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https://www.readbyqxmd.com/read/28503322/changes-in-oxidized-ldl-during-a-half-marathon-in-athletes-with-spinal-cord-injuries
#1
Toshihito Mitsui, Tomoyuki Ito, Yusuke Sasaki, Takashi Kawasaki, Takeshi Nakamura, Yukihide Nishimura, Tatsuru Ibusuki, Yukiharu Higuchi, Sayoko Hosoe, Fumiaki Ito, Fumihiro Tajima
INTRODUCTION: We reported previously that exercise significantly increases plasma adrenaline and oxidized low-density lipoprotein (oxLDL) in healthy subjects but not in persons with spinal cord injury (SCI). Since oxLDL and adrenaline levels are associated with oxidant/antioxidant balance, and exercise training elicits production of reactive oxygen species, we elucidated the effects of exercise on adrenaline, oxidant/antioxidant balance and oxLDL in individuals with SCI. CASE PRESENTATION: Eight subjects with cervical spinal cord injury (CSCI) and nine subjects with lower lesion of SCI (lower SCI (LSCI)) participated in a wheelchair half marathon race, and blood samples were collected before (pre), immediately after (post) and 1 h after the race (post 1 h)...
2017: Spinal Cord Series and Cases
https://www.readbyqxmd.com/read/28488940/elite-african-marathoners-specialize-earlier-than-elite-non-african-marathoners
#2
Tyler J Noble, Robert F Chapman
PURPOSE: To assess differences in event specific specialization between elite African and Non-African male marathon runners on the basis of age, performance, and career length. METHODS: The top 90 African marathoners from 2001-2015 were compared to the top 90 Non-African marathoners from the same time period across various markers related to specialization age, performance, and career length. Independent t-tests were used to identify significant differences (P<0...
May 10, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28481126/increased-levels-of-alveolar-and-airway-exhaled-nitric-oxide-in-runners
#3
Alexandra Thornadtsson, Nikola Drca, Fabio Ricciardolo, Marieann Högman
AIM: The objective of this study was to apply extended NO analysis for measurements of NO dynamics in the lung, divided into alveolar and airway contribution, in amateur runners and marathoners. METHODS: The athletes participated in either a marathon or a half marathon. The athletes self-reported their age, weight, height, training distance per week, competing distance, cardio-pulmonary health, atopic status, and use of tobacco. Measurements of exhaled NO (FENO) with estimation of alveolar NO (CANO) and airway flux (JawNO), ventilation, pulse oximetry, and peak flow were performed before, immediately after, and 1 hour after completing the race...
May 8, 2017: Upsala Journal of Medical Sciences
https://www.readbyqxmd.com/read/28475643/a-combination-of-routine-blood-analytes-predicts-fitness-decrement-in-elderly-endurance-athletes
#4
Helmuth Haslacher, Franz Ratzinger, Thomas Perkmann, Delgerdalai Batmyagmar, Sonja Nistler, Thomas M Scherzer, Elisabeth Ponocny-Seliger, Alexander Pilger, Marlene Gerner, Vanessa Scheichenberger, Michael Kundi, Georg Endler, Oswald F Wagner, Robert Winker
Endurance sports are enjoying greater popularity, particularly among new target groups such as the elderly. Predictors of future physical capacities providing a basis for training adaptations are in high demand. We therefore aimed to estimate the future physical performance of elderly marathoners (runners/bicyclists) using a set of easily accessible standard laboratory parameters. To this end, 47 elderly marathon athletes underwent physical examinations including bicycle ergometry and a blood draw at baseline and after a three-year follow-up period...
