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https://www.readbyqxmd.com/read/27928199/association-of-anxiety-related-polymorphisms-with-sports-performance-in-chilean-long-distance-triathletes-a-pilot-study
#1
Jorge A Sanhueza, Tomás Zambrano, Carlos Bahamondes-Avila, Luis A Salazar
Different factors affecting athletic performance are well established: intensity and type of training, anthropometric characteristics as well as an important psychological component. However, the contribution of the genetic background has been less investigated. The aim of the present study was to investigate the influence of polymorphisms within genes associated with stress and anxiety (5HTT, CRH2R, ACE, NK1R, 5HT1AR and CRF-BP) on the physical capability and sports performance in triathletes. One hundred and ninety two (192) unrelated Chilean triathletes who participated in the 2014 70...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27913923/actn3-x-allele-carriers-had-greater-levels-of-muscle-damage-during-a-half-ironman
#2
Juan Del Coso, Juan José Salinero, Beatriz Lara, César Gallo-Salazar, Francisco Areces, Carlos Puente, David Herrero
PURPOSE: Alpha-actinin-3, encoded by the ACTN3 gene, is an actin-binding protein with an important role in myofibril contraction and muscle force output. In humans, there is a relatively common deficiency of the α-actinin-3 due to homozygosity in a polymorphism of the ACTN3 gene (R577X, rs1815739), that has been related to decreased resistance to strain during voluntary muscle contractions. The purpose of this study was to investigate the influence of the ACTN3 genotype on the level of exercise-induced muscle damage attained by 23 experienced triathletes during an official half-ironman competition...
December 2, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27900191/deaths-in-triathletes-immersion-pulmonary-oedema-as-a-possible-cause
#3
Richard E Moon, Stefanie D Martina, Dionne F Peacher, William E Kraus
BACKGROUND/AIM: To address the question as to whether immersion pulmonary oedema (IPO) may be a common cause of death in triathlons, markers of swimming-induced pulmonary oedema (SIPO) susceptibility were sought in triathletes' postmortem examinations. METHODS: Deaths while training for or during triathlon events in the USA and Canada from October 2008 to November 2015 were identified, and postmortem reports requested. We assessed obvious causes of death; the prevalence of left ventricular hypertrophy (LVH); comparison with healthy triathletes...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27884484/ross-hybrid-arch-and-frozen-elephant-trunk-reconstruction-for-late-complications-of-bicuspid-aortic-valve-and-aortopathy
#4
Matthew Valdis, Gaetano DeRose, Linrui Guo, Michael W A Chu
Young patients with bicuspid aortic valve disease and aortopathy remain a clinical challenge, with many requiring multiple corrective operations throughout their lifetimes. Innovative surgical approaches are often required to address complex aortic pathologic conditions but leave patients at risk for reintervention, lifelong anticoagulation, and suboptimal hemodynamics. We describe an active 44-year-old female triathlete with recurrent bicuspid aortic stenosis, a small aortic root, a hypoplastic aortic arch and complex distal arch, and a descending aortic aneurysm, who underwent a single-stage reconstruction with a combined Ross procedure, hybrid arch, and frozen elephant trunk reconstruction...
December 2016: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/27869661/an-exploratory-investigation-of-endotoxin-levels-in-novice-long-distance-triathletes-and-the-effects-of-a-multi-strain-probiotic-prebiotic-antioxidant-intervention
#5
Justin D Roberts, Craig A Suckling, Georgia Y Peedle, Joseph A Murphy, Tony G Dawkins, Michael G Roberts
Gastrointestinal (GI) ischemia during exercise is associated with luminal permeability and increased systemic lipopolysaccharides (LPS). This study aimed to assess the impact of a multistrain pro/prebiotic/antioxidant intervention on endotoxin unit levels and GI permeability in recreational athletes. Thirty healthy participants (25 males, 5 females) were randomly assigned either a multistrain pro/prebiotic/antioxidant (LAB⁴ANTI; 30 billion CFU·day(-1) containing 10 billion CFU·day(-1)Lactobacillus acidophilus CUL-60 (NCIMB 30157), 10 billion CFU·day(-1)Lactobacillus acidophillus CUL-21 (NCIMB 30156), 9...
