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https://www.readbyqxmd.com/read/28231604/variations-in-body-morphology-explain-gender-differences-in-thermoeffector-function-during-compensable-heat-stress
#1
Sean R Notley, Joonhee Park, Kyoko Tagami, Norikazu Ohnishi, Nigel A S Taylor
Gender is sometimes thought to independently modulate cutaneous vasomotor and sudomotor function during heat exposure. Nevertheless, it was hypothesised that, when assessed during compensable exercise that evoked equal heat-loss requirements across participants, gender differences in those thermoeffectors would be explained by variations in the ratio between body surface area and mass (specific surface area). To evaluate that possibility, vasomotor and sudomotor functions were assessed in sixty individuals (36 males, 24 females) with widely varying (overlapping) specific surface areas (range: 232...
February 23, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28229629/protective-effect-of-crocin-and-voluntary-exercise-against-oxidative-stress-in-the-heart-of-high-fat-diet-induced-type-2-diabetic-rats
#2
V Ghorbanzadeh, M Mohammadi, G Mohaddes, H Dariushnejad, L Chodari, S Mohammadi
Background Oxidative stress plays a critical role in the pathogenesis and progression of type 2 diabetes and diabetic-associated cardiovascular complications. This study investigated the impact of crocin combined with voluntary exercise on heart oxidative stress indicator in high-fat diet-induced type 2 diabetic rats. Materials and methods Rats were divided into four groups: diabetes, diabetic-crocin, diabetic-voluntary exercise, diabetic-crocin-voluntary exercise. Type 2 diabetes was induced by high-fat diet (4 weeks) and injection of streptozotocin (intraperitoneally, 35 mg/kg)...
December 2016: Physiol Int
https://www.readbyqxmd.com/read/28229572/coenzyme-q10-does-not-prevent-exercise-induced-muscle-damage-and-oxidative-stress-in-sedentary-men
#3
Nilsel Okudan, Muaz Belviranli, Savaş Torlak
BACKGROUND: The objective of this study was to examine the effects of coenzyme Q10 (CoQ10) supplementation on exercise-induced muscle damage and oxidative stress in sedentary young men. In this study, a total of twenty one sedentary and healthy young men participated. METHODS: Participants were assigned at random to a CoQ10 or a placebo group employing a double-blind method. Those in the CoQ10 group ingested 200 mg CoQ10 per day for 4 weeks. Those in the placebo group ingested the same dosage of a placebo...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28229255/nordic-walking-training-attenuation-of-oxidative-stress-in-association-with-a-drop-in-body-iron-stores-in-elderly-women
#4
Jakub Kortas, Agnieszka Kuchta, Krzysztof Prusik, Katarzyna Prusik, Ewa Ziemann, Sandra Labudda, Agnieszka Ćwiklińska, Ewa Wieczorek, Maciej Jankowski, Jedrzej Antosiewicz
Excess body iron accumulation and oxidative stress has been associated with ageing. Regular exercise has been shown to reduce oxidative stress and induce some changes in iron metabolism. However, the effects of exercise on both of these parameters have been poorly investigated. In our study, 35 elderly women participated in 12 weeks of Nordic walking (NW) training (three times a week). We demonstrated that the training caused a significant reduction in malondialdehyde advanced oxidation protein products-markers of oxidative stress but had no effects on paraoxonase 1 activity...
February 22, 2017: Biogerontology
https://www.readbyqxmd.com/read/28228661/feasibility-of-an-exercise-intervention-for-fatigued-breast-cancer-patients-at-a-community-based-cardiac-rehabilitation-program
#5
Stefanie De Jesus, Lyndsay Fitzgeorge, Karen Unsworth, David Massel, Neville Suskin, Harry Prapavessis, Michael Sanatani
PURPOSE: Exercise is beneficial to quality of life after cancer treatment, yet few cancer survivors meet exercise guidelines. Our study sought to determine the feasibility of an oncology rehabilitation exercise program embedded within a cardiac rehabilitation program. METHODS: Patients who rated their fatigue >4/10 after completion of adjuvant chemotherapy for breast cancer were screened for eligibility and the outcomes were assessed (Piper Fatