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https://www.readbyqxmd.com/read/29667034/thermal-comfort-along-the-marathon-course-of-the-2020-tokyo-olympics
#1
Tsuyoshi Honjo, Yuhwan Seo, Yudai Yamasaki, Nobumitsu Tsunematsu, Hitoshi Yokoyama, Hiroaki Yamato, Takehiko Mikami
The Olympic Games will be held in Tokyo in 2020 and the period will be the hottest period of the year in Japan. Marathon is a sport with a large heat load, and it is said that the risk of heat stroke rises more than other sports activities. The thermal environment of the 2020 Tokyo Olympic marathon course is analyzed by using wet-bulb globe temperature (WBGT) and Universal Thermal Climate Index (UTCI) map of the center area of Tokyo. The change due to the place, the effect of the shadow of the building, and the position on the course was analyzed from the distribution of WBGT and UTCI in the short-term analysis of sunny day from August 2 to August 6, 2014...
April 17, 2018: International Journal of Biometeorology
https://www.readbyqxmd.com/read/29651253/a-lactate-kinetics-method-for-assessing-the-maximal-lactate-steady-state-workload
#2
Gernot O Hering, Ewald M Hennig, Hartmut J Riehle, Jens Stepan
During a continuously increasing exercise workload (WL) a point will be reached at which arterial lactate accumulates rapidly. This so-called lactate threshold (LT) is associated with the maximal lactate steady state workload (MLSSW ), the highest WL, at which arterial lactate concentration [LA] does not change. However, the physiological range in which the LT and the MLSSW occur has not been demonstrated directly. We used minor WL variations in the MLSSW range to assess arterial lactate kinetics in 278 treadmill and 148 bicycle ergometer exercise tests...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29643999/sympatho-adrenergic-activation-by-endurance-exercise-effect-on-metanephrines-spillover-and-its-role-in-predicting-athlete-s-performance
#3
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/29620398/people-in-more-racially-diverse-neighborhoods-are-more-prosocial
#4
Jared Nai, Jayanth Narayanan, Ivan Hernandez, Krishna Savani
Five studies tested the hypothesis that people living in more diverse neighborhoods would have more inclusive identities, and would thus be more prosocial. Study 1 found that people residing in more racially diverse metropolitan areas were more likely to tweet prosocial concepts in their everyday lives. Study 2 found that following the 2013 Boston Marathon bombings, people in more racially diverse neighborhoods were more likely to spontaneously offer help to individuals stranded by the bombings. Study 3 found that people living in more ethnically diverse countries were more likely to report having helped a stranger in the past month...
April 2018: Journal of Personality and Social Psychology
https://www.readbyqxmd.com/read/29607767/femoral-neck-stress-fracture-in-a-female-runner
#5
Meghan A Lamothe, James M Elliott, Alison H Chang
A 23-year-old woman was referred to physical therapy by her primary care physician for a 4-week history of right groin pain that had progressively worsened while training for a half-marathon. Before the physical therapy referral, the primary care physician ordered radiography of the right hip, which was unremarkable for fracture. Following examination, the physical therapist suspected osseous or soft tissue abnormality and requested that the primary care physician order magnetic resonance imaging without contrast, which revealed a femoral neck stress fracture...
April 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29599724/age-predicted-maximal-heart-rate-in-recreational-marathon-runners-a-cross-sectional-study-on-fox-s-and-tanaka-s-equations
#6
Pantelis T Nikolaidis, Thomas Rosemann, Beat Knechtle
Age-based prediction equations of maximal heart rate (HRmax ), such as the popular formulas Fox's 220-age, or Tanaka's 208-0.7 × age, have been widely used in various populations. Surprisingly, so far these equations have not been validated in marathon runners, despite the importance of the role of HRmax for training purposes in endurance running. The aim of the present study was to examine the validity of Fox and Tanaka equations in a large sample of women and men recreational marathon runners. Participants ( n = 180, age 43...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29590445/atlantoaxial-instability-in-a-patient-with-neck-pain-and-ankylosing-spondylitis
#7
Christian Lyons, Michael Ross, Ryan Elliott, Michael Tall
The purpose of this report is to describe the evaluation and treatment of a patient with neck pain and ankylosing spondylitis who had underlying atlantoaxial instability. The patient was a 31-yr-old man diagnosed with ankylosing spondylitis 1 yr prior who was referred to a physical therapist for the treatment of chronic, worsening low back and hip pain. He also had secondary complaints of neck, upper back, and shoulder pain. The patient worked as a military pilot. As part of the patient's physical examination, a Sharp-Purser test was performed, which was positive for excessive motion...
March 26, 2018: Military Medicine
https://www.readbyqxmd.com/read/29589405/static-and-dynamic-plantar-pressure-distribution-in-amateur-marathon-runners
#8
Arletta Hawrylak, Paweł Matner, Aneta Demidaś, Katarzyna Barczyk-Pawelec, Ewa Demczuk-Włodarczyk
BACKGROUND: The aim of the study was to compare the static and dynamic plantar pressure profiles of amateur marathon runners with sedentary cohorts. RESEARCH QUESTIONS: Are there differences in the plantar pressures of these two populations? Is there a correlation between body mass and BMI with plantar loading? METHODS: The study involved 43 runners involved in marathon training and 30 age-matched untrained individuals. Plantar pressure was measured using a baropodometric system...
