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https://www.readbyqxmd.com/read/28644242/effects-of-participation-in-sports-programs-on-walking-ability-and-endurance-over-time-in-children-with-cerebral-palsy
#1
Sandy A Ross, Morgan Yount, Sara Ankarstad, Samantha Bock, Britta Orso, Kimberly Perry, Jennifer Miros, Janice E Brunstrom-Hernandez
OBJECTIVE: Children with cerebral palsy may benefit from maintaining a high level of physical fitness similar to typically developing children especially in terms of long-term physical performance, although in practice this is often difficult. The purpose of this study was to determine the effect of participation in sports programs on walking ability and endurance over time. DESIGN: A retrospective cohort study included participants with cerebral palsy, aged 6 to 20 yrs, who attended a summer sports program from 2004 to 2012...
June 21, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28633035/economy-and-endurance-in-human-evolution
#2
REVIEW
Herman Pontzer
The evolutionary pressures shaping humans' unique bipedal locomotion have been a focus of research since Darwin, but the origins of humans' economical walking gait and endurance running capabilities remain unclear. Here, I review the anatomical and physiological determinants of locomotor economy (e.g., limb length and posture) and endurance (e.g., muscle volume and fiber type) and investigate their development in the hominin fossil record. The earliest hominins were bipedal but retained ape-like features in the hind limb that would have limited their walking economy compared to living humans...
June 19, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28630581/5000-meter-run-performance-is-not-enhanced-24-hrs-after-an-intense-exercise-bout-and-cold-water-immersion
#3
Mary C Stenson, Matthew R Stenson, Tracey D Matthews, Vincent J Paolone
Cold water immersion (CWI) is used by endurance athletes to speed recovery between exercise bouts, but little evidence is available on the effects of CWI on subsequent endurance performance. The purpose of this study was to investigate the effects of CWI following an acute bout of interval training on 5000 m run performance 24 hrs after interval training, perceived muscle soreness (PMS), range of motion (ROM), thigh circumference (TC), and perceived exertion (RPE). Nine endurance-trained males completed 2 trials, each consisting of an interval training session of 8 repetitions of 1200 m at a running pace equal to 75% of VO2peak, either a control or CWI treatment, and a timed 5000 m run 24 hrs post interval training session...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28620483/utilisation-of-supplemented-l-carnitine-for-fuel-efficiency-as-an-antioxidant-and-for-muscle-recovery-in-labrador-retrievers
#4
Jessica L Varney, J W Fowler, W C Gilbert, C N Coon
The primary goal was to investigate the effects of l-carnitine on fuel efficiency, as an antioxidant, and for muscle recovery in Labrador retrievers. Dogs were split into two groups, with one group being supplemented with 250 mg/d of Carniking™ l-carnitine powder. Two experiments (Expt 1 and Expt 2) were performed over a 2-year period which included running programmes, activity monitoring, body composition scans and evaluation of recovery using biomarkers. Each experiment differed slightly in dog number and design: fifty-six v...
2017: Journal of Nutritional Science
https://www.readbyqxmd.com/read/28611674/is-marathon-training-harder-than-the-ironman-training-an-eco-method-comparison
#5
Jonathan Esteve-Lanao, Diego Moreno-Pérez, Claudia A Cardona, Eneko Larumbe-Zabala, Iker Muñoz, Sergio Sellés, Roberto Cejuela
Purpose: To compare the absolute and relative training load of the Marathon (42k) and the Ironman (IM) training in recreational trained athletes. Methods: Fifteen Marathoners and Fifteen Triathletes participated in the study. Their performance level was the same relative to the sex's absolute winner at the race. No differences were presented neither in age, nor in body weight, height, BMI, running VO2max max, or endurance training experience (p > 0.05). They all trained systematically for their respective event (IM or 42k)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28601950/increase-in-carbon-dioxide-accelerates-the-performance-of-endurance-exercise-in-rats
#6
Takeshi Ueha, Keisuke Oe, Masahiko Miwa, Takumi Hasegawa, Akihiro Koh, Hanako Nishimoto, Sang Yang Lee, Takahiro Niikura, Masahiro Kurosaka, Ryosuke Kuroda, Yoshitada Sakai
Endurance exercise generates CO2 via aerobic metabolism; however, its role remains unclear. Exogenous CO2 by transcutaneous delivery promotes muscle fibre-type switching to increase endurance power in skeletal muscles. Here we determined the performance of rats running in activity wheels with/without transcutaneous CO2 exposure to clarify its effect on endurance exercise and recovery from muscle fatigue. Rats were randomised to control, training and CO2 groups. Endurance exercise included activity-wheel running with/without transcutaneous CO2 delivery...
