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John P Martin-Beaulieu, Karen M Myrick, Thomas Martin, Rachel W Pata, Richard S Feinn
Electrocardiographic changes can be present in marathon runners. These findings may be misinterpreted as malignant by healthcare providers. For example, incomplete right bundle branch block, early ventricular repolarization, and left ventricular hypertrophy by voltage criteria alone are quite common in athletes, yet considered benign.
October 2016: Clinical Case Reports
Viola Grabs, Anna Kersten, Bernhard Haller, Siegmund Braun, David C Nieman, Martin Halle, Johannes Scherr
INTRODUCTION: Vigorous and prolonged exercise such as marathon running increases inflammatory markers and the risk of upper respiratory illness (URI) in athletes. Nutritional supplements are being tested as countermeasures of exercise-induced inflammation and immune dysfunction. METHODS: In this prospective randomized, double-blind, placebo-controlled Phase I trial, healthy male runners (N = 138, age 42 ± 11 y) were supplemented with rutoside (600-1200 mg/day) and hydrolytic enzymes (540-1,080 mg/day bromelain, 288-576 mg/day trypsin) (WOB) or placebo (PL) for one week before and two weeks after the Munich Marathon 2013...
October 6, 2016: Medicine and Science in Sports and Exercise
Markus Niemelä, Päivikki Kangastupa, Onni Niemelä, Risto Bloigu, Tatu Juvonen
BACKGROUND: Strenuous physical activity activates the participant's immune responses; however, few studies exist, observing exercise-induced simultaneous changes in mediators of inflammation. METHODS: We examined individual responses in soluble urokinase-type plasminogen activator receptor (suPAR), a marker of immune activation, soluble endocytic receptor for haptoglobin-hemoglobin complexes (CD163), a marker of monocyte-macrophage activation, C-reactive protein (CRP), and pro- and anti-inflammatory cytokines from blood samples drawn at baseline, at 3- and 48-h post-races from recreational runners who successfully completed the marathon (199 ± 8 min, n = 4) or half-marathon (132 ± 4 min, n = 4) run...
December 2016: Sports Medicine—Open
Daniel S Hill, Kuntal Patel, Deepak Herlekar
BACKGROUND: Highly cross-linked polyethylene in total hip arthroplasty (THA) has been shown to decrease wear rate compared with a conventional polyethylene liner. However, it has also been reported that the manufacturing processes can cause early failure of the implant. CASE: We describe early catastrophic failure at <4 years following primary THA surgery of a PINNACLE MARATHON® polyethylene acetabular liner resulting from a malaligned PINNACLE DUOFIX HA® acetabular shell with resultant point loading...
October 13, 2016: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
Kaushik Hatti, Ashutosh Gulati, Narayanaswamy Srinivasan, M R N Murthy
During the past decade, the authors have collected a few X-ray diffraction data sets from protein crystals that appeared to be easy cases of molecular replacement but failed to yield structures even after extensive trials. Here, the use of a large-scale molecular replacement method that explores all structurally characterized domains as phasing models to determine the structure corresponding to two data sets collected at 1.9 and 2.3 Å resolution is reported. These two structures were of the same protein independently crystallized in 2007 and 2011...
October 1, 2016: Acta Crystallographica. Section D, Structural Biology
Sarah Henderson, Tina Smith, Jenny Alexanders, Thomas Shaw, Lois Smith, Alan Nevill, Anna Anderson
OBJECTIVE: To investigate half marathon runners' frequency of use of recovery strategies, perceptions regarding the most beneficial recovery strategy and reasons for using recovery strategies. DESIGN: Cross-sectional survey. PARTICIPANTS: 186 participants of the 13.1 mile BUPA Great North Run 2013. METHODS: A questionnaire was developed which required participants to indicate how frequently they used twelve different recovery strategies, identify which recovery strategy they believed to be most beneficial and rank six reasons for using recovery strategies in order of importance...
September 26, 2016: Journal of Sport Rehabilitation
Thijs Maria Anne Ackermans, Gaspar Epro, Christopher McCrum, Kai Daniel Oberländer, Frank Suhr, Maarten Robert Drost, Kenneth Meijer, Kiros Karamanidis
PURPOSE: We aimed to determine whether there are different changes in Achilles tendon (AT) mechanical properties in middle-aged, compared to younger runners that might indicate that tendon fatigue, induced by long-distance running, is age-dependent. METHODS: 27 middle-aged (50-67 years) and 22 younger (21-29 years) participants ran a 21 km route at their own pace (mean and SD: old: 3.1 ± 0.3 m s(-1); young: 3.6 ± 0.5 m s(-1)). We tested for changes in the AT force-elongation relationship using dynamometry and ultrasonography during isometric voluntary ankle plantarflexion ramp contractions, conducted 20-28 h pre-run, immediately pre-run, immediately post-run and 20-28 h post-run...
September 30, 2016: European Journal of Applied Physiology
P Á Latorre-Román, F García Pinillos, P Bujalance-Moreno, V M Soto-Hermoso
The main purpose of this study was to evaluate running kinematic characteristics and foot strike patterns (FSP) during early and late stages of actual and common high-intensity intermittent training (HIIT): 5 × 2000 m with 120-s recovery between runs. Thirteen healthy, elite, highly trained male endurance runners participated in this study. They each had a personal record in the half-marathon of 70 ± 2.24 min, and each had a minimum experience of 4 years of training and competition. Heart rate (HR) and rate of perceived exertion (RPE) were monitored during HIIT...
August 11, 2016: Journal of Sports Sciences
Svetlana Dougoud, Emanuela Valsangiacomo Buechel, Christian J Kellenberger, Kurt A Mayer
No abstract text is available yet for this article.
