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https://www.readbyqxmd.com/read/29332730/biomechanical-factors-associated-with-running-economy-and-performance-of-elite-kenyan-distance-runners-a-systematic-review
#1
REVIEW
Nassib Tawa, Quinette Louw
BACKGROUND: Running economy (RE) is a determinant of performance in endurance sports and is a complex multi-factorial measure which reflects the combined functioning of bio-mechanical, neuro-muscular, metabolic and cardio-respiratory factors some of which are hereditary or adapt to coaching. Kenyan distance runners have dominated major global events with their unmatched performance for decades and this phenomenon has prompted several investigations aimed at establishing possible factors associated with their performance...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29327140/children-s-experiences-of-congenital-heart-disease-a-systematic-review-of-qualitative-studies
#2
REVIEW
Lauren S H Chong, Dominic A Fitzgerald, Jonathan C Craig, Karine E Manera, Camilla S Hanson, David Celermajer, Julian Ayer, Nadine A Kasparian, Allison Tong
We aimed to describe the experiences of children and adolescents with congenital heart disease (CHD). Electronic databases were searched until August 2016. Qualitative studies of children's perspectives on CHD were included. Data was extracted using thematic synthesis. From 44 studies from 12 countries involving 995 children, we identified 6 themes: disrupting normality (denying the diagnosis, oscillating between sickness and health, destabilizing the family dynamic), powerlessness in deteriorating health (preoccupation with impending mortality, vulnerability to catastrophic complications, exhaustion from medical testing), enduring medical ordeals (traumatized by invasive procedures, disappointed by treatment failure, displaced by transition, valuing empathy and continuity in care, overcoming uncertainty with information), warring with the body (losing stamina, distressing inability to participate in sport, distorted body image, testing the limits), hampering potential and goals (feeling disabled, unfair judgment and exclusion, difficulties with academic achievement, limiting attainment and maintenance of life milestones), and establishing one's own pace (demarcating disease from life, determination to survive, taking limitations in their stride, embracing the positives, finding personal enrichment, relying on social or spiritual support)...
January 11, 2018: European Journal of Pediatrics
https://www.readbyqxmd.com/read/29311763/the-acute-effects-of-a-multi-ingredient-pre-workout-supplement-on-resting-energy-expenditure-and-exercise-performance-in-recreationally-active-females
#3
Michael Cameron, Clayton L Camic, Scott Doberstein, Jacob L Erickson, Andrew R Jagim
Background: The use of dietary supplements to improve performance is becoming increasingly popular among athletes and fitness enthusiasts. Unfortunately, there is a tremendous lack of research being done regarding female athletes and the use of sport supplements. The purpose of this study was to examine the acute effects of multi-ingredient pre-workout supplement (MIPS) ingestion on resting metabolism and exercise performance in recreationally-active females. Methods: Fifteen recreationally-active females participated in a randomized, double-blind, placebo controlled study...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29305709/influence-of-physical-activity-on-the-immune-system-in-breast-cancer-patients-during-chemotherapy
#4
Thorsten Schmidt, Walter Jonat, Daniela Wesch, Hans-Heinrich Oberg, Sabine Adam-Klages, Lisa Keller, Christoph Röcken, Christoph Mundhenke
PURPOSE: Physical activity can impact the immune system in different ways, e.g. by alteration of the humoral and cellular immune response. Physical activity at medium intensity enhances numbers of cytotoxic T cells, NK cells and macrophages in healthy people. The aim of this study was to compare the effects of endurance and resistance training on the immune system in breast cancer patients during adjuvant chemotherapy. METHODS: In a prospective, controlled and randomized intervention exploratory trial, 12-week supervised endurance or resistance training were compared with usual care twice a week...
January 5, 2018: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/29305667/a-pilot-study-comparing-the-metabolic-profiles-of-elite-level-athletes-from-different-sporting-disciplines
#5
Fatima Al-Khelaifi, Ilhame Diboun, Francesco Donati, Francesco Botrè, Mohammed Alsayrafi, Costas Georgakopoulos, Karsten Suhre, Noha A Yousri, Mohamed A Elrayess
BACKGROUND: The outstanding performance of an elite athlete might be associated with changes in their blood metabolic profile. The aims of this study were to compare the blood metabolic profiles between moderate- and high-power and endurance elite athletes and to identify the potential metabolic pathways underlying these differences. METHODS: Metabolic profiling of serum samples from 191 elite athletes from different sports disciplines (121 high- and 70 moderate-endurance athletes, including 44 high- and 144 moderate-power athletes), who participated in national or international sports events and tested negative for doping abuse at anti-doping laboratories, was performed using non-targeted metabolomics-based mass spectroscopy combined with ultrahigh-performance liquid chromatography...
January 5, 2018: Sports Medicine—Open
https://www.readbyqxmd.com/read/29305652/-doping-with-illegal-and-legal-substances-in-old-age
#6
REVIEW
Thomas Münzer
The number of old persons who participate in sports and can even achieve peak performances is increasing steadily. Normal aging, however, is associated with decreased muscle strength and a decline in cardiovascular endurance even in those persons who regularly participate in sports. Thus, it seems obvious to impact on muscle mass and muscle strength by using anabolic substances. The number of older persons who illegally use doping substances is currently unknown. Besides classical anabolic drugs, other proteins and amino acids are used to impact on muscle mass or strength...
