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https://www.readbyqxmd.com/read/28479388/acceleration-based-training-a-new-mode-of-training-in-senescent-rats-improving-performance-and-left-ventricular-and-muscle-functions
#1
Thierry Launay, Iman Momken, Serge Carreira, Nathalie Mougenot, Xian-Long Zhou, Leanne De Koning, Romain Niel, Bruno Riou, Véronique Billat, Sophie Besse
High intensity training (HIT) has been shown to improve maximal aerobic capacity and muscle protein synthesis but has not yet been investigated in senescent rats. We hypothesized that the change of speed (acceleration) during each bout of HIT acts as a stimulus responsible for the adaptations of the organism to exercise. Twenty two month-old (mo) rats (n=14) were subjected to a short acceleration protocol (20-30min) of exercise, comprising 3 independent bouts of acceleration and compared to an age-matched sedentary group (n=14)...
May 4, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28471380/a-genetic-population-isolate-in-the-netherlands-showing-extensive-haplotype-sharing-and-long-regions-of-homozygosity
#2
Metten Somers, Loes M Olde Loohuis, Maartje F Aukes, Bogdan Pasaniuc, Kees C L de Visser, René S Kahn, Iris E Sommer, Roel A Ophoff
Genetic isolated populations have features that may facilitate genetic analyses and can be leveraged to improve power of mapping genes to complex traits. Our aim was to test the extent to which a population with a former history of geographic isolation and religious endogamy, and currently with one of the highest fertility rates in The Netherlands, shows signs of genetic isolation. For this purpose, genome-wide genotype data was collected of 72 unrelated individuals from this population as well as in a sample of 104 random control subjects from The Netherlands...
May 4, 2017: Genes
https://www.readbyqxmd.com/read/28465660/the-effect-of-body-mass-on-the-shoe-athlete-interaction
#3
A Tsouknidas, M Pantazopoulos, D Sagris, D Fasnakis, S Maropoulos, F Arabatzi, N Michailidis
Long-distance running is known to induce joint overloading and elevate cytokine levels, which are the hallmarks for a variety of running-related injuries. To address this, footwear systems incorporate cushioning midsoles to mitigate injurious mechanical loading. The aim of this study was to evaluate the effect of athlete body mass on the cushioning capacity of technical footwear. An artificial heel was prototyped to fit the impact pattern of a heel-strike runner and used to measure shock attenuation by an automated drop test...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28459360/strength-training-for-middle-and-long-distance-performance-a-meta-analysis
#4
Nicolas Berryman, Inigo Mujika, Denis Arvisais, Marie Roubeix, Carl Binet, Laurent Bosquet
PURPOSE: The objective of this study was to assess the net effects of strength training on middle- and long-distance performance through a meta-analysis of the available literature. METHODS: Three databases were searched from which 28 out of 554 potential studies met all inclusion criteria. Standardized mean differences (SMDs) were calculated and weighted by the inverse of variance to calculate an overall effect and its 95% confidence interval (CI). Subgroup analyses were conducted to determine whether the strength-training intensity, duration and frequency, and population performance level, age, sex and sport were outcomes that may influence the magnitude of the effect...
May 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28459350/positive-effects-of-augmented-feedback-to-reduce-time-on-ground-in-well-trained-runners
#5
Rahel Gilgen-Ammann, Thomas Wyss, Severin Troesch, Louis Heyer, Wolfgang Taube
PURPOSE: Successful elite sprint to long-distance runners are known to have shorter ground contact times (GCT) than their less successful counterparts. The purpose of this study was to investigate whether augmented feedback (aF) about GCT can reduce the time on ground (TOG) per minute in long-distance runners and if so, whether this reduction improves running performance. METHODS: Thirty well-trained runners were allocated to three groups. The intervention group (IG) received visual aF about their GCT during eight high-intensity interval sessions in the 4-week training period and were instructed to minimize GCT...
May 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28419794/-healthy-workplaces-a-goal-or-a-long-distance-run
#6
EDITORIAL
Dolores Solé Gómez
No abstract text is available yet for this article.
April 2017: Archivos de Prevención de Riesgos Laborales
https://www.readbyqxmd.com/read/28371585/validity-of-field-assessments-to-predict-peak-muscle-power-in-preschoolers
#7
Sara King-Dowling, Nicole A Proudfoot, John Cairney, Brian W Timmons
BACKGROUND: Field-based fitness assessments are time- and cost-efficient. However, no studies to date have reported the predictive value of field-based musculoskeletal fitness assessments in preschoolers. The purpose of this study was to determine the validity of two field assessments to predict peak muscle power in preschool-aged children. METHODS: Four-hundred nineteen 3- to 5-year olds participated (208 girls, 211 boys; mean age: 4.5±0.9 years). Peak power (PP) was evaluated using a modified 10-second Wingate protocol as the criterion standard...
April 3, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28350714/multiple-transportable-carbohydrate-impact-on-long-distance-triathlon-performance
#8
David S Rowlands, Stuart D Houltham
The ingestion of multiple (2:1 glucose:fructose) transportable carbohydrate in beverages at high rates (>78 g·h) during endurance exercise enhances exogenous carbohydrate oxidation, fluid absorption, gut comfort, and performance, relative to glucose alone. But during long-distance endurance competition, athletes prefer a solid-gel-drink format, and the effect size of multiple-transportable carbohydrate is unknown. PURPOSE: To determine the effect of multiple-transportable carbohydrate on triathlon competition performance when ingested within bars, gels, and drinks...
March 27, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28348919/optimized-multiresidue-analysis-of-organic-contaminants-of-priority-concern-in-a-daily-consumed-fish-grass-carp
#9
Wei He, Yanru Chen, Chen Yang, Wenxiu Liu, Xiangzhen Kong, Ning Qin, Qishuang He, Fuliu Xu
The organic contaminants, including polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), and polychlorinated biphenyls (PCBs), are of priority concern because of their persistence, toxicity, and long-distance transportation in global environment. Their residues in a daily consumed fish (grass carp) pose potential threat to human health and aquatic ecosystems. The present study optimized an analytical protocol of microwave-assisted extraction (MAE), lip-removal by gel permeation chromatography (GPC), cleanup by solid phase cartridge (SC) or adsorption chromatography column (CC), and gas chromatography-mass spectrometry (GC/MS)...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28338366/effects-of-bout-duration-on-players-internal-and-external-loads-during-small-sided-games-in-young-soccer-players
#10
Yusuf Köklü, Utku Alemdaroğlu, Hamit Cihan, Del P Wong
PURPOSE: This study investigated the effects of different bout durations on internal and external loads of young soccer players during different small-sided games (SSGs). METHOD: Fifteen male young soccer players (average age 17 ± 1 years) participated in 2 vs 2, 3 vs 3 and 4 vs 4 SSGs. All games lasted 12 min playing time in total, but each SSG format further consisted of four bout durations: continuous (CON: 1 bout x 12 min) or interval with short (SBD: 6 bouts x 2 min), medium (MBD: 3 bouts x 4 min) or long (LBD: 2 bouts x 6 min) bout durations...
March 24, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28273177/acute-exhaustive-aerobic-exercise-training-impair-cardiomyocyte-function-and-calcium-handling-in-sprague-dawley-rats
#11
Kristine Ljones, Henning Ofstad Ness, Karin Solvang-Garten, Svein Erik Gaustad, Morten Andre Høydal
INTRODUCTION: Recent data from long-distance endurance participants suggest that cardiac function is impaired after completion. Existing data further indicate that right ventricular function is more affected than left ventricular function. The cellular mechanisms underpinning cardiac deterioration are limited and therefore the aim of this study was to examine cardiomyocyte and molecular responses of the right and left ventricle to an acute bout of exhaustive endurance exercise. MATERIALS AND METHODS: Male Sprague-Dawley rats were assigned to sedentary controls or acute exhaustive endurance exercise consisting of a 120 minutes long forced treadmill run...
2017: PloS One
https://www.readbyqxmd.com/read/28257352/cardiovascular-risks-in-long-distance-runners
#12
Bethany Rolfe Witham, Keven Babbitt
Distance running has become increasingly popular since the 1970s. Despite the health benefits, long-distance running has been associated with an increased risk for cardiac events. Healthcare professionals should be familiar with distance running cardiac risk factors and preparticipation screening recommendations from the American Heart Association, and should screen and educate patients during healthcare encounters. Nurses are particularly well suited to educate runners on risks and symptoms of cardiac dysfunction...
April 2017: Journal of Christian Nursing: a Quarterly Publication of Nurses Christian Fellowship
https://www.readbyqxmd.com/read/28253025/long-sprint-abilities-in-soccer-ball-vs-running-drills
#13
Carlo Castagna, Lorenzo Francini, Susana Cristina Araújo Póvoas, Stefano D'Ottavio
PURPOSE: To examine the acute effects of generic (Running Drills, RD) and specific (Small-Sided Games, SSG) Long Sprint Ability (LSA) drills on internal and external load of male soccer-players. METHODS: Fourteen academy-level soccer-players (mean±SD; age 17.6±0.61 years, height 1.81±0.63 m, body-mass 69.53±4.65 kg) performed four 30s LSA bouts for maintenance (work:rest, 1:2) and production (1:5) with RD and SSG drills. Players' external-load was tracked with GPS technology (20Hz) and heart-rate (HR), blood-lactate concentrations (BLc) and rate of perceived exertion (RPE) were used to characterize players' internal-load...
March 2, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28243533/gait-changes-in-a-line-of-mice-artificially-selected-for-longer-limbs
#14
Leah M Sparrow, Emily Pellatt, Sabrina S Yu, David A Raichlen, Herman Pontzer, Campbell Rolian
In legged terrestrial locomotion, the duration of stance phase, i.e., when limbs are in contact with the substrate, is positively correlated with limb length, and negatively correlated with the metabolic cost of transport. These relationships are well documented at the interspecific level, across a broad range of body sizes and travel speeds. However, such relationships are harder to evaluate within species (i.e., where natural selection operates), largely for practical reasons, including low population variance in limb length, and the presence of confounding factors such as body mass, or training...