2017: PloS One
https://www.readbyqxmd.com/read/28465287/prevalence-of-subclinical-coronary-artery-disease-in-masters-endurance-athletes-with-a-low-atherosclerotic-risk-profile
#5
Ahmed Merghani, Viviana Maestrini, Stefania Rosmini, Andrew T Cox, Harshil Dhutia, Rachel Bastiaenen, Sarojini David, Tee Joo Yeo, Rajay Narain, Aneil Malhotra, Michael Papadakis, Mathew G Wilson, Maite Tome, Khaled AlFakih, James C Moon, Sanjay Sharma
Background -Studies in middle aged and older (masters) athletes with atherosclerotic risk factors for coronary artery disease (CAD) report higher coronary artery calcium (CAC) scores compared with sedentary individuals. Few studies have assessed the prevalence of CAD in masters athletes with a low atherosclerotic risk profile. Methods -We assessed 152 masters athletes aged 54.4±8.5 years (70% male) and 92 controls of similar age, sex and low Framingham 10 year CAD risk scores with an echocardiogram, exercise stress test, CT coronary angiogram, and cardiovascular magnetic resonance imaging (CMRI) with late gadolinium enhancement (LGE) and a 24-hour Holter...
May 2, 2017: Circulation
https://www.readbyqxmd.com/read/28443964/effects-of-chronic-exercise-on-endothelial-progenitor-cells-and-microparticles-in-professional-runners
#6
Célia Regina de Oliveira Bittencourt, Maria Cristina de Oliveira Izar, Carolina Nunes França, Valdir Lauro Schwerz, Rui Manuel Dos Santos Póvoa, Francisco Antonio Helfenstein Fonseca
BACKGROUND: The effects of chronic exposure to exercise training on vascular biomarkers have been poorly explored. OBJECTIVE: Our study aimed to compare the amounts of endothelial progenitor cells (EPCs), and endothelial (EMP) and platelet (PMP) microparticles between professional runners and healthy controls. METHODS: Twenty-five half-marathon runners and 24 age- and gender-matched healthy controls were included in the study. EPCs (CD34+/KDR+, CD133+/KDR+, and CD34+/CD133+), EMP (CD51+) and PMP (CD42+/CD31+) were quantified by flow-cytometry...
March 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28416169/pathologic-fracture-of-the-thoracic-spine-in-a-male-master-ultra-marathoner-due-to-the-combination-of-a-vertebral-hemangioma-and-osteopenia
#7
Beat Knechtle, Pantelis T Nikolaidis, Bruno Lutz, Thomas Rosemann, Christian B Baerlocher
Vertebral hemangiomas are the most common benign vertebral neoplasms and are generally asymptomatic. In the present study, we report the case of a 52-year-old male master ultra-marathoner suffering from a pathologic fracture of the thoracic spine due to a vertebral hemangioma. A further examination in the athlete revealed an accompanying osteopenia, which was most likely due to a deficiency in both vitamin D and testosterone. The treatment of the fracture consisted of percutaneous vertebroplasty. Shortly after the operation the athlete was able to continue running...
March 27, 2017: Medicina
https://www.readbyqxmd.com/read/28415084/p260right-cardiac-chambers-remodeling-in-marathon-and-ultra-trail-athletes-detected-by-speckle-tracking-echocardiography
#8
K Ujka, R M Bruno, B Catuzzo, L Bastiani, A Tonacci, G D'angelo, S Mrakic-Sposta, A Vezzoli, G Giardini, L Pratali
Background: Strenuous and chronic exercise training can have detrimental effects on cardiac morphology and function. Our aim was to evaluate the cardiac adaptation between 2 different specialties' endurance athletes: marathon runners (M) and ultra-trailers (UT). Methods: 47 M (age 45±7, men 32; training: 18 (9-53) years*days/week), 41 UT (age 42±9, men 38, training: 30 (15-66) years*days/week) were submitted in rest condition to conventional 2D echocardiography and Speckle-Tracking echo (STE) (Beyond Diogenes 2...
December 1, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28394719/effects-of-strength-explosive-and-plyometric-training-on-energy-cost-of-running-in-ultra-endurance-athletes
#9
Nicola Giovanelli, Paolo Taboga, Enrico Rejc, Stefano Lazzer
The aim of the present study was to evaluate the effects of a 12-week home-based strength, explosive and plyometric (SEP) training on the cost of running (Cr) in well-trained ultra-marathoners and to assess the main mechanical parameters affecting changes in Cr. Twenty-five male runners (38.2 ± 7.1 years; body mass index: 23.0 ± 1.1 kg·m(-2); V˙O2max: 55.4 ± 4.0 mlO2·kg(-1)·min(-1)) were divided into an exercise (EG = 13) and control group (CG = 12). Before and after a 12-week SEP training, Cr, spring-mass model parameters at four speeds (8, 10, 12, 14 km·h(-1)) were calculated and maximal muscle power (MMP) of the lower limbs was measured...
