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https://www.readbyqxmd.com/read/28094310/rising-temperatures-may-drive-fishing-induced-selection-of-low-performance-phenotypes
#1
Timothy D Clark, Vanessa Messmer, Andrew J Tobin, Andrew S Hoey, Morgan S Pratchett
Climate warming is likely to interact with other stressors to challenge the physiological capacities and survival of phenotypes within populations. This may be especially true for the billions of fishes per year that undergo vigorous exercise prior to escaping or being intentionally released from fishing gear. Using adult coral grouper (Plectropomus leopardus), an important fisheries species throughout the Indo-Pacific, we show that population-level survival following vigorous exercise is increasingly compromised as temperatures increase from current-day levels (100-67% survival at 24-30 °C) to those projected for the end of the century (42% survival at 33 °C)...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28093924/effects-of-an-adapted-cardiac-rehabilitation-programme-on-arterial-stiffness-in-patients-with-type-2-diabetes-without-cardiac-disease-diagnosis
#2
Anka P Brozic, Susan Marzolini, Jack M Goodman
PURPOSE: To determine the effects of a 12-week cardiac rehabilitation programme of aerobic and resistance exercise training on arterial stiffness, peak calf vasodilatory reserve, and haemostatic markers in patients with type 2 diabetes. METHODS: Observational cohort study examining effects of 12 weeks of exercise training in 23 subjects (13 men, 10 women; mean age of 56.1 ± 10.1 years) with type 2 diabetes mellitus. Subjects performed exercise training for 12 weeks [aerobic training 5 days/week, 70%-75% peak cardiovascular fitness (VO2peak) and resistance training 2-3 days/week, 60% of one repetition maximum]...
January 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28092067/interrelations-among-the-adipocytokines-leptin-and-adiponectin-oxidative-stress-and-aseptic-inflammation-markers-in-pre-and-early-pubertal-normal-weight-and-obese-boys
#3
George Paltoglou, Maria Schoina, George Valsamakis, Nicolaos Salakos, Alexandra Avloniti, Athanasios Chatzinikolaou, Alexandra Margeli, Chrysanthi Skevaki, Maria Papagianni, Christina Kanaka-Gantenbein, Ioannis Papassotiriou, George P Chrousos, Ioannis G Fatouros, George Mastorakos
PURPOSE: Presumed interrelationships among deleterious aspects of adipose tissue metabolism, inflammation, and cellular oxidative stress could be influenced by pubertal hormonal changes. They were investigated in pre- and early pubertal normal-weight and obese boys before and after an exercise bout employed as an energy demanding stimulator. METHODS: Cross-sectional study. Seventy-six healthy pre- (mean ± SD, 10.6 ± 0.2 years old, 28 normal-weight, and 11 obese) and early-(11...
January 16, 2017: Endocrine
https://www.readbyqxmd.com/read/28088898/metabolomic-shifts-following-play-based-activity-in-overweight-preadolescents
#4
Marco Meucci, Carlo Baldari, Laura Guidetti, Jessica Renee Alley, Caorl Cook, Collier Robert Scott
BACKGROUND: Play-based activities can be a positive intervention to increase participation of overweight children. Metabolomics can reveal elemental shifts in the metabolome, lending potential mechanistic explanations behind improvements in physiological systems. OBJECTIVES: To elucidate dose-response urinary metabolomic signature shifts in overweight preadolescents following four or eight weeks of supervised play-based activity versus a typical summer break control group...
January 13, 2017: Current Pediatric Reviews
https://www.readbyqxmd.com/read/28087817/t-cell-redeployment-and-intracellular-cytokine-expression-following-exercise-effects-of-exercise-intensity-and-cytomegalovirus-infection
#5
Emily C LaVoy, Maryam Hussain, Justin Reed, Hawley Kunz, Mira Pistillo, Austin B Bigley, Richard J Simpson
The magnitude of lymphocytosis following exercise is directly related to exercise intensity. Infection with cytomegalovirus (CMV) also augments lymphocytosis after exercise. It is not known if the enhanced T-cell response to exercise due to CMV depends on exercise intensity. Furthermore, exercise-induced changes in T-cell expression of type I and type II cytokines are thought to be intensity dependent, but direct comparisons are lacking. The aim of this experiment was to determine if CMV affects the exercise-induced redistribution of T-cell subsets at varying intensities, and determine the effect of exercise intensity on CD8(+) T-cell cytokine expression...