September 27, 2016: European Heart Journal
Michael Deuschle, Ulrike Gotthardt, Ulrich Schweiger, Michael Dettling, Florian Holsboer, Isabella Heuser
Animal studies suggest that repeated episodes of elevated glucocorticoids lead to a dysregulation of the hypothalamus-pituitary-adrenal (HPA) system at a supra-pituitary level, and to impaired mnemonic function. We compared cognitive tests and both, feedback integrity and stress responsivity of the HPA system, between 11 elderly, male marathon runners - a model of repeated HPA system activation - and 10 sedentary controls. Marathon runners had significantly increased baseline, stress and post-stress ACTH, but not cortisol concentrations...
September 28, 2016: Neuroendocrinology
Paul M Vanderburgh
INTRODUCTION/PURPOSE: This study's purpose was to develop and employ a technique to determine the fastest masters marathon world records (WR), ages 35-79 years, adjusted for age (WRadj). METHODS: From single-age WR data, a best-fit polynomial curve (WRpred1) was developed for the larger age range of 29-80 years for women and 30-80 years for men to improve curve stability in the 35-79 years range. Due to the relatively large degree of data scatter about the curve and the resultant age bias in favor of older runners, a subsample was constituted consisting of those with the lowest WR/WRpred1 ratio within each five-year age group (N = 11)...
2016: SpringerPlus
Diana Horta, Valenti Puig, Luigi Melcarne
Running is popular. Ischemic colitis has been reported in marathon runners. We present a case of an amateur runner who developed ischemic colitis after a relatively short run.
July 2016: Revista Española de Enfermedades Digestivas
Nickolas M Jones, Dana Rose Garfin, E Alison Holman, Roxane Cohen Silver
Traditional and new media inform and expose the public to potentially distressing graphic content following disasters, but predictors of media use have received limited attention. We examine media-use patterns after the Boston Marathon bombings (BMB) in a representative national U.S. sample (n = 2888), with representative oversamples from metropolitan Boston (n = 845) and New York City (n = 941). Respondents completed an Internet-based survey 2-4 weeks post-BMB. Use of traditional media was correlated with older age, prior indirect media-based exposure to collective traumas, and direct BMB exposure...
September 2016: American Journal of Community Psychology
Jasper Reenalda, Erik Maartens, Lotte Homan, J H Jaap Buurke
Recent developments in wearable and wireless sensor technology allow for a continuous three dimensional analysis of running mechanics in the sport specific setting. The present study is the first to demonstrate the possibility of analyzing three dimensional (3D) running mechanics continuously, by means of inertial magnetic measurement units, to objectify changes in mechanics over the course of a marathon. Three well trained male distance runners ran a marathon while equipped with inertial magnetic measurement units on trunk, pelvis, upper legs, lower legs and feet to obtain a 3D view of running mechanics and to asses changes in running mechanics over the course of a marathon...
October 3, 2016: Journal of Biomechanics
Markus Niemelä, Päivikki Kangastupa, Onni Niemelä, Risto Bloigu, Tatu Juvonen
Although strenuous physical activity is known to cause notable perturbations in blood chemistries, only few studies exist observing exercise-induced simultaneous changes in biomarkers of health status. We compared markers of muscle, cardiovascular, renal, hepatic and inflammatory status at baseline and at 3-h and at 48-h postrace in recreational runners who successfully completed either a marathon (mean age 27 ± 13 years, finishing time 199 ± 8 min, n = 4) or half-marathon (mean age 38 ± 13 years, finishing time 131 ± 6 min, n = 6) race...
November 2016: Scandinavian Journal of Clinical and Laboratory Investigation
Fabian Proft, Mathias Grunke, Christiane Reindl, Markus A Schramm, Felix Mueller, Maximilian Kriegmair, Jan Leipe, Peter Weinert, Hendrik Schulze-Koops, Matthias Witt
No abstract text is available yet for this article.
2016: BMC Musculoskeletal Disorders
Gabriela Narowska, Amanda Lafalce, David Jou, Kelly Malloy, Rachel Pata, John Martin-Beaulleu, Karen Myrick, Richard Feinn, Thomas Martin
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Gerald S Zavorsky, Kelly-Ann Tomko, James M Smoliga
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Pierre Andonian, Magalie Viallon, Caroline Le Goff, Charles de Bourguignon, Charline Tourel, Jérome Morel, Guido Giardini, Laurent Gergelé, Grégoire P Millet, Pierre Croisille
In sports medicine, there is increasing interest in quantifying the elastic properties of skeletal muscle, especially during extreme muscular stimulation, to improve our understanding of the impact of alterations in skeletal muscle stiffness on resulting pain or injuries, as well as the mechanisms underlying the relationships between these parameters. Our main objective was to determine whether real-time shear-wave elastography (SWE) can monitor changes in quadriceps muscle elasticity during an extreme mountain ultra-marathon, a powerful mechanical stress model...
2016: PloS One
Feifei Li, Jinlei Nie, Yifan Lu, Tom Kwok Keung Tong, Longyan Yi, Huiping Yan, Frank Hoo Kin Fu, Shengxia Ma
PURPOSE: To investigate the effects of hypoxic training on redox status and cardiac troponin (cTn) release after intermittent exercise. METHOD: Nine well-trained male marathon runners (age, 21.7 ± 2.3 year; body mass, 64.7 ± 4.8 kg; height, 177.9 ± 3.8 cm; and VO2max, 64.3 ± 6.7 ml kg(-1) min(-1)) completed intermittent exercise under normoxic [trial N; fraction of inspiration oxygen (FIO2), 21.0 %] and hypoxic (trial H; FIO2, 14.4 %) conditions in random order...
October 2016: European Journal of Applied Physiology
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