June 10, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28597506/skeletal-myofiber-vegf-is-required-for-the-exercise-training-induced-increase-in-dentate-gyrus-neuronal-precursor-cells
#7
Benjamin Rich, Miriam Scadeng, M Yamaguchi, Peter D Wagner, Ellen C Breen
Exercise signals neurogenesis in the dentate gyrus of the hippocampus. This phenomenon requires vascular endothelial growth factor (VEGF) originating from outside the blood brain barrier, but no cellular source has been identified. Thus, we hypothesized that VEGF produced by skeletal myofibers plays a role in regulating hippocampal neuronal precursor cell proliferation following exercise training. This was tested in adult conditional skeletal myofiber-specific VEGF gene-ablated mice (VEGF(HSA-/-) ) by providing VEGF(HSA-/-) and non-ablated (VEGF(f/f) ) littermates with running wheels for 14 days...
June 9, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28591543/influence-of-polyphenol-rich-diet-on-exercise-induced-immunomodulation-in-male-endurance-athletes
#8
Korbinian Lackermair, Johannes Scherr, Georg Waidhauser, Heiko Methe, Eva Hoster, David C Nieman, Alan Hanley, Sebastian Clauss, Martin Halle, Thomas Nickel
<u>Introduction:</u> Stress is associated with increased susceptibility to infection. We investigated if the mechanism involves immunomodulation of dendritic cells and whether this can be inhibited by a polyphenol-rich diet. <u>Methods:</u> Blood samples were taken from a total of 100 male endurance athletes at five time points around a marathon run: four weeks before, during one week before, and immediately, 24hours and 72hours after. Participants were randomized into two double blinded groups...
June 7, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28587894/burrowing-as-a-novel-voluntary-strength-training-method-for-mice-a-comparison-of-various-voluntary-strength-or-resistance-exercise-methods
#9
P Roemers, P N Mazzola, P P De Deyn, W J Bossers, M J G van Heuvelen, E A van der Zee
BACKGROUND: Voluntary strength training methods for rodents are necessary to investigate the effects of strength training on cognition and the brain. However, few voluntary methods are available. NEW METHOD: The current study tested functional and muscular effects of two novel voluntary strength training methods, burrowing (digging a substrate out of a tube) and unloaded tower climbing, in male C57Bl6 mice. To compare these two novel methods with existing exercise methods, resistance running and (non-resistance) running were included...
June 3, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28585394/wii-based-exercise-program-to-improve-physical-fitness-motor-proficiency-and-functional-mobility-in-adults-with-down-syndrome
#10
V Silva, C Campos, A Sá, M Cavadas, J Pinto, P Simões, S Machado, E Murillo-Rodríguez, N Barbosa-Rocha
BACKGROUND: People with Down syndrome (DS) usually display reduced physical fitness (aerobic capacity, muscle strength and abnormal body composition), motor proficiency impairments (balance and postural control) and physical functional limitations. Exergames can be an appealing alternative to enhance exercise engagement and compliance, whilst improving physical fitness and motor function. This study aims to analyse the effects of a Wii-based exercise program on physical fitness, functional mobility and motor proficiency of adults with DS...