November 17, 2016: Nutrients
https://www.readbyqxmd.com/read/27867587/acute-chest-pain-in-a-triathlete-rupture-of-the-noncoronary-sinus-of-valsalva-into-the-right-ventricle
#6
Ernan Zhu, Ralf Westenfeld, Mareike Gastl, Florian Bönner, Alexander Assmann, Amir M Nia, Malte Kelm, Christian Jung
Sinus of Valsalva (SoV) aneurysm is a rare cardiac disease which can be congenital or acquired. A ruptured SoV aneurysm presents a clinical emergency and can lead to progressively deteriorating heart failure. Therefore, appropriate treatment requires prompt and accurate diagnosis. Most ruptured or nonruptured SoV aneurysms are diagnosed by the means of echocardiography. However, cardiovascular magnetic resonance (CMR) can provide information on precise anatomy and mechanisms due to its excellent soft tissue contrast and high resolution, and thereby allows for optimized preoperative planning of the repair strategy...
October 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/27857961/physiologic-and-performance-effects-of-sago-supplementation-before-and-during-cycling-in-a-warm-humid-environment
#7
Mohd Rahimi Che Jusoh, Stephen R Stannard, Toby Mündel
The present study determined whether 0.8g/kg bodyweight sago ingested before (Pre-Sago) or during (Dur-Sago) exercise under warm-humid conditions (30 ± 2°C, 78 ± 3 % RH; 20 km·h(-1) frontal airflow) conferred a performance and/or physiological benefit compared to a control (Control) condition. Eight trained, male cyclists/triathletes (45 ± 4 y, VO2peak: 65 ± 10 ml·kg(-1)·min(-1), peak aerobic power: 397 ± 71 W) completed 3 15-min time-trials (∼75% VO2peak) pre-loaded with 45 min of steady-state (∼55% VO2peak) cycling following > 24 h standardization of training and diet...
April 2016: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/27817192/positive-pacing-in-elite-ironman-triathletes
#8
Nicole Angehrn, Christoph A. Rüst, Pantelis T. Nikolaidis, Thomas Rosemann, Beat Knechtle
Pacing is known to influence athletic performance. For the Ironman triathlon program, a positive pacing strategy, i.e., the continuous decrease of speed over time was recommended. By analyzing split times, we assessed the pacing strategies of the top 100 finishers of the cycling part of 13 Ironman races and of the running part of 11 Ironman races taking place in 2014. Furthermore, sex-associated differences in performance and pacing strategies were calculated. We analyzed 7,687 cycling and 11,894 running split times of 1,392 triathletes (1,263 men, 129 women)...
December 31, 2016: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/27740603/relationship-between-the-ingestion-of-a-polyphenol-rich-drink-hepcidin-hormone-and-long-term-training
#9
Débora Villaño, Cristina Vilaplana, Sonia Medina, Francisco Algaba-Chueca, Roberto Cejuela-Anta, Jose Miguel Martínez-Sanz, Federico Ferreres, Angel Gil-Izquierdo
The effects of polyphenol-rich foods on the iron status of athletes, as well as the effect of physical training on the hormone hepcidin, implicated in iron metabolism, are not clear. We investigated the influence on iron metabolism of a long-term training intervention of 120 days, measuring the hepcidin concentration in the plasma of 16 elite triathletes, and the effect of the ingestion of 200 mL of either aronia-citrus juice or a placebo drink for 45 days, in a crossover design. The highest plasma hepcidin concentrations were observed at the beginning of the study (116 ± 63 nM) and levels steadily decreased until the end of the intervention (final value 10 ± 7...