January 5, 2018: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/29298672/no-association-between-actn3-r577x-and-ace-i-d-polymorphisms-and-endurance-running-times-in-698-caucasian-athletes
#7
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/29282696/cardiac-biomarkers-release-in-preadolescent-athletes-after-an-high-intensity-exercise
#8
A Peretti, L Mauri, A Masarin, G Annoni, A Corato, A Maloberti, Cristina Giannattasio, G Vignati
INTRODUCTION: An elevation of cardiac troponins has been described in healthy athletes after endurance exercises. The clinical significance of this increase is unclear and the lack of awareness of this phenomenon may lead to inappropriate management of these subjects. AIM: We sought to determine wether an intensive cycling training could determine a biomarkers elevation. METHODS: We evaluated serum high sensitivity cardiac troponin T, NH(2)-terminal pro-brain natriuretic peptide, CK-MB and CK in 21 healthy male preadolescent athletes (age 9...
December 27, 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/29281145/the-prevalence-and-severity-of-health-problems-in-youth-elite-sports-a-6-month-prospective-cohort-study-of-320-athletes
#9
C H Moseid, G Myklebust, M W Fagerland, B Clarsen, R Bahr
Little is known regarding the overall health of youth elite athletes. Our aim was to describe the prevalence and severity of health problems in a cohort of youth elite athletes representing a variety of endurance, team and technical sports. Elite sport athletes (N=260, 16.2 yrs) from different Sport Academy High Schools in Norway, and a group of their teammates (N=60, 16.4 yrs) attending regular high schools, were included in the study. The Oslo Sports Trauma Research Centre (OSTRC) questionnaire on health problems was used to self report injuries and illnesses for 26 weeks...
December 27, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29251084/further-evidence-for-an-external-focus-of-attention-in-running-looking-at-specific-focus-instructions-and-individual-differences
#10
Antje Hill, Linda Schücker, Norbert Hagemann, Bernd Strauß
Although attentional focusing in sports has been broadly investigated, the findings vary when it comes to endurance sports. This study provides a comparison between relevant foci in the literature of running economy. These include two internal foci-one addressing automated processes (running movement) and the other nonautomated processes (internal body signals and perceived exertion), an external focus (video) and a control condition. Furthermore, we investigated the influence of interoceptive sensitivity on oxygen consumption within the different attention conditions...
December 18, 2017: Journal of Sport & Exercise Psychology
https://www.readbyqxmd.com/read/29249084/return-to-sport-in-athletes-with-midportion-achilles-tendinopathy-a-qualitative-systematic-review-regarding-definitions-and-criteria
#11
REVIEW
Bas Habets, Anke G van den Broek, Bionka M A Huisstede, Frank J G Backx, Robert E H van Cingel
BACKGROUND: Midportion Achilles tendinopathy (AT) can cause long-term absence from sports participation, and shows high recurrence rates. It is important that the decision to return to sport (RTS) is made carefully, based on sharply delimited criteria. Lack of a well-defined definition and criteria hampers the decision to RTS among athletes with AT, and impedes comparison of RTS rates between different studies. OBJECTIVE: The aim of this study was to systematically review the literature for definitions of, and criteria for, RTS in AT research...
December 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29214921/heteropterys-tomentosa-a-juss-toxicological-and-adaptogenic-effects-in-experimental-models
#12
Géssica Alves Fraga, Sikiru Olaitan Balogun, Emilly Della Pascqua, Ruberlei Godinho de Oliveira, Guilherme Botelho, Eduarda Pavan, Thiago da Rosa Lima, Eudes Thiago Pereira Avila, Clarissa de Medeiros Amorim Krueger, Valdir Cechinel Filho, Amílcar Sabino Damazo, Domingos Tabajara de Oliveira Martins, Fabrício Azevedo Voltarelli
BACKGROUND: The constant pursuit of improved athletic performance characterizes high-performance sport and the use of medicinal plants as dietary supplements is becoming widespread among athletes to enhance long-term endurance performance. AIM: The present study evaluated the toxicity of Heteropterys tomentosa (HEHt) and its acute adaptogenic effects. METHODS: The in vitro safety profile was evaluated on CHO-k1 cells using the alamar Blue assay, at concentrations ranging from 3...
December 2017: Nutrition and Health
https://www.readbyqxmd.com/read/29204950/-physiotherapy-in-pain-medicine-further-treatment-after-a-multimodal-pain-therapy-program
#13
Elisabeth Dean
BACKGROUND: Chronic pain is a global health challenge for both the individual patient and the healthcare community. Multimodal Pain Management, as one of the possible therapies for patients with chronic pain, provides a comprehensive tool that places equally high demands on therapists and patients and is consistently recommended. METHOD: In a monocentric cross-sectional study, patients who had previously participated in a multi-modal pain therapy program lasting several weeks were asked about the follow-up recommendations of the interdisciplinary team of the Pain Management Clinic...