March 27, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29588114/post-marathon-cardiac-troponin-t-is-associated-with-relative-exercise-intensity
#9
A J Richardson, T Leckie, E R Watkins, D Fitzpatrick, R Galloway, R Grimaldi, P Baker
OBJECTIVES: This study aimed to investigate whether measures of cardiopulmonary fitness and relative exercise intensity were associated with high sensitivity cardiac troponin T (cTnT) rise after a road marathon. METHODS: Fifty-two marathon runners (age 39±11 years, body mass 76.2±12.9kg, height 1.74±0.09m) attended the laboratory between 2 and 3 weeks prior to attempting the Brighton Marathon, UK. Running economy at 10kmh-1 (RE10) and race pace (RERP), ventilatory threshold (VT) and VO2 max tests were completed...
March 2, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29570600/the-age-of-peak-marathon-performance-in-cross-country-skiing-the-engadin-ski-marathon
#10
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/29569761/the-ripple-effect-health-and-community-perceptions-of-the-indigenous-marathon-program-on-thursday-island-in-the-torres-strait-australia
#11
Rona Macniven, Suzanne Plater, Karla Canuto, Michelle Dickson, Josephine Gwynn, Adrian Bauman, Justin Richards
ISSUE ADDRESSED: Physical inactivity is a key health risk among Aboriginal and Torres Strait Islander (Indigenous) Australians. We examined perceptions of the Indigenous Marathon Program (IMP) in a remote Torres Strait island community. METHODS: Semi-structured interviews with community and program stakeholders (n = 18; 14 Indigenous) examined barriers and enablers to running and the influence of the IMP on the community. A questionnaire asked 104 running event participants (n = 42 Indigenous) about their physical activity behaviours, running motivation and perceptions of program impact...
February 19, 2018: Health Promotion Journal of Australia
https://www.readbyqxmd.com/read/29558432/a-low-cost-tracking-system-for-running-race-applications-based-on-bluetooth-low-energy-technology
#12
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
#13
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
#14
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/29541132/high-sensitivity-cardiac-troponin-t-release-after-a-single-bout-of-high-intensity-interval-exercise-in-experienced-marathon-runners
#15
Feifei Li, Longyan Yi, Huiping Yan, Xuejing Wang, Jinlei Nie, Haifeng Zhang, Frank Hoo Kin Fu, Yanpeng Zang, Shuo Yang, Yifan Lu
Objective: The purpose of this study was to investigate the effects of a single bout of high-intensity interval exercise (HIIE) on high-sensitivity cardiac troponin T (hs-cTnT) release and to explore the potential influencing factors. Methods: Twenty-one experienced marathon runners completed HIIE on treadmill. Each bout of HIIE included a hard run (15.8 ± 1.3 km·h-1 ) at 90% vVO2max for 2 min followed by an easy run (8.8 ± 0.7 km·h-1 ) at 50% vVO2max for 2 min performed 23 times within 92 min...
December 2017: Journal of Exercise Science and Fitness
https://www.readbyqxmd.com/read/29535560/age-of-peak-performance-in-50-km-ultramarathoners-is-it-older-than-in-marathoners
#16
Pantelis Theodoros Nikolaidis, Beat Knechtle
Purpose: Despite the increasing popularity of 50-km ultramarathons during the last few years, only limited information is available regarding the trends in its performance and participation. The aim of the present study was to examine the age of peak running performance in female and male 50-km ultramarathoners using second-order nonlinear regression analyses. Methods: Data from 494,414 runners (124,045 women and 370,369 men) who finished a 50-km ultramarathon between 1975 to 2016 were analyzed...
2018: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/29534444/protein-supplementation-during-or-following-a-marathon-run-influences-post-exercise-recovery
#17
Michael J Saunders, Nicholas D Luden, Cash R DeWitt, Melinda C Gross, Amanda Dillon Rios
The effects of protein supplementation on the ratings of energy/fatigue, muscle soreness [ascending (A) and descending (D) stairs], and serum creatine kinase levels following a marathon run were examined. Variables were compared between recreational male and female runners ingesting carbohydrate + protein (CP) during the run (CPDuring , n = 8) versus those that were consuming carbohydrate (CHODuring, n = 8). In a second study, outcomes were compared between subjects who consumed CP or CHO immediately following exercise [CPPost ( n = 4) versus CHOPost ( n = 4)]...
March 10, 2018: Nutrients
https://www.readbyqxmd.com/read/29526077/sex-differences-in-the-age-of-peak-marathon-race-time
#18
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...
March 12, 2018: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/29508987/elucidating-the-structures-of-amyloid-oligomers-with-macrocyclic-%C3%AE-hairpin-peptides-insights-into-alzheimer-s-disease-and-other-amyloid-diseases
#19
Adam G Kreutzer, James S Nowick
In the more than a century since its identification, Alzheimer's disease has become the archetype of amyloid diseases. The first glimpses of the chemical basis of Alzheimer's disease began with the identification of "amyloid" plaques in the brain in 1892 and extended to the identification of proteinaceous fibrils with "cross-β" structure in 1968. Further efforts led to the discovery of the β-amyloid peptide, Aβ, as a 40- or 42-amino acid peptide that is responsible for the plaques and fibrils...
March 6, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29504064/media-effects-in-youth-exposed-to-terrorist-incidents-a-historical-perspective
#20
REVIEW
Betty Pfefferbaum, Phebe Tucker, Rose L Pfefferbaum, Summer D Nelson, Pascal Nitiéma, Elana Newman
PURPOSE OF REVIEW: This paper reviews the evidence on the relationship between contact with media coverage of terrorist incidents and psychological outcomes in children and adolescents while tracing the evolution in research methodology. RECENT FINDINGS: Studies of recent events in the USA have moved from correlational cross-sectional studies examining primarily television coverage and posttraumatic stress reactions to longitudinal studies that address multiple media forms and a range of psychological outcomes including depression and anxiety...
March 5, 2018: Current Psychiatry Reports
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