain running route conditions, the accuracy of the Polar V800™ monitor as a suitable device for monitoring the heart rate variability (HRV) of runners. METHOD: Eighteen healthy subjects ran a route that included a range of running slopes such as those encountered in trail and ultra-trail races. The comparative study of a V800 and a Holter SEER 12 ECG Recorder™ included the analysis of RR time series and short-term HRV analysis...
March 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29336959/psychological-attributes-of-ultramarathoners
#14
Katherine Buck, Jack Spittler, Alex Reed, Morteza Khodaee
INTRODUCTION: As the popularity of ultramarathon participation increases, there still exists a lack of understanding of the unique psychological characteristics of ultramarathon runners. The current study sought to investigate some of the psychological and behavioral factors that are involved in ultramarathon running. METHODS: We obtained information from participants of the Bear Chase Trail Race via an online survey. This race is a single-day, multidistance race consisting of a 10 k, half marathon, 50 k, 50 mi, and 100 k run in Lakewood, Colorado, at a base altitude of 1680 m with total altitude in climbs ranging from 663 to 2591 m...
March 2018: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/29325455/influence-of-middle-distance-running-on-muscular-micro-rnas
#15
Elisa Danese, Marco Benati, Fabian Sanchis-Gomar, Cantor Tarperi, Gian Luca Salvagno, Elisa Paviati, Martina Montagnana, Federico Schena, Giuseppe Lippi
A specific subset of micro RNAs (miRs), including miR-133 and miR-206, is specifically expressed in muscle tissue, so that they are currently defined as muscular miRs (myomiRs). To further elucidate the role of myomiRs in muscle biology, we measured miR-133a and miR-206 in plasma of 28 middle-age recreational athletes. The study population consisted of 28 middle aged, recreation athletes (11 women and 17 men; mean age, 46 years) who completed a 21.1 km, half-marathon. The plasma concentration of miR-133a and miR-206, the serum concentration of creatine kinase (CK) and high-sensitivity (HS) cardiac troponin T (cTnT), as well as capillary lactate, were measured before and immediately after the run...
May 2018: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/29315098/anemia-in-athletes-news-on-iron-therapy-and-community-care-during-marathons
#16
E Randy Eichner
No abstract text is available yet for this article.
January 2018: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/29298672/no-association-between-actn3-r577x-and-ace-i-d-polymorphisms-and-endurance-running-times-in-698-caucasian-athletes
#17
Ioannis D Papadimitriou, Sarah J Lockey, Sarah Voisin, Adam J Herbert, Fleur Garton, Peter J Houweling, Pawel Cieszczyk, Agnieszka Maciejewska-Skrendo, Marek Sawczuk, Myosotis Massidda, Carla Maria Calò, Irina V Astratenkova, Anastasia Kouvatsi, Anastasiya M Druzhevskaya, Macsue Jacques, Ildus I Ahmetov, Georgina K Stebbings, Shane Heffernan, Stephen H Day, Robert Erskine, Charles Pedlar, Courtney Kipps, Kathryn N North, Alun G Williams, Nir Eynon
BACKGROUND: Studies investigating associations between ACTN3 R577X and ACE I/D genotypes and endurance athletic status have been limited by small sample sizes from mixed sport disciplines and lack quantitative measures of performance. AIM: To examine the association between ACTN3 R577X and ACE I/D genotypes and best personal running times in a large homogeneous cohort of endurance runners. METHODS: We collected a total of 1064 personal best 1500, 3000, 5000 m and marathon running times of 698 male and female Caucasian endurance athletes from six countries (Australia, Greece, Italy, Poland, Russia and UK)...
January 3, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29259560/the-energetics-during-the-world-s-most-challenging-mountain-ultra-marathon-a-case-study-at-the-tor-des-geants%C3%A2
#18
Aldo Savoldelli, Alessandro Fornasiero, Pietro Trabucchi, Eloisa Limonta, Antonio La Torre, Francis Degache, Barbara Pellegrini, Grégoire P Millet, Gianluca Vernillo, Federico Schena
Purpose: To provide insights into the energy requirements as well as the physiological adaptations of an experienced 50-year-old ultra-marathon male athlete during the world's most challenging mountain ultra-marathon (MUM). Methods: The international race supporting the study was the Tor des Geants®, characterized by 330 km with +24,000 m D+ to be covered within 150 h. Before the MUM, we assessed the peak oxygen uptake ([Formula: see text]) by means of an incremental graded running test. During the MUM we monitored six ascents (once per race day) with a portable gas analyzer, a GPS and a finger pulse oximeter...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29212672/cardiovascular-response-to-prescribed-detraining-among-recreational-athletes
#19
Charles Richard Pedlar, Marcel G Brown, Robert E Shave, James M Otto, Aimee Drane, Jennifer Michaud-Finch, Miranda Contursi, Meagan M Wasfy, Adolph Hutter, Michael H Picard, Gregory D Lewis, Aaron L Baggish
Exercise-induced cardiac remodeling (EICR) and the attendant myocardial adaptations characteristic of the athlete's heart may regress during periods of exercise reduction or abstinence. The time course and mechanisms underlying this reverse remodeling, specifically the impact of concomitant plasma volume (PV) contraction on cardiac chamber size, remain incompletely understood. We therefore studied recreational runners (n=21, aged 34 {plus minus} 7 years; 48% male) who completed an 18-week training program (~7 h...
December 6, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29172394/subchondral-insufficiency-fracture-in-the-lateral-compartment-of-the-knee-in-a-64-year-old-marathon-runner
#20
Vincent Vg An, Mathias van den Broek, Sam Oussedik
A 64-year-old marathon runner presented to our clinic with a history of worsening pain in her left knee. Following magnetic resonance imaging, the diagnosis of subchondral insufficiency fracture of the knee (SIFK) was made. A course of conservative management via bisphosphonates was initiated. The patient successfully recovered and returned to full athletic function, having recently returned to competitive marathon running. This article aims to present this unusual case of lateral compartment SIFK and summarise the literature on this uncommon condition...
December 1, 2017: Knee Surgery & related Research
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