April 10, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28382580/the-dynamics-of-cardiovascular-biomarkers-in-non-elite-marathon-runners
#10
Emma Roca, Lexa Nescolarde, Josep Lupón, Jaume Barallat, James L Januzzi, Peter Liu, M Cruz Pastor, Antoni Bayes-Genis
The number of recreational/non-elite athletes participating in marathons is increasing, but data regarding impact of endurance exercise on cardiovascular health are conflicting. This study evaluated 79 recreational athletes of the 2016 Barcelona Marathon (72% men; mean age 39 ± 6 years; 71% ≥35 years). Blood samples were collected at baseline (24-48 h before the race), immediately after the race (1-2 h after the race), and 48-h post-race. Amino-terminal pro-B type natriuretic peptide (NT-proBNP, a marker of myocardial strain), ST2 (a marker of extracellular matrix remodeling and fibrosis, inflammation, and myocardial strain), and high-sensitivity troponin T (hs-TnT, a marker of myocyte stress/injury) were assayed...
April 5, 2017: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/28348942/biochemistry-in-endeavor-adventure-racers-study-bears
#11
Matthew Wetschler, David Radler, Mark Christensen, Grant Lipman
BACKGROUND:  Adventure sports events consist of a combination of two or more endurance disciplines, such as orienteering, running, and rock climbing, that range from a day's to a week's duration. No studies have examined acute kidney injury (AKI) in adventure sports athletes. OBJECTIVES: To describe the prevalence of AKI in participants in the Endeavor Team Challenge, a 30-hour, 40-mile adventure race. METHODS: In this prospective observational study, body weights were recorded at race registration...
February 11, 2017: Curēus
https://www.readbyqxmd.com/read/28347463/level-of-minerals-and-trace-elements-in-the-urine-of-the-participants-of-mountain-ultra-marathon-race
#12
Jasna Jablan, Suzana Inić, Hagen Stosnach, Maja Ortner Hadžiabdić, Lovorka Vujić, Ana-Marija Domijan
The aim of the present study was to explore impact of endurance exercise on urinary level of minerals and trace elements as well as on some oxidative stress and biochemical parameters. Urine samples were collected from participants (n=21) of mountain ultra-marathon race (53km; Medvednica, Zagreb, Croatia), before (baseline value), immediately after, 12h and 24h after the race. In urine samples level of minerals (Ca, P, K and Na) and trace elements (Se, Zn, Mn, Cu, Fe and Co) were assessed using the bench top Total reflection X-ray Fluorescence (TXRF) spectrometer...
May 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28344459/applied-sports-nutrition-support-dietary-intake-and-body-composition-changes-of-a-female-athlete-completing-26-marathons-in-26-days-a-case-study
#13
Chris J McManus, Kelly A Murray, David A Parry
The aim of this case study is to describe the nutrition practices of a female recreational runner (VO2max 48.9 ml·kg(-1)·min(-1)) who completed 26 marathons (42.195 km) in 26 consecutive days. Information relating to the nutritional intake of female runners during multi-day endurance events is extremely limited, yet the number of people participating year-on-year continues to increase. This case study reports the nutrition intervention, dietary intake, body composition changes and performance in the lead-up and during the 26 days...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28321588/use-of-bioimpedianciometer-as-predictor-of-mountain-marathon-performance
#14
Vicente Javier Clemente-Suarez, Pantelis Theodoros Nikolaidis
This study aimed to examine the relation among body composition, training experience and race time during a mountain marathon. Body composition and training pre-race experience analyses were conducted previous to a mountain marathon in 52 male athletes. A significant correlation between race time and mountain marathon with chronological age, body fat mass, percentage of body fat (BF), level of abdominal obesity, sport experience and daily training volume was revealed. In addition, BF and athlete's chronological age were negatively associated with race performance...