June 6, 2017: Journal of Intellectual Disability Research: JIDR
https://www.readbyqxmd.com/read/28574981/a-motor-unit-based-model-of-muscle-fatigue
#11
Jim R Potvin, Andrew J Fuglevand
Muscle fatigue is a temporary decline in the force and power capacity of skeletal muscle resulting from muscle activity. Because control of muscle is realized at the level of the motor unit (MU), it seems important to consider the physiological properties of motor units when attempting to understand and predict muscle fatigue. Therefore, we developed a phenomenological model of motor unit fatigue as a tractable means to predict muscle fatigue for a variety of tasks and to illustrate the individual contractile responses of MUs whose collective action determines the trajectory of changes in muscle force capacity during prolonged activity...
June 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28570494/endurance-running-training-individually-guided-by-hrv-in-untrained-women
#12
Danilo F da Silva, Zachary M Ferraro, Kristi B Adamo, Fabiana A Machado
The aim of this study was to analyze the effects of HRV-guided training compared to a standardized prescription on i) time to complete 5-km running performance (t5km), ii) peak treadmill running speed (Vpeak) and its time limit (tlim at Vpeak), and iii) autonomic cardiac modulation (i.e., parasympathetic activity and recovery) in untrained women. Additionally, we correlated changes in t5km with changes in Vpeak, tlim at Vpeak and autonomic cardiac modulation. Thirty-six untrained women were divided into a HRV-guided training group (HRVG) and a control group (CG)...
May 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28566251/tenomodulin-is-required-for-tendon-endurance-running-and-collagen-i-fibril-adaptation-to-mechanical-load
#13
Sarah Dex, Paolo Alberton, Lena Willkomm, Thomas Söllradl, Sandra Bago, Stefan Milz, Mehdi Shakibaei, Anita Ignatius, Wilhelm Bloch, Hauke Clausen-Schaumann, Chisa Shukunami, Matthias Schieker, Denitsa Docheva
Tendons are dense connective tissues that attach muscles to bone with an indispensable role in locomotion because of their intrinsic properties of storing and releasing muscle- generated elastic energy. Tenomodulin (Tnmd) is a well-accepted gene marker for the mature tendon/ligament lineage and its loss-of -function in mice leads to a phenotype with distinct signs of premature aging on tissue and stem/progenitor cell levels. Based on these findings, we hypothesized that Tnmd might be an important factor in the functional performance of tendons...
May 5, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28558442/specific-physiological-and-biomechanical-performance-in-elite-sub-elite-and-in-non-elite-male-team-handball-players
#14
Herbert Wagner, Philip X Fuchs, Serge P von Duvillard
BACKGROUND: Team handball is a dynamic sport game that is played professionally in numerous countries. However, knowledge about training and competition is based mostly on practical experience due to limited scientific studies. Consequently, the aims of our study were to compare specific physiological and biomechanical performance in elite, sub-elite and in non-elite male team handball players. METHODS: Thirty-six elite, sub-elite and non-elite male team handball players performed a game based performance test, upper-body and lower-body strength tests, 30m sprint test, counter movement jump test and an incremental treadmill running test...
May 30, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28550178/severity-of-structural-and-functional-right-ventricular-remodeling-depends-on-training-load-in-an-experimental-model-of-endurance-exercise
#15
Maria Sanz-de la Garza, Cira Rubies, Montserrat Batlle, Bart Bijnens, Lluís Mont, Marta Sitges, Eduard Guasch
An arrhythmogenic right ventricle (RV) remodeling has been reported in response to regular training, but it remains unclear how exercise intensity affects the presence and extent of such remodeling. We aimed at assessing the relationship between RV remodeling and exercise load in a long-term endurance training model. Wistar rats were conditioned to run at moderate (MOD, 45 min, 30cm/s) or intense (INT, 60 min, 60cm/s) workloads for 16 weeks; sedentary rats (SED) served as controls. Cardiac remodeling was assessed with standard echocardiographic and tissue Doppler techniques, sensor-tip pressure catheters and pressure-volume loop analyses...