October 8, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27713956/lipidomic-approach-in-young-adult-triathletes-effect-of-supplementation-with-a-polyphenols-rich-juice-on-neuroprostane-and-f2-dihomo-isoprostane-markers
#10
Libia Alejandra García-Flores, Sonia Medina, Camille Oger, Jean-Marie Galano, Thierry Durand, Roberto Cejuela, José Miguel Martínez-Sanz, Federico Ferreres, Ángel Gil-Izquierdo
The aim of the this study was to determine the effect of a polyphenols-rich juice (aronia-citrus juice, ACJ) on F4-neuroprostanes and F2-dihomo-isoprostanes-markers of oxidative stress associated with the central nervous system (CNS)-in 16 elite triathletes under a controlled diet for triathlon training (145 days). In the triathletes, a decrease of the lipid peroxidation markers after ACJ intake, associated with neuronal membrane degradation (10-epi-10-F4t-neuroprostane and 10-F4t-neuroprostane), was observed when compared with placebo stage values...
October 12, 2016: Food & Function
https://www.readbyqxmd.com/read/27669445/triathletes-lose-their-advantageous-pain-modulation-under-acute-psychosocial-stress
#11
Nirit Geva, Jens Pruessner, Ruth Defrin
INTRODUCTION: Triathletes, who constantly engage in intensely stressful sport, were recently found to exhibit greater pain tolerance and more efficient pain inhibition capabilities than non athletes. However, pain inhibition correlated negatively with retrospective reports of mental stress during training and competition. The aim of the current study was to test pain inhibition capabilities of triathletes under acute, controlled psychological stress manipulation. METHODS: Participants were 25 triathletes and ironman triathletes who underwent the measurement of pain-threshold, pain-intolerance, tonic suprathreshold pain and conditioned pain modulation (CPM) before and during exposure to the Montreal Imaging Stress Task (MIST)...
September 23, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27617566/assessing-overreaching-with-hrr-what-is-the-minimal-exercise-intensity-required
#12
Yann Le Meur, Martin Buchheit, Anaël Aubry, Aaron J Coutts, Christophe Hausswirth
PURPOSE: Faster heart rate recovery (HRR) following high-to-maximal exercise (≥90% HRmax) has been reported in athletes suspected of functional overreaching (f-OR). This study investigated whether this response would also occur at lower exercise intensity. METHODS AND RESULTS: HRR and rate of perceived exertion (RPE) responses were compared during an incremental intermittent running protocol to exhaustion in twenty experienced male triathletes (8 control and 13 overload subjects led to f-OR) before (Pre), immediately after an overload training period (Mid) and following a 1-week taper (Post)...
September 6, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27606953/incidence-of-iron-deficiency-and-iron-deficient-anemia-in-elite-runners-and-triathletes
#13
Alexandra Coates, Margo Mountjoy, Jamie Burr
OBJECTIVE: To assess the incidence of iron deficiency (ID), and iron deficient anemia (IDA) within a cohort of highly trained runners and triathletes, and to examine the association of oral iron supplementation history with serum ferritin (sFe) and hemoglobin (Hb) concentrations. METHODS: A retrospective analysis of routine blood test data taken from 2009 to 2015 from (n = 38) elite level runners and triathletes between the ages of 21 to 36 years. Oral iron supplement intake was assessed through a questionnaire...
September 5, 2016: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/27604138/performance-and-sex-differences-in-isklar-norseman-xtreme-triathlon
#14
Beat Knechtle, Pantelis Theodoros Nikolaidis, Michael Stiefel, Thomas Rosemann, Christoph Alexander Rüst
The performance and sex differences of long-distance triathletes competing in 'Ironman Hawaii' are well investigated. However, less information is available with regards to triathlon races of the Ironman distance held under extreme environmental conditions (e.g. extreme cold) such as the 'Isklar Norseman Xtreme Triathlon' which started in 2003. In 'Isklar Norseman Xtreme Triathlon', athletes swim at a water temperature of ~13-15°C, cycle at temperatures of ~5-20°C and run at temperatures of ~12-28°C in the valley and of ~2-12°C at Mt...
October 31, 2016: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/27511062/the-master-female-triathlete
#15
Janice K Loudon
The world of triathlon has expanded to include all ages and both sexes. One of the largest growing age groups is the master female athlete. It is important for the physical therapist to understand the special needs of this population in order to adequately care for master female athletes so they can participate at a high level and injury-free. Biology of aging, injury prevention and a suggested training program are presented in this Masterclass article.
July 31, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/27504176/anthropometric-profiling-of-new-zealand-junior-elite-triathletes
#16
Bhargav Dave, Asmi Dave, Nilesh Kotecha, Myrtle Oates
INTRODUCTION: The triathlon involves a combination of three separate disciplines-swimming, cycling and running. To date, very few studies have been conducted on the anthropometric characteristics of the New Zealand junior elite triathletes. The aim of this study was to determine the correlation between physical traits of calf girth or sum of eight skinfolds (anthropometry) and running or cycling performances in the triathlon event. METHODS: Eleven junior elite triathletes (6 females, 5 males; (Av...
June 2016: Electronic Physician
https://www.readbyqxmd.com/read/27497835/the-postpartum-triathlete
#17
Jill Thein-Nissenbaum
The postpartum period in a woman's life is filled with numerous changes, including physical changes, changes in sleep habits, and learning how to best care for a newborn. A common goal among postpartum women is to either begin or resume an active lifestyle, which often includes physical activity such as running, biking and swimming. The postpartum athlete may discover barriers that prevent her from returning to or beginning an exercise routine. These obstacles include muscle weakness, fatigue, depression and physical changes that require exercise modification...
September 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/27491620/the-impact-of-sleeping-with-reduced-glycogen-stores-on-immunity-and-sleep-in-triathletes
#18
Julien Louis, Laurie-Anne Marquet, Eve Tiollier, Stéphane Bermon, Christophe Hausswirth, Jeanick Brisswalter
PURPOSE: We investigated the effects of a 3-week dietary periodization on immunity and sleep in triathletes. METHODS: 21 triathletes were divided into two groups with different nutritional guidelines during a 3-week endurance training program including nine twice a day sessions with lowered (SL group) or maintained (CON group) glycogen availability during the overnight recovery period. In addition to performance tests, sleep was monitored every night. Systemic and mucosal immune parameters as well as the incidence of URTI were monitored every week of the training/nutrition protocol...
October 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27486491/pulmonary-aspects-of-exercise-and-sports
#19
Alfred A Bove
Although the lungs are a critical component of exercise performance, their response to exercise and other environmental stresses is often overlooked when evaluating pulmonary performance during high workloads. Exercise can produce capillary leakage, particularly when left atrial pressure increases related to left ventricular (LV) systolic or diastolic failure. Diastolic LV dysfunction that results in elevated left atrial pressure during exercise is particularly likely to result in pulmonary edema and capillary hemorrhage...
April 2016: Methodist DeBakey Cardiovascular Journal
https://www.readbyqxmd.com/read/27485572/a-case-of-recurrent-swimming-induced-pulmonary-edema-in-a-triathlete-the-need-for-awareness
#20
R Smith, D Brooke, C Kipps, B Skaria, V Subramaniam
This report discusses a rare case of a 55-year-old female triathlete who developed recurrent episodes of swimming-induced pulmonary edema (SIPE). She had two hospital admissions with pulmonary edema after developing breathlessness while swimming, including a near-drowning experience in an open water swim. With increasing popularity of triathlon and open water sports, this case highlights the importance of a greater awareness of SIPE among health professionals, event organizers, and athletes. This report explores the previous reported cases in triathletes and those who have suffered recurrent episodes...
August 3, 2016: Scandinavian Journal of Medicine & Science in Sports
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