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https://www.readbyqxmd.com/read/29167117/effect-of-6-weeks-of-high-intensity-one-legged-cycling-on-functional-sympatholysis-and-atp-signaling-in-patients-with-heart-failure
#1
Gregers Wibe Munch, Ulrik Winning Iepsen, Camilla Koch Ryrsø, Jaya Birgitte Rosenmeier, Bente Klarlund Pedersen, Stefan P Mortensen
Breathlessness during daily activities is the primary symptom in patients with heart failure (HF). Poor correlation between the hemodynamic parameters of left ventricular performance and perceived symptoms suggests that other factors such as skeletal muscle function plays a role in determining exercise capacity. We investigated the effect of six weeks of high-intensity one-legged cycling (HIC; 8x4 at 90% one-legged cycling max) on: 1) the ability to override sympathetic vasoconstriction (arterial infusion of tyramine) during one-legged knee-extensor exercise (KEE); 2) vascular function (arterial infusion of ACh, SNP, tyramine and ATP); 3) exercise capacity in HF patients with reduced ejection fraction (n=8) compared with healthy individuals (n=6)...
November 22, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29166903/evaluation-of-microrna-expression-in-plasma-and-skeletal-muscle-of-thoroughbred-racehorses-in-training
#2
B A McGivney, M E Griffin, K F Gough, C L McGivney, J A Browne, E W Hill, L M Katz
BACKGROUND: Circulating miRNAs (ci-miRNAs) are endogenous, non-coding RNAs emerging as potential diagnostic biomarkers. Equine miRNAs have been previously identified including subsets of tissue-specific miRNAs. In order to investigate ci-miRNAs as diagnostic tools, normal patterns of expression for different scenarios including responses to exercise need to be identified. Human studies have demonstrated that many ci-miRNAs are up-regulated following exercise with changes in expression patterns in skeletal muscle...
November 22, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29166321/adipose-lipolysis-unchanged-by-preexercise-carbohydrate-regardless-of-glycemic-index
#3
Daniel A Baur, Brandon D Willingham, Kyle A Smith, Jacob N Kisiolek, Margaret C Morrissey, Patrick G Saracino, Tristan J Ragland, Michael J Ormsbee
PURPOSE: To determine the impact of pre-exercise carbohydrate of different glycemic indices on subcutaneous abdominal adipose tissue (SCAAT) metabolism and running performance. METHODS: Ten trained male runners completed three experimental trials consisting of 30 min at 60% VO2max, 30 min at 75% VO2max, and a 5-km time trial (TT). Thirty min prior to exercise, participants consumed one of three beverages: 1) 75 g low glycemic index modified starch supplement (UCAN), 2) 75 g high glycemic index glucose-based supplement (G), or 3) a flavor-matched non-caloric placebo (PL)...
November 20, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29166252/low-intensity-exercise-accelerates-wound-healing-in-diabetic-mice
#4
Todd Keylock, Lee Meserve, Amber Wolfe
INTRODUCTION: Moderate-intensity aerobic exercise has been noted to improve wound healing rates in mice and people, but different intensities of exercise may have different impacts on healing rates. It is important to determine the most beneficial exercise intensity for improving wound healing in people with type 2 diabetes to help prevent wounds from becoming chronic, greatly reduce pain and immobility, and lower the high cost of health care associated with treatment. OBJECTIVE: The purpose of this study is to determine the impact of low-intensity exercise compared with high-intensity exercise in terms of the rate of wound healing in diabetic mice...
November 20, 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/29165732/effect-of-melatonin-supplementation-on-antioxidant-status-and-dna-damage-in-high-intensity-trained-athletes
#5
Manuel Ortiz-Franco, Elena Planells, Bartholomé Quintero, Dario Acuña-Castroviejo, Iryna Rusanova, Germaine Escames, Jorge Molina-López
The aim of the study was to evaluate the effect of melatonin supplementation on antioxidant capacity and DNA damage in high intensity interval training (HIIT) athletes. A 2-week randomised, double-blinded, placebo-controlled trial with two groups was conducted. Placebo (PG) and melatonin (MG) (20 mg/d) athletes were monitored over a two-week period of HIIT and strength training. The total antioxidant capacity (TAC) and the glutathione peroxidase (GPx) and superoxide dismutase (SOD) activities were analysed in blood samples...