January 2017: Physiological Reports
https://www.readbyqxmd.com/read/28074493/ampk-does-not-play-a-requisite-role-in-regulation-of-ppargc1a-gene-expression-via-the-alternative-promoter-in-endurance-trained-human-skeletal-muscle
#6
Daniil V Popov, Evgeny A Lysenko, Alexey D Butkov, Tatiana F Vepkhvadze, Dmitriy V Perfilov, Olga L Vinogradova
In human skeletal muscle, PGC-1α is constitutively expressed via the canonical promoter. By contrast, the expression of PGC-1α mRNA via the alternative promoter was found to be highly dependent on the intensity of exercise and to contribute largely to the post-exercise increase of total PGC-1α mRNA. This study investigated the role of AMPK in regulating PGC-1α gene expression via the alternative promoter through a cAMP responsive element-binding protein-1 (CREB1)-dependent mechanism in human skeletal muscle...
January 10, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28070459/pre-versus-post-exercise-protein-intake-has-similar-effects-on-muscular-adaptations
#7
Brad Jon Schoenfeld, Alan Aragon, Colin Wilborn, Stacie L Urbina, Sara E Hayward, James Krieger
The purpose of this study was to test the anabolic window theory by investigating muscle strength, hypertrophy, and body composition changes in response to an equal dose of protein consumed either immediately pre- versus post-resistance training (RT) in trained men. Subjects were 21 resistance-trained men (>1 year RT experience) recruited from a university population. After baseline testing, participants were randomly assigned to 1 of 2 experimental groups: a group that consumed a supplement containing 25 g protein and 1 g carbohydrate immediately prior to exercise (PRE-SUPP) (n = 9) or a group that consumed the same supplement immediately post-exercise (POST-SUPP) (n = 12)...
2017: PeerJ
https://www.readbyqxmd.com/read/28068681/hypoxia-and-hyperoxia-affect-serum-angiogenic-regulators-in-t2dm-men-during-cycling
#8
C Brinkmann, A Metten, P Scriba, C V M Tagarakis, P Wahl, J Latsch, K Brixius, W Bloch
Exercise-induced transient increases in pro-angiogenic regulators can promote angiogenesis.This pilot study aims to analyze the potential of exercise to positively affect angiogenic regulators in patients with type 2 diabetes mellitus (T2DM), who often exhibit abnormal angiogenesis, under different environmental conditions. 9 overweight/obese men with uncomplicated T2DM (8 took anti-diabetic drugs) performed submaximal cycling for 40 min in normoxia (≈21 vol%O2), hypoxia (≈14 vol%O2) and during alternating hypoxia/hyperoxia (≈14 vol%O2/≈30 vol%O2, 5-min intervals) (3×3 crossover design)...
January 9, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28067100/effects-of-a-single-bout-of-strenuous-exercise-on-platelet-activation-in-female-apoe-ldlr-mice
#9
K Przyborowski, H Kassassir, M Wojewoda, K Kmiecik, B Sitek, K Siewiera, A Zakrzewska, A M Rudolf, R Kostogrys, C Watala, J A Zoladz, S Chlopicki
Strenuous physical exercise leads to platelet activation that is normally counterbalanced by the production of endothelium-derived anti-platelet mediators, including prostacyclin (PGI2) and nitric oxide (NO). However, in the case of endothelial dysfunction, e.g. in atherosclerosis, there exists an increased risk for intravascular thrombosis during exercise that might be due to an impairment in endothelial anti-platelet mechanisms. In the present work, we evaluated platelet activation at rest and following a single bout of strenuous treadmill exercise in female ApoE/LDLR(-)(/-) mice with early (3-month-old) and advanced (7-month-old) atherosclerosis compared to female age-matched WT mice...
January 9, 2017: Platelets
https://www.readbyqxmd.com/read/28060927/acute-effects-of-three-neuromuscular-warm-up-strategies-on-several-physical-performance-measures-in-football-players
#10
Francisco Ayala, Ana Calderón-López, Juan Carlos Delgado-Gosálbez, Sergio Parra-Sánchez, Carlos Pomares-Noguera, Sergio Hernández-Sánchez, Alejandro López-Valenciano, Mark De Ste Croix
No studies have analysed the acute effects of the FIFA 11+ and Harmoknee warm-up programmes on major physical performance measures. The aim of this study was to analyse the acute (post-exercise) effects of the FIFA 11+, Harmoknee and dynamic warm-up routines on several physical performance measures in amateur football players. A randomized, crossover and counterbalanced study design was used to address the purpose of this study. A total of sixteen amateur football players completed the following protocols in a randomized order on separate days: a) FIFA 11+; b) Harmoknee; and c) dynamic warm-up (DWU)...