May 26, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28544858/effects-of-resistance-training-on-performance-in-previously-trained-endurance-runners-a-systematic-review
#16
Manuel Alcaraz-Ibañez, Manuel Rodríguez-Pérez
The aim of this work was to identify, synthesize and evaluate the results of randomized controlled trials examining the effects of resistance training on performance indicators in previously trained endurance runners. A database search was carried out in PubMed, Science Direct, OvidSPMedLine, Wiley, Web of Science, ProQuest and Google Scholar. In accordance with the PRISMA checklist, 18 published articles dated prior to May 2016 involving 321 endurance runners were reviewed using the PEDro scale. Resistance training led to general improvements in muscular strength, running economy, muscle power factors, and direct performance in distances between 1,500 and 10,000 m...
May 25, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28543734/the-effect-of-repeated-periods-of-speed-endurance-training-on-performance-running-economy-and-muscle-adaptations-113-120-characters
#17
Casper Skovgaard, Nicki Winfield Almquist, Jens Bangsbo
The effect of repeated intense training interventions was investigated in eight trained male runners (maximum oxygen uptake (VO2 -max): 59.3±3.2 ml·kg(-1) ·min(-1) , mean±SD) who performed ten speed endurance training (SET; repeated 30-s 'all-out' bouts) and ten aerobic moderate-intensity training sessions during two 40-day periods (P1 and P2) separated by ~80 days of habitual training. Before and after both P1 and P2, subjects completed an incremental test to exhaustion to determine VO2 -max and a repeated running test at 90% vVO2 -max to exhaustion (RRT) to determine short-term endurance capacity...
May 19, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28538328/a-systematic-review-of-the-association-between-physical-fitness-and-musculoskeletal-injury-risk-part-1-cardiorespiratory-endurance
#18
Peter J Lisman, Sarah J de la Motte, Timothy C Gribbin, Dianna P Jaffin, Kaitlin Murphy, Patricia A Deuster
Lisman, PJ, de la Motte, SJ, Gribbin, TC, Jaffin, DP, Murphy, K, and Deuster, PA. A systematic review of the association between physical fitness and musculoskeletal injury risk: part 1-cardiorespiratory endurance. J Strength Cond Res 31(6): 1744-1757, 2017-Musculoskeletal injuries (MSK-Is) are a significant health problem for both military and athletic populations. Research indicates that MSK-I is associated with physical fitness; however, the association between specific components of physical fitness and MSK-I in military and athletic populations has not been systematically examined...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538324/physical-fitness-reference-standards-in-french-youth-the-bouge-program
#19
Jérémy Vanhelst, Julien Labreuche, Laurent Béghin, Elodie Drumez, Paul S Fardy, Didier Chapelot, Jacques Mikulovic, Zékya Ulmer
Vanhelst, J, Julien, JL, Beghin, L, Drumez, E, Fardy, PS, Chapelot, D, Mikulovic, J, and Ulmer, Z. Physical fitness reference standards in French youth: The BOUGE program. J Strength Cond Res 31(6): 1709-1718, 2017-The aim of this study was to establish sex- and age-specific physical fitness percentiles in French youth. A sample of 11,186 children and adolescents (5,546 boys and 5,640 girls), aged between 10 and 15 years, was assessed in the French national BOUGE study. Participants were tested for their cardiorespiratory fitness, muscular endurance, speed, flexibility, and agility using the following tests: 20-m shuttle run tests, curl-ups test, 50-m sprint test, back-saver sit and reach test, and 10 × 5-m shuttle run test...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28536531/caffeine-and-bicarbonate-for-speed-a-meta-analysis-of-legal-supplements-potential-for-improving-intense-endurance-exercise-performance
#20
REVIEW
Peter M Christensen, Yusuke Shirai, Christian Ritz, Nikolai B Nordsborg
A 1% change in average speed is enough to affect medal rankings in intense Olympic endurance events lasting ~45 s to 8 min which for example includes 100 m swimming and 400 m running (~1 min), 1,500 m running and 4000 m track cycling (~4 min) and 2,000 m rowing (~6-8 min). To maximize the likelihood of winning, athletes utilizes legal supplements with or without scientifically documented beneficial effects on performance. Therefore, a continued systematic evidence based evaluation of the possible ergogenic effects is of high importance...
2017: Frontiers in Physiology
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