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https://www.readbyqxmd.com/read/28929362/brain-reactivity-to-visual-food-stimuli-after-moderate-intensity-exercise-in-children
#1
Travis D Masterson, C Brock Kirwan, Lance E Davidson, Michael J Larson, Kathleen L Keller, S Nicole Fearnbach, Alyssa Evans, James D LeCheminant
Exercise may play a role in moderating eating behaviors. The purpose of this study was to examine the effect of an acute bout of exercise on neural responses to visual food stimuli in children ages 8-11 years. We hypothesized that acute exercise would result in reduced activity in reward areas of the brain. Using a randomized cross-over design, 26 healthy weight children completed two separate laboratory conditions (exercise; sedentary). During the exercise condition, each participant completed a 30-min bout of exercise at moderate-intensity (~ 67% HR maximum) on a motor-driven treadmill...
September 19, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28928671/aerobic-exercise-training-selectively-changes-oxysterol-levels-and-metabolism-reducing-cholesterol-accumulation-in-the-aorta-of-dyslipidemic-mice
#2
Guilherme Silva Ferreira, Paula R Pinto, Rodrigo T Iborra, Vanessa Del Bianco, Monique Fátima Mello Santana, Edna Regina Nakandakare, Valéria S Nunes, Carlos E Negrão, Sergio Catanozi, Marisa Passarelli
Background: Oxysterols are bioactive lipids that control cellular cholesterol synthesis, uptake, and exportation besides mediating inflammation and cytotoxicity that modulate the development of atherosclerosis. Aerobic exercise training (AET) prevents and regresses atherosclerosis by the improvement of lipid metabolism, reverse cholesterol transport (RCT) and antioxidant defenses in the arterial wall. We investigated in dyslipidemic mice the role of a 6-week AET program in the content of plasma and aortic arch cholesterol and oxysterols, the expression of genes related to cholesterol flux and the effect of the exercise-mimetic AICAR, an AMPK activator, in macrophage oxysterols concentration...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28925651/exercise-stress-testing-indications-and-common-questions
#3
Kathryn K Garner, William Pomeroy, James J Arnold
Exercise stress testing is a validated diagnostic test for coronary artery disease in symptomatic patients, and is used in the evaluation of patients with known cardiac disease. Testing of asymptomatic patients is generally not indicated. It may be performed in select deconditioned adults before starting a vigorous exercise program, but no studies have compared outcomes from preexercise testing vs. encouraging light exercise with gradual increases in exertion. Preoperative exercise stress testing is helpful for risk stratification in patients undergoing vascular surgery or who have active cardiac symptoms before undergoing nonemergent noncardiac surgery...
September 1, 2017: American Family Physician
https://www.readbyqxmd.com/read/28922681/exercise-training-protects-cardiomyocytes-from-deleterious-effects-of-palmitate
#4
Marcia Netto Magalhães Alves, Danilo Roman-Campos, Amanda B Parreira, Pedro W M Almeida, Jader Santos Cruz, Silvia Guatimosim, Marco Fabricio Dias-Peixoto
We investigated the effects of palmitate, a high saturated fat, on Ca(2+), action potential and reactive oxygen species dynamics in cardiomyocytes from untrained and trained mice. Male mice were subjected to moderate intensity exercise training on a treadmill. Cardiomyocytes of untrained and trained mice were isolated, treated for 30 min with palmitate and intracellular calcium transient and action potential duration were recorded. Additionally, we assessed reactive oxygen species generation. Treatment of cardiomyocytes from untrained mice with palmitate induced a significant decrease in Ca(2+) transient magnitude by 34%...
September 18, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28922507/randomized-controlled-trial-evaluating-the-temporal-effects-of-high-intensity-exercise-on-learning-short-term-and-long-term-memory-and-prospective-memory
#5
Emily Frith, Eveleen Sng, Paul D Loprinzi
To examine the temporal effects of high-intensity exercise on learning, short-term and long-term retrospective memory and prospective memory. Among a sample of 88 young adult participants, 22 were randomized into one of four different groups: exercise before learning, control group, exercise during learning and exercise after learning. The retrospective assessments (learning, short-term and long-term memory) were assessed using the Rey Auditory Verbal Learning Test. Short-term memory included a 20-min delay assessment, with long-term memory including a 24-hour follow-up assessment...