May 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28302687/hspcs-are-marathon-and-not-sprint-relay-athletes
#15
Lambert Busque
No abstract text is available yet for this article.
March 16, 2017: Blood
https://www.readbyqxmd.com/read/28255937/how-biomechanical-improvements-in-running-economy-could-break-the-2-hour-marathon-barrier
#16
REVIEW
Wouter Hoogkamer, Rodger Kram, Christopher J Arellano
A sub-2-hour marathon requires an average velocity (5.86 m/s) that is 2.5% faster than the current world record of 02:02:57 (5.72 m/s) and could be accomplished with a 2.7% reduction in the metabolic cost of running. Although supporting body weight comprises the majority of the metabolic cost of running, targeting the costs of forward propulsion and leg swing are the most promising strategies for reducing the metabolic cost of running and thus improving marathon running performance. Here, we calculate how much time could be saved by taking advantage of unconventional drafting strategies, a consistent tailwind, a downhill course, and specific running shoe design features while staying within the current International Association of Athletic Federations regulations for record purposes...
March 3, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28229566/bioenergetics-and-psychological-profile-of-an-ultra-endurance-walker
#17
Anna Pedrinolla, Giovanni Li Volti, Fabio Galvano, Federico Schena, Valentina Perciavalle, Donatella Di Corrado
BACKGROUND: Ultra endurance walking provides athletes with significant physiological and psychological challenges. In this study ultra endurance walking races are intended as events where the participants have to cover the largest distance within a given time, usually 24, 36, 48 hours, or longer, keeping the pause time within 5% of the total walking time. The aim of the study was to evaluate the metabolic, bioenergetics, and psychological characteristics of a world record ultra endurance walker during three different ultra endurance events characterized by different durations (36h, 48h and 70h)...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28216570/an-electromagnetic-sensor-for-the-autonomous-running-of-visually-impaired-and-blind-athletes-part-i-the-fixed-infrastructure
#18
Marco Pieralisi, Valentina Di Mattia, Valerio Petrini, Alfredo De Leo, Giovanni Manfredi, Paola Russo, Lorenzo Scalise, Graziano Cerri
Sport is one of the best ways to promote the social integration of people affected by physical disability, because it helps them to increase their self-esteem by facing difficulties and overcoming their disabilities. Nowadays, a large number of sports can be easily played by visually impaired and blind athletes without any special supports, but, there are some disciplines that require the presence of a sighted guide. In this work, the attention will be focused on marathons, during which athletes with visual disorders have to be linked to the sighted guide by means of a non-stretchable elbow tether, with an evident reduction of their performance and autonomy...
February 14, 2017: Sensors
https://www.readbyqxmd.com/read/28187185/declines-in-marathon-performance-sex-differences-in-elite-and-recreational-athletes
#19
Gerald S Zavorsky, Kelly A Tomko, James M Smoliga
The first aim of this study was to determine the age group at which marathon performance declines in top male and female runners and to compare that to the runners of average ability. Another aim of this of this study was to examine the age-related yearly decline in marathon performance between age group winners and the average marathon finisher. Data from the New York (NYC), Boston, and Chicago marathons from 2001-2016 were analyzed. Age, sex, and location were used in multiple linear regression models to determine the rate of decline in marathon times...
2017: PloS One
https://www.readbyqxmd.com/read/28181836/volume-exercise-in-older-athletes-influences-inflammatory-and-redox-responses-to-acute-exercise
#20
Andre L Estrela, Aline Zaparte, Jefferson D da Silva, José C Moreira, James E Turner, Moisés E Bauer
To examine whether the volume of previous exercise training in older athletes influences inflammatory, redox and hormonal profiles, forty trained marathon runners were divided into higher-volume (HVG, ~480 min/week) and lower-volume groups (LVG, ~240 min/week). Plasma inflammatory proteins, redox biomarkers and salivary testosterone and cortisol, were assessed at rest and following two maximal acute exercise bouts. At rest, the LVG exhibited higher CRP, higher protein carbonyls and lower SOD activity compared to the HVG (p's<0...
February 9, 2017: Journal of Aging and Physical Activity
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