December 2017: MMW Fortschritte der Medizin
https://www.readbyqxmd.com/read/29199781/velocity-distribution-of-women-s-30-km-cross-country-skiing-during-olympic-games-from-2002-2014
#14
Wlodzimierz S Erdmann, Dorota Dancewicz-Nosko, Vasilios Giovanis
BACKGROUND: Within several investigated endurance sport disciplines the distribution of load of the best competitors has a manner of evenly or slightly rising velocity values. Unfortunately many other competitors have usually diminishing values or when they are very poor they have evenly values. The aim of this study was to investigate distribution of velocity within 30-km cross-country female skiers. METHODS: Cross-country skiing runs were investigated of Olympic Games 2002-2014 (Salt Lake City, Turin, Vancouver, Sochi)...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29198116/characterization-and-detection-of-epo-fc-fusion-proteins-using-lc-ms
#15
Natalia V Mesonzhnik, Pavel V V Postnikov, Svetlana A Appolonova, Grigory I Krotov
EPO-Fc fusion proteins are potential drug candidates that have been designed for the treatment of anaemia in humans by stimulating erythrocyte production. Such compounds can be considered performance enhancing agents that may be used by athletes in endurance sports. This study describes the primary structure of commercially available EPO-Fc based on comprehensive liquid-chromatography coupled with mass-spectrometry (LC-MS) analysis. A bottom-up approach and the intact molecular weight (MW) measurement of deglycosylated protein and its IdeS proteolytic fractions was used to determine the amino acid sequence of EPO-Fc...
December 2, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29181829/long-term-endurance-training-increases-serum-cathepsin-s-levels-in-healthy-female-subjects
#16
M Sponder, C Minichsdorfer, I-A Campean, M Emich, M Fritzer-Szekeres, B Litschauer, J Strametz-Juranek
BACKGROUND: Circulating cathepsin S (CS) has been associated with a lower risk for breast cancer in a large Swedish cohort. Long-term physical activity has been shown to have beneficial effects on the development of various cancer subtypes, in particular breast and colorectal cancers. The aim of this study was to investigate the effect of long-term endurance sport on CS levels in females. MATERIAL AND METHODS: Thirty-six of 40 subjects completed the study. Subjects were told to increase their activity pensum for 8 months reaching 150 min/week moderate or 75 min/week intense exercise...
November 27, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29181259/injury-patterns-in-adolescent-elite-endurance-athletes-participating-in-running-orienteering-and-cross-country-skiing
#17
Philip von Rosen, Frida Floström, Anna Frohm, Annette Heijne
Background: Prospective injury registration studies, monitoring adolescent elite athletes, are sparse in running, orienteering and cross-country skiing, yet essential for developing prevention programs. Purpose: The aims of this study were to describe the injury prevalence/incidence, severity grade, injury location, risk factors and the prevalence of illness in running (RU), orienteering (OR) and cross-country skiing athletes (CR). Study Design: Prospective cohort study...
October 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29173470/effect-of-long-term-aerobic-anaerobic-and-aerobic-anaerobic-physical-training-in-seric-toxic-minerals-concentrations
#18
Marcos Maynar-Mariño, Francisco Llerena, Ignacio Bartolomé, Carmen Crespo, Diego Muñoz, María-Concepción Robles, María-Jesús Caballero
BACKGROUND: Many substances poured out from industries can be toxic to humans and can impair physical performance. Besides, physical training may modify the body concentrations of these substances as a result of physiological adaptations. OBJECTIVES: The aim of the study was to determine if different modalities of exercise might affect serum concentrations of toxic trace elements in sportsmen. METHODS: 80 Spanish national sportsmen were recruited before the start of their training period...
January 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29168967/menstrual-irregularity-and-use-of-oral-contraceptives-in-female-adolescent-athletes-in-swedish-national-sports-high-schools
#19
Philip von Rosen, Annette Heijne, Anna Frohm, Cecilia Fridén
Objective Female adolescent athletes seem to use oral contraceptives (OCs) in the same proportion as the general population. In athletes not using OCs, menstrual irregularity (MI) is reported to be common but there are few studies of MI in adolescent athletes. The aim of the study was to survey menarche, menstrual irregularity and use of OCs in adolescent athletes in the National Sports High Schools in Sweden. A further aim was to study the associations between current sport injury and menstrual irregularity as well as use of OCs...
November 23, 2017: International Journal of Adolescent Medicine and Health
https://www.readbyqxmd.com/read/29165733/impact-of-type-of-sport-gender-and-age-on-red-blood-cell-deformability-of-elite-athletes
#20
Fabian Tomschi, Wilhelm Bloch, Marijke Grau
Our objective was to detect possible differences in red blood cell (RBC) deformability of elite athletes performing different types of sports and being of different age and gender.182 athletes were included in this cross-sectional study. RBC deformability was measured using the laser-assisted optical rotational cell-analyzer. Maximal elongation index (EI max) and shear stress at half-maximum deformation (SS 1/2) were calculated. The ratio SS 1/2 /EI max (EI Ratio) was calculated with low values representing high RBC deformation...
November 17, 2017: International Journal of Sports Medicine
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