September 18, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28919891/moderate-intensity-exercise-affects-gut-microbiome-composition-and-influences-cardiac-function-in-myocardial-infarction-mice
#6
Zuheng Liu, Hai-Yue Liu, Haobin Zhou, Qiong Zhan, Wenyan Lai, Qingchun Zeng, Hao Ren, Dingli Xu
Physical exercise is commonly regarded as protective against cardiovascular disease (CVD). Recent studies have reported that exercise alters the gut microbiota and that modification of the gut microbiota can influence cardiac function. Here, we focused on the relationships among exercise, the gut microbiota and cardiac function after myocardial infarction (MI). Four-week-old C57BL/6J mice were exercised on a treadmill for 4 weeks before undergoing left coronary artery ligation. Cardiac function was assessed using echocardiography...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28916822/ampk-phosphorylation-of-ulk1-is-required-for-targeting-of-mitochondria-to-lysosomes-in-exercise-induced-mitophagy
#7
Rhianna C Laker, Joshua C Drake, Rebecca J Wilson, Vitor A Lira, Bevan M Lewellen, Karen A Ryall, Carleigh C Fisher, Mei Zhang, Jeffrey J Saucerman, Laurie J Goodyear, Mondira Kundu, Zhen Yan
Mitochondrial health is critical for skeletal muscle function and is improved by exercise training through both mitochondrial biogenesis and removal of damaged/dysfunctional mitochondria via mitophagy. The mechanisms underlying exercise-induced mitophagy have not been fully elucidated. Here, we show that acute treadmill running in mice causes mitochondrial oxidative stress at 3-12 h and mitophagy at 6 h post-exercise in skeletal muscle. These changes were monitored using a novel fluorescent reporter gene, pMitoTimer, that allows assessment of mitochondrial oxidative stress and mitophagy in vivo, and were preceded by increased phosphorylation of AMP activated protein kinase (Ampk) at tyrosine 172 and of unc-51 like autophagy activating kinase 1 (Ulk1) at serine 555...
September 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28916639/small-rna-seq-during-acute-maximal-exercise-reveal-rnas-involved-in-vascular-inflammation-and-cardiometabolic-health
#8
Ravi Shah, Ashish S Yeri, Avash Das, Amanda Courtright-Lim, Olivia Ziegler, Ernest Gervino, Jeffrey Ocel, Pablo Quintero Pinzon, Luke Wooster, Cole Shields Bailey, Kahraman Tanriverdi, Lea Beaulieu, Jane E Freedman, Ionita Ghiran, Gregory D Lewis, Kendall Van Keuren-Jensen, Saumya Das
OBJECTIVE: Exercise improves cardiometabolic and vascular function, though mechanisms remain unclear. Our objective was to demonstrate the diversity of circulating extracellular RNA (ex-RNA) release during acute exercise in humans and its relevance to exercise-mediated benefits on vascular inflammation. Approach and Results: We performed plasma small RNA sequencing (RNA-seq) in 26 individuals undergoing symptom-limited maximal treadmill exercise, with replication of our top candidate miRNA in a separate cohort of 59 individuals undergoing bicycle ergometry...
September 15, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28915538/long-term-t3-and-t4-treatment-as-an-alternative-to-aerobic-exercise-training-in-improving-cardiac-function-post-myocardial-infarction
#9
Rayane Brinck Teixeira, Alexsandra Zimmer, Alexandre Luz de Castro, Bruna Gazzi de Lima-Seolin, Patrick Türck, Rafaela Siqueira, Adriane Belló-Klein, Pawan K Singal, Alex Sander da Rosa Araujo
Here we aimed to compare the beneficial effects of T3 and T4 hormone treatment to those provided by aerobic exercise training in Wistar rats post-myocardial infarction (MI). Rats in one group were SHAM-operated and in the other group were subjected to MI surgery. One week after surgery, the MI group animals either received T3 and T4 hormones by gavage or underwent a low intensity aerobic exercise training protocol on a treadmill, and both treatments lasted until 10 weeks after MI. Untreated SHAM-operated and MI groups were also followed for the same duration...
September 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28910193/lifestyle-markers-predict-cognitive-function
#10
Steven C Masley, Richard Roetzheim, Gwendolyn Clayton, Angela Presby, Kelley Sundberg, Lucas V Masley
OBJECTIVE: Rates of mild cognitive impairment and Alzheimer's disease are increasing rapidly. None of the current treatment regimens for Alzheimer's disease are effective in arresting progression. Lifestyle choices may prevent cognitive decline. This study aims to clarify which factors best predict cognitive function. METHODS: This was a prospective cross-sectional analysis of 799 men and women undergoing health and cognitive testing every 1 to 3 years at an outpatient center...