November 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29165142/the-effect-of-exercise-intensity-on-brain-derived-neurotrophic-factor-and-memory-in-adolescents
#6
Yong Kyun Jeon, Chang Ho Ha
BACKGROUND: Brain derived neurotrophic factor (BDNF) seems to serve as an important regulatory mechanism in the growth and development of neurons in many areas of the brain.Insulin-like growth factor 1 (IGF-1) is related to neurogenesis and regulation of the BDNF gene and is involved in the growth and differentiation of neurons.Cortisol is released in response to stimuli such as psychological oppression, anxiety, and fear. Stress also induces changes in BDNF. The purpose of this study was thus to examine the effects of varying intensities of aerobic exercise on resting serum BDNF, IGF-1 concentrations, cortisol, and memory of adolescents...
April 4, 2017: Environmental Health and Preventive Medicine
https://www.readbyqxmd.com/read/29164363/can-we-hiit-cancer-if-we-attack-inflammation
#7
Efthymios Papadopoulos, Daniel Santa Mina
Physical exercise offers numerous health-related benefits to individuals with cancer. Epidemiologic research has primarily been concerned with conventional exercise training that aligns with the recommendations of 150 min of moderate to vigorous physical activity per week. These recommendations are safe and effective at improving physical and psychosocial outcomes. Given the extensive evidence for generalized physical activity, researchers have begun to explore novel training regimens that may provide additional health benefits and/or improved adherence...
November 21, 2017: Cancer Causes & Control: CCC
https://www.readbyqxmd.com/read/29163201/short-term-high-and-moderate-intensity-training-modifies-inflammatory-and-metabolic-factors-in-response-to-acute-exercise
#8
Fabio Santos Lira, Thaislaine Dos Santos, Renan Santos Caldeira, Daniela S Inoue, Valéria L G Panissa, Carolina Cabral-Santos, Eduardo Z Campos, Bruno Rodrigues, Paula A Monteiro
Purpose: To compare the acute and chronic effects of high intensity intermittent training (HIIT) and steady state training (SST) on the metabolic profile and inflammatory response in physically active men. Methods: Thirty recreationally active men were randomly allocated to a control group (n = 10), HIIT group (n = 10), or SST group (n = 10). For 5 weeks, three times per week, subjects performed HIIT (5 km 1-min at 100% of maximal aerobic speed interspersed by 1-min passive recovery) or SST (5 km at 70% of maximal aerobic speed) while the control group did not perform training...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29163192/cycling-before-and-after-exhaustion-differently-affects-cardiac-autonomic-control-during-heart-rate-matched-exercise
#9
Matthias Weippert, Martin Behrens, Anett Mau-Moeller, Sven Bruhn, Kristin Behrens
During cycling before (PRE) and after exhaustion (POST) different modes of autonomic cardiac control might occur due to different interoceptive input and altered influences from higher brain centers. We hypothesized that heart rate variability (HRV) is significantly affected by an interaction of the experimental period (PRE vs. POST) and exercise intensity (HIGH vs. LOW; HIGH = HR > HR at the lactate threshold (HRLT), LOW = HR ≤ HRLT) despite identical average HR. Methods: Fifty healthy volunteers completed an incremental cycling test until exhaustion...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29161767/effects-of-different-endurance-exercise-modalities-on-migraine-days-and-cerebrovascular-health-in-episodic-migraineurs-a-randomized-controlled-trial
#10
Henner Hanssen, Alice Minghetti, Stefano Magon, Anja Rossmeissl, Maria Rasenack, Athina Papadopoulou, Christopher Klenk, Oliver Faude, Lukas Zahner, Till Sprenger, Lars Donath
BACKGROUND: Aerobic exercise training is a promising complementary treatment option in migraine and can reduce migraine days and improve retinal microvascular function. Our aim was to elucidate whether different aerobic exercise programs at high vs. moderate intensities distinctly affect migraine days as primary outcome and retinal vessel parameters as a secondary. METHODS: In this randomized controlled trial, migraine days were recorded by a validated migraine diary in 45 migraineurs of which 36 (female: 28; age: 36 (SD:10)/ BMI: 23...
November 21, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29161419/incidence-of-postoperative-atrial-fibrillation-recurrence-in-patients-discharged-in-sinus-rhythm-after-cardiac-surgery-a-systematic-review-and-meta-analysis
#11
Nicole Lowres, Georgina Mulcahy, Kai Jin, Robyn Gallagher, Lis Neubeck, Ben Freedman
Postoperative atrial fibrillation (POAF) is associated with increased stroke risk and mortality post-discharge. POAF is often considered transient; however, recurrence is likely under-recognized as symptoms are an unreliable guide. Surveillance post-discharge may identify asymptomatic POAF recurrences in patients discharged in sinus rhythm. Therefore, we performed a systematic review and meta-analysis of studies investigating POAF recurrence post-discharge, in patients with new-onset POAF following cardiac surgery who reverted to sinus rhythm prior to discharge...
November 17, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29161316/acute-exercise-alters-skeletal-muscle-mitochondrial-respiration-and-h2o2-emission-in-response-to-hyperinsulinemic-euglycemic-clamp-in-middle-aged-obese-men
#12
Adam J Trewin, Itamar Levinger, Lewan Parker, Christopher S Shaw, Fabio R Serpiello, Mitchell J Anderson, Glenn K McConell, David L Hare, Nigel K Stepto
Obesity, sedentary lifestyle and aging are associated with mitochondrial dysfunction and impaired insulin sensitivity. Acute exercise increases insulin sensitivity in skeletal muscle; however, whether mitochondria are involved in these processes remains unclear. The aim of this study was to investigate the effects of insulin stimulation at rest and after acute exercise on skeletal muscle mitochondrial respiratory function (JO2) and hydrogen peroxide emission (JH2O2), and the associations with insulin sensitivity in obese, sedentary men...
2017: PloS One
https://www.readbyqxmd.com/read/29159914/gaba-concentration-in-sensorimotor-cortex-following-high-intensity-exercise-and-relationship-to-lactate-levels
#13
James P Coxon, Robin F H Cash, Joshua J Hendrikse, Nigel C Rogasch, Ellen Stavrinos, Chao Suo, Murat Yücel
High-intensity exercise increases the concentration of circulating lactate. Cortical uptake of blood borne lactate increases during and following exercise, however the potential relationship with changes in the concentration of neurometabolites remains unclear. While changes in neurometabolite concentration have previously been demonstrated in primary visual cortex following exercise, it remains unknown whether these changes extend to regions such as sensorimotor cortex (SM) or executive regions such as dorsolateral prefrontal cortex (DLPFC)...
November 21, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29159538/neuroinflammation-cortical-activity-and-fatiguing-behaviour-during-self-paced-exercise
#14
Nicole Vargas, Frank Marino
The present study aimed to identify whether or not the release of interleukin (IL)-6 and soluble (s) IL-6 receptor (R) is associated with fatiguing behaviour and changes in cortical activity during self-paced exercise. Relationships between the IL-6 and its soluble receptors, total work, reductions in power output, and changes in slow, alpha (α) and fast, beta (β) brain waves during self-paced exercise were evaluated. Different intensities and environments were used to manipulate the release of IL-6, whereby seven active males cycled for 60 min in heat stress (HS) or thermoneutral (TN) environments at a clamped rating of perceived exertion (RPE) equating to low intensity (RPE = 12) or high intensity (RPE = 16)...
November 20, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/29158619/the-effect-of-mineral-based-alkaline-water-on-hydration-status-and-the-metabolic-response-to-short-term-anaerobic-exercise
#15
Jakub Chycki, Tomasz Zając, Adam Maszczyk, Anna Kurylas
Previously it was demonstrated that mineralization and alkalization properties of mineral water are important factors influencing acid-base balance and hydration in athletes. The purpose of this study was to investigate the effects of drinking different types of water on urine pH, specific urine gravity, and post-exercise lactate utilization in response to strenuous exercise. Thirty-six male soccer players were divided into three intervention groups, consuming around 4.0 l/day of different types of water for 7 days: HM (n=12; highly mineralized water), LM (n=12; low mineralized water), and CON (n=12; table water)...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29157338/one-year-mission-on-iss-is-a-step-towards-interplanetary-missions
#16
Elena V Fomina, Nataliya Yu Lysova, Tatyana B Kukoba, Alexey P Grishin, Mikhail B Kornienko
BACKGROUND: in the 1990s Russian cosmonauts performed six long-duration missions on Mir that went from 312 to 438 d. In 2015 a mission on the International Space Station that continued for 340 d, 8 h, and 47 min was successfully accomplished. It was a joint U.S./Russian mission completed by Scott Kelly and Mikhail Kornienko (KM). METHODS: The intensity of in-flight physical exercises and postflight motor changes were measured in KM and in the six cosmonauts who made shorter flights (173...
December 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/29156929/-role-of-the-egg-in-the-diet-of-athletes-and-physically-active-people
#17
Ana M López Sobaler, Aránzazu Aparicio Vizuete, Rosa M Ortega
The practice of sport and medium-high intensity exercise increases the needs of energy and nutrients. Proper nutrition is very important for reaching the maximum performance, reducing the risk of injury, and ensuring the best recovery. It must also ensure the achievement of optimum nutritional status and prevent health problems at the present and in the future time. Eggs are a very nutritious food that can help athletes to achieve a correct diet. It contains proteins of high quality and bioavailability, a profile of fatty acids very favorable from the cardiovascular point of view, and vitamins and minerals involved in energy and protein metabolism, in defense against oxidative stress and inflammation, in cell growth and tissue repair...
October 15, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29155225/a-systematic-review-of-the-long-term-effectiveness-of-work-based-lifestyle-interventions-to-tackle-overweight-and-obesity
#18
REVIEW
Greta Tam, May P S Yeung
Obesity is one of the five leading global risks for mortality, accounting for 5% of deaths worldwide. Workplace health promotion programs have the potential to deliver population-level interventions combining physical activity and exercise. However, there is no recent critical review of trials on long-term effectiveness of multicomponent lifestyle interventions in the workplace targeting obesity. Good quality evidence is needed to develop optimal strategies to tackle adult obesity. 1035 studies were retrieved by literature search in MEDLINE, Embase, PSYCH INFO and Cochrane library from 2005 to September 2016...
November 16, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/29152797/oxidative-stress-does-not-influence-local-sweat-rate-during-high-intensity-exercise
#19
Robert D Meade, Naoto Fujii, Martin P Poirier, Pierre Boulay, Ronald J Sigal, Glen P Kenny
Nitric oxide (NO)-dependent sweating is diminished during high but not moderate intensity exercise. We evaluated whether this impairment stems from increased oxidative stress during high intensity exercise. On two separate days, 11 young (24 ± 4 years) males cycled in the heat (35°C) at a moderate (500 W; 52 ± 6%VO2peak ) or high (700 W; 71 ± 5%VO2peak ) rate of metabolic heat production. Each session included two 30-min exercise bouts separated by a 20-min recovery. Local sweat rate was monitored at four forearm skin sites continuously perfused via intradermal microdialysis with: (1) lactated Ringer's solution (Control), (2) 10 mm ascorbate (Ascorbate; non-selective antioxidant), (3) 10 mm N(G) -nitro-L -arginine methyl ester (L-NAME; NO synthase inhibitor), or (4) 10 mm Ascorbate + 10 mm L-NAME (Ascorbate + L-NAME)...
November 19, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29151442/effects-of-short-lasting-supramaximal-intensity-exercise-on-diet-induced-increase-in-oxygen-uptake
#20
Katsunori Tsuji, Yuzhong Xu, Xin Liu, Izumi Tabata
This study was undertaken to quantify the additional increase in diet-induced oxygen uptake after exhaustive high-intensity intermittent exercise (HIIE), consisting of 6-7 bouts of 20-sec bicycle exercise (intensity: 170% V˙O2max) with a 10-sec rest between bouts. Using a metabolic chamber, the oxygen uptake of ten men was measured from 10:30 am to 07:00 am the next day on two separate days with or without HIIE, with lunch (12:00) and supper (18:00) (Diet experiment). On two other days, the oxygen uptake of six different subjects was measured from 10:30 to 16:00 with or without HIIE, but without meals (Fasting experiment)...
November 2017: Physiological Reports
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