2017: PeerJ
https://www.readbyqxmd.com/read/28236094/-diseases-and-overuse-injuries-of-the-lower-extremities-in-long-distance-runners
#15
REVIEW
M Tschopp, F Brunner
Running is one of the most popular sports worldwide, with running events attracting hundreds of thousands of runners of all age groups. Running is an effective way to improve health but is also associated with a high risk of injuries. Up to 50% of regular runners report having more than one injury each year. Some injuries are caused by an accident but most are caused by overuse. The most frequent diagnoses are patellofemoral pain syndrome, tibial stress syndrome (shin splint), Achilles tendinopathy, iliotibial band friction syndrome (runner's knee), plantar fasciitis and stress fractures of the metatarsals and tibia...
February 24, 2017: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/28229568/yo-yo-ir1-vs-incremental-continuous-running-test-for-prediction-of-3000-m-performance
#16
Boris Schmitz, Andreas Klose, Katrin Schelleckes, Charlotte M Jekat, Michael Krüger, Stefan-Martin Brand
BACKGROUND: This study aimed to compare physiological responses during the Yo-Yo intermittent recovery level 1 (Yo-Yo IR1) test and an incremental continuous running field test (ICRT) and to analyze their predictive value on 3000 m running performance. METHODS: Forty moderately trained individuals (18 females) performed the ICRT and Yo-Yo IR1 test to exhaustion. The ICRT was performed as graded running test with an increase of 2.0 km·h-1 after each 3 min interval for lactate diagnostic...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28210643/perception-of-health-problems-among-competitive-runners-a-qualitative-study-of-cognitive-appraisals-and-behavioral-responses
#17
Sara Jelvegård, Toomas Timpka, Victor Bargoria, Håkan Gauffin, Jenny Jacobsson
BACKGROUND: Approximately 2 of every 3 competitive runners sustain at least 1 health problem each season. Most of these problems are nontraumatic injuries with gradual onset. The main known risk indicator for sustaining a new running-related injury episode is a history of a previous injury, suggesting that behavioral habits are part of the causal mechanisms. PURPOSE: Identification of elements associated with purposeful interpretations of body perceptions and balanced behavioral responses may supply vital information for prevention of health problems in runners...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28207880/skeletal-muscle-metabolic-adaptations-to-endurance-exercise-training-are-attainable-in-mice-with-simvastatin-treatment
#18
William M Southern, Anna S Nichenko, Daniel D Shill, Corey C Spencer, Nathan T Jenkins, Kevin K McCully, Jarrod A Call
We tested the hypothesis that a 6-week regimen of simvastatin would attenuate skeletal muscle adaptation to low-intensity exercise. Male C57BL/6J wildtype mice were subjected to 6-weeks of voluntary wheel running or normal cage activities with or without simvastatin treatment (20 mg/kg/d, n = 7-8 per group). Adaptations in in vivo fatigue resistance were determined by a treadmill running test, and by ankle plantarflexor contractile assessment. The tibialis anterior, gastrocnemius, and plantaris muscles were evaluated for exercised-induced mitochondrial adaptations (i...
2017: PloS One
https://www.readbyqxmd.com/read/28195301/people-choose-to-run-at-their-optimal-speed
#19
Joseph K Rathkey, Cara M Wall-Scheffler
OBJECTIVES: The purpose of this article is to test whether people choose to behave in a manner that reduces the amount of energy they use to travel a given distance. While this has been shown consistently for walking, it has never been tested with human running. MATERIALS AND METHODS: We collected energetic data and lower limb anthropometrics on nine men running at six different running speeds. We collected on all six speeds on 3 different days and took the average of the energetic values for each speed...
May 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28167230/adaptation-to-a-blood-pressure-telemetry-system-revealed-by-measures-of-activity-agility-and-operant-learning-in-mice
#20
Anfisa Popova, Darya Tsvirkun, Oleg Dolgov, Konstantin Anokhin, Jeffrey Alberts, Evgeniia Lagereva, Marc-Antoine Custaud, Guillemette Gauquelin-Koch, Olga Vinogradova, Alexander Andreev-Andrievskiy
INTRODUCTION: Implantable telemetry enables continuous monitoring of physiological functions in freely moving animals and can greatly complement pharmacological research. Despite its miniaturization, a sensor/transmitter constitutes 5% or more of a mouse's bodyweight. The aim of the present study was to evaluate whether factors related to the presence of a probe/transmitter influence the ambulatory activity, strength, agility, or operant, motivated behaviors of this small rodent. METHODS: Adult male mice (C57BL/6N, 22-25g, 9-10weeks; implanted n=26, intact n=45) were evaluated during week-long tests, conducted three and eight weeks after surgical implantation of the PA-C10 blood pressure probe...
February 3, 2017: Journal of Pharmacological and Toxicological Methods
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