September 14, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28903627/reliability-and-minimal-detectable-change-of-a-new-treadmill-based-progressive-workload-incremental-test-to-measure-cardiorespiratory-fitness-in-manual-wheelchair-users
#11
Cindy Gauthier, Jasmine Arel, Rachel Brosseau, Audrey L Hicks, Dany H Gagnon
Background Cardiorespiratory fitness training is commonly provided to manual wheelchair users (MWUs) in rehabilitation and physical activity programs, emphasizing the need for a reliable task-specific incremental wheelchair propulsion test. Objective Quantifying test-retest reliability and minimal detectable change (MDC) of key cardiorespiratory fitness measures following performance of a newly developed continuous treadmill-based wheelchair propulsion test (WPTTreadmill). Methods Twenty-five MWUs completed the WPTTreadmill on two separate occasions within one week...
September 13, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28902623/chronic-endurance-exercise-antagonizes-the-cardiac-ucp2-and-ucp3-protein-up-regulation-induced-by-nandrolone-decanoate
#12
Gholamreza Bayat, Mohammad Javan, Azadeh Khalili, Fatemeh Safari, Saeed Shokri, Sohrab Hajizadeh
BACKGROUND: Several lines of evidence revealed that chronic treatment of anabolic androgenic steroids (AASs) is accompanied with some cardiovascular side effects and in addition they also negatively mask the beneficial effects of exercise training on cardiac performance. METHODS: The present study examined whether the nandrolone decanoate (ND)-induced cardiac effects were mediated by changing the cardiac uncoupling protein 2 (UCP2) and 3 (UCP3) expression. Five groups of male wistar-albino rats including sedentary control (SC), sedentary vehicle (SV), sedentary nandrolone decanoate (SND), exercise control (EC), and exercise nandrolone decanoate (END) were used...
September 13, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28902127/altered-gene-expression-of-rnf34-and-pacap-possibly-involved-in-mechanism-of-exercise-induced-analgesia-for-neuropathic-pain-in-rats
#13
Shintaro Yamaoka, Yusuke Oshima, Hideki Horiuchi, Tadao Morino, Masayuki Hino, Hiromasa Miura, Tadanori Ogata
Despite the availability of several modalities of treatment, including surgery, pharmacological agents, and nerve blocks, neuropathic pain is often unresponsive and sometimes progresses to intractable chronic pain. Although exercise therapy is a candidate for treatment of neuropathic pain, the mechanism underlying its efficacy has not been elucidated. To clarify the molecular mechanism for pain relief induced by exercise, we measured Rnf34 and Pacap mRNA levels in the spinal cord dorsal horn of SNL rats, a model of neuropathic pain...
September 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28899858/redd1-induction-regulates-the-skeletal-muscle-gene-expression-signature-following-acute-aerobic-exercise
#14
Bradley S Gordon, Jennifer L Steiner, Michael L Rossetti, Shuxi Qiao, Leif W Ellisen, Subramaniam S Govindarajan, Alexey M Eroshkin, Dave L Williamson, Paul M Coen
The metabolic stress placed on skeletal muscle by aerobic exercise promotes acute and long-term health benefits in part through changes in gene expression. However, the transducers that mediate altered gene expression signatures have not been completely elucidated. Regulated in Development and DNA Damage 1 (REDD1) is a stress-induced protein whose expression is transiently increased in skeletal muscle following acute aerobic exercise. However, the role of this induction remains unclear. Because REDD1 altered gene expression in other model systems, we sought to determine whether REDD1 induction following acute exercise altered the gene expression signature in muscle...
September 12, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28898133/differential-impact-of-treadmill-training-on-stroke-induced-neurological-disorders
#15
Rasoul Rezaei, Maryam Nourshahi, Fariba Khodagholi, Abbas Haghparast, Sanaz Nasoohi, Mohammadreza Bigdeli, Ghorbangol Ashabi
OBJECTIVE: Physical exercise contributes to improving stability against nerve injury caused by ischaemic stroke. Here we aimed to preliminarily investigate the effects of continuous endurance training (CET) and high-intensity interval training (HIT) on stroke-associated anxiety, locomotion, neurological assessments and P70S6 Kinase (P70S6K) activation as well. To do this, rats were trained according to HIT and CET protocols for 2 months prior to being subject to middle cerebral artery occlusion surgery...
September 12, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28895489/effects-of-mild-running-on-substantia-nigra-during-early-neurodegeneration
#16
Michael F Almeida, Carolliny M Silva, Rodrigo S Chaves, Nathan C R Lima, Renato S Almeida, Karla P Melo, Marilene Demasi, Tiago Fernandes, Edilamar M Oliveira, Luis E S Netto, Sandra M Cardoso, Merari F R Ferrari
Moderate physical exercise acts at molecular and behavioural levels, such as interfering in neuroplasticity, cell death, neurogenesis, cognition and motor functions. Therefore, the aim of this study is to analyse the cellular effects of moderate treadmill running upon substantia nigra during early neurodegeneration. Aged male Lewis rats (9-month-old) were exposed to rotenone 1mg/kg/day (8 weeks) and 6 weeks of moderate treadmill running, beginning 4 weeks after rotenone exposure. Substantia nigra was extracted and submitted to proteasome and antioxidant enzymes activities, hydrogen peroxide levels and Western blot to evaluate tyrosine hydroxylase (TH), alpha-synuclein, Tom-20, PINK1, TrkB, SLP1, CRMP-2, Rab-27b, LC3II and Beclin-1 level...
September 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28887315/inorganic-nitrate-in-angina-study-a-randomized-double-blind-placebo-controlled-trial
#17
Konstantin Schwarz, Satnam Singh, Satish K Parasuraman, Amelia Rudd, Lee Shepstone, Martin Feelisch, Magdalena Minnion, Shakil Ahmad, Melanie Madhani, John Horowitz, Dana K Dawson, Michael P Frenneaux
BACKGROUND: In this double-blind randomized placebo-controlled crossover trial, we investigated whether oral sodium nitrate, when added to existing background medication, reduces exertional ischemia in patients with angina. METHODS AND RESULTS: Seventy patients with stable angina, positive electrocardiogram treadmill test, and either angiographic or functional test evidence of significant ischemic heart disease were randomized to receive oral treatment with either placebo or sodium nitrate (600 mg; 7 mmol) for 7 to 10 days, followed by a 2-week washout period before crossing over to the other treatment (n=34 placebo-nitrate, n=36 nitrate-placebo)...
September 8, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28885962/cold-acclimation-does-not-alter-physiological-or-perceptual-responses-during-subsequent-exercise-in-the-heat
#18
Douglas M Jones, Kaitlyn A Rostomily, Carina M Pautz, Danica W Ito, Stephen P Bailey, Bart Roelands, Michael J Buono, Romain Meeusen
INTRODUCTION: Warfighters often train and conduct operations in cold environments. Specifically, military trainees and divers that are repeatedly exposed to cold water may experience inadvertent cold acclimatization, which results in body heat retention. These same warfighters can quickly switch between environments (cold to hot or hot to cold) given the nature of their work. This may present a risk of early onset of hyperthermia when cold-acclimatized warfighters are subsequently exposed to physiological insults that increase body temperature, such as exercise and heat stress...
September 2017: Military Medicine
https://www.readbyqxmd.com/read/28885279/the-impact-of-reduced-cardiac-rehabilitation-on-maximal-treadmill-exercise-time-a-randomized-controlled-trial
#19
Alejandra Farias-Godoy, Sammy Chan, Victoria E Claydon, Andrew Ignaszewski, Joanna Mendell, Julie E Park, Joel Singer, Scott A Lear
PURPOSE: Cardiac rehabilitation programs (CRPs) remain underutilized partly because of access barriers. We therefore evaluated a CRP with fewer center-based sessions (rCRP) compared with standard CRP (sCRP) with respect to changes in exercise capacity and cardiac risk factors. METHODS: In this randomized controlled noninferiority trial, primary and secondary prevention patients at low and moderate risk were randomized to an sCRP (n = 60) or an rCRP (n = 61). Over 4 months, sCRP and rCRP participants attended 32 and 10 on-site cardiac rehabilitation sessions, respectively...
September 6, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28883534/biological-effects-of-dosing-aerobic-exercise-and-neuromuscular-electrical-stimulation-in-rats
#20
Stefania Dalise, Loredana Cavalli, Harmanvir Ghuman, Brendon Wahlberg, Madeline Gerwig, Carmelo Chisari, Fabrisia Ambrosio, Michel Modo
Aerobic exercise (AE) and non-aerobic neuromuscular electric stimulation (NMES) are common interventions used in physical therapy. We explored the dose-dependency (low, medium, high) of these interventions on biochemical factors, such as brain derived neurotrophic growth factor (BDNF), vascular endothelial growth factor-A (VEGF-A), insulin-like growth factor-1 (IGF-1) and Klotho, in the blood and brain of normal rats, as well as a treadmill-based maximum capacity test (MCT). A medium dose of AE produced the most improvement in MCT with dose-dependent changes in Klotho in the blood...
September 7, 2017: Scientific Reports
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