2017: PloS One
https://www.readbyqxmd.com/read/28060035/etiology-and-recovery-of-neuromuscular-fatigue-following-simulated-soccer-match-play
#11
Kevin Thomas, Jack Dent, Glyn Howatson, Stuart Goodall
PURPOSE: We profiled the etiology and recovery of neuromuscular fatigue post-simulated-soccer-match-play. METHODS: Fifteen semi-professional players completed a 90 min simulated soccer match. Pre-, immediately-post and at 24, 48 and 72 h participants completed a battery of neuromuscular, physical and perceptual tests. Perceived fatigue and muscle soreness were assessed via visual analogue scales. Maximum voluntary contraction (MVC) and twitch responses to electrical (femoral nerve) and magnetic (motor cortex) stimulation during isometric knee-extensor contractions and at rest were measured to assess central (voluntary activation, VA) and peripheral (quadriceps potentiated twitch force, Qtw,pot) fatigue, and responses to single and paired-magnetic stimuli were assessed to quantify corticospinal excitability and short-intracortical inhibition (SICI), respectively...
January 3, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28054262/does-photobiomodulation-therapy-is-better-than-cryotherapy-in-muscle-recovery-after-a-high-intensity-exercise-a-randomized-double-blind-placebo-controlled-clinical-trial
#12
Thiago De Marchi, Vinicius Mazzochi Schmitt, Guilherme Pinheiro Machado, Juliane Souza de Sene, Camila Dallavechia de Col, Olga Tairova, Mirian Salvador, Ernesto Cesar Pinto Leal-Junior
This study aimed to determine the effectiveness of photobiomodulation therapy (PBMT) and cryotherapy, in isolated and combined forms, as muscle recovery techniques after muscle fatigue-inducing protocol. Forty volunteers were randomly divided into five groups: a placebo group (PG); a PBMT group (PBMT); a cryotherapy group (CG); a cryotherapy-PBMT group (CPG); and a PBMT-cryotherapy group (PCG). All subjects performed four sessions at 24-h intervals, during which they submitted to isometric assessment (MVC) and blood collection in the pre-exercise period, and 5 and 60 min post-exercise, while the muscle fatigue induction protocol occurred after the pre-exercise collections...
January 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28054256/salivary-alpha-amylase-not-chromogranin-a-reflects-sympathetic-activity-exercise-responses-in-elite-male-wheelchair-athletes-with-or-without-cervical-spinal-cord-injury
#13
Christof A Leicht, Thomas A W Paulson, Victoria L Goosey-Tolfrey, Nicolette C Bishop
BACKGROUND: Salivary alpha amylase (sAA) and chromogranin A (sCgA) have both been suggested as non-invasive markers for sympathetic nervous system (SNS) activity. A complete cervical spinal cord injury leading to tetraplegia is accompanied with sympathetic dysfunction; the aim of this study was to establish the exercise response of these markers in this in vivo model. METHODS: Twenty-six elite male wheelchair athletes (C6-C7 tetraplegia: N = 8, T6-L1 paraplegia: N = 10 and non-spinal cord injured controls: N = 8) performed treadmill exercise to exhaustion...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28054143/a-low-cost-mr-compatible-ergometer-to-assess-post-exercise-phosphocreatine-recovery-kinetics
#14
Niels D Naimon, Jerzy Walczyk, James S Babb, Oleksandr Khegai, Xuejiao Che, Leeor Alon, Ravinder R Regatte, Ryan Brown, Prodromos Parasoglou
OBJECTIVE: To develop a low-cost pedal ergometer compatible with ultrahigh (7 T) field MR systems to reliably quantify metabolic parameters in human lower leg muscle using phosphorus magnetic resonance spectroscopy. MATERIALS AND METHODS: We constructed an MR compatible ergometer using commercially available materials and elastic bands that provide resistance to movement. We recruited ten healthy subjects (eight men and two women, mean age ± standard deviation: 32...
January 4, 2017: Magma
https://www.readbyqxmd.com/read/28051345/how-does-interval-training-prescription-impact-physiological-and-perceptual-responses
#15
Stephen Seiler, Øystein Sylta
The purpose of this study was to compare physiological responses and perceived exertion among well trained cyclists (n=63) performing three different high intensity interval training (HIIT) prescriptions differing in work bout duration and accumulated duration, but all prescribed with maximal session effort. Data are presented as mean(Standard Deviation). Subjects (male, 38(8) y, VO2peak 62(6) mL.kg(-1) min(-1)) completed up to 24 HIIT sessions over 12 weeks as part of a training intervention study. Sessions were prescribed as 4x16 min, 4x8 min, or 4x4 min with 2 min recovery periods (8 sessions of each prescription, balanced over time)...
January 4, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28051341/effects-of-compression-garment-pressure-on-recovery-from-strenuous-exercise
#16
Jessica Hill, Glyn Howatson, Ken van Someren, David Gaze, Hayley Legg, Jack Lineham, Charles Pedlar
Compression garments are frequently used to facilitate recovery from strenuous exercise. Purpose To identify the effects of two different grades of compression garment on recovery indices following strenuous exercise. Methods Forty five recreationally active participants (n=26 males and n=19 females) completed an eccentric exercise protocol consisting of 100 drop jumps. Following the exercise protocol participants were matched for body mass and randomly but equally assigned to either a high (HI) compression pressure group, a low (LOW) compression pressure group, or a sham ultrasound group (SHAM)...
January 4, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28045559/acute-blood-pressure-response-in-hypertensive-elderly-women-immediately-after-water-aerobics-exercise-a-crossover-study
#17
Raphael Martins Cunha, José Vilaça-Alves, Marcelo Vasconcelos Noleto, Juliana Sá Silva, Andressa Moura Costa, Christoffer Novais Farias Silva, Thaís Inácio Rolim Póvoa, Alexandre Machado Lehnen
Water aerobics exercise is widely recommended for elderly people. However, little is known about the acute effects on hemodynamic variables. Thus, we assessed the effects of a water aerobic session on blood pressure in hypertensive elderly women. Fifty hypertensive elderly women aged 67.8 ± 4.1 years, 1.5 ± 0.6 m high and BMI 28.6 ± 3.9 kg/m(2), participated in a crossover clinical trial. The experiment consisted of a 45-minute water aerobics session (70%-75% HRmax adjusted for the aquatic environment) (ES) and a control session (no exercise for 45 minutes) (CS)...
January 3, 2017: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/28044282/are-prepubertal-children-metabolically-comparable-to-well-trained-adult-endurance-athletes
#18
REVIEW
Sébastien Ratel, Anthony J Blazevich
It is well acknowledged that prepubertal children have smaller body dimensions and a poorer mechanical (movement) efficiency, and thus a lower work capacity than adults. However, the scientific evidence indicates that prepubertal children have a greater net contribution of energy derived from aerobic metabolism in exercising muscle and reduced susceptibility to muscular fatigue, which makes them metabolically comparable to well-trained adult endurance athletes. For example, the relative energy contribution from oxidative and non-oxidative (i...
January 2, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28043028/modulation-of-inflammatory-response-arising-from-high-intensity-intermittent-and-concurrent-strength-training-in-physically-active-males
#19
Paula Alves Monteiro, Eduardo Zapaterra Campos, Flaviane Poleto de Oliveira, Fernando Pierin Peres, José Cesar Rosa-Neto, Gustavo Duarte Pimentel, Fabio Santos Lira
The purposes of this study were to determine: (i) the extent of an acute session of high-intensity intermittent exercise (HIIE) followed by a concurrent strength session (Conc) on the increase of systemic inflammatory cytokines and chemokines, and (ii) whether eight weeks of high intensity interval training plus concurrent strength training alters the acute inflammatory response and immune status. Ten recreationally active males (aged 26.9±4.3years) performed two experimental exercise sessions interspersed by eight weeks of HIIT plus concurrent strength training...
December 30, 2016: Cytokine
https://www.readbyqxmd.com/read/28032459/effects-of-weekly-supervised-exercise-or-physical-activity-counseling-on-fasting-blood-glucose-in-women-diagnosed-with-gestational-diabetes-mellitus-a-systematic-review-and-meta-analysis-of-randomized-trials
#20
Roberta Bgeginski, Paula A B Ribeiro, Michelle F Mottola, José Geraldo L Ramos
BACKGROUND: Exercise is an important part of gestational diabetes mellitus (GDM) lifestyle management. However, there is no meta-analysis analyzing the effects of exercise programs on fasting blood glucose (FBG) in women with GDM. A systematic review with meta-analysis was performed to evaluate the effect of weekly-supervised exercise (EXE group) or physical activity counseling (PA group) in women with GDM compared to usual prenatal (UPN group) on glycemic control. METHODS: Eligible trials were identified from MEDLINE, EMBASE, Web of Science, Scopus and SportDiscus up to 11 December 2016...
December 29, 2016: Journal of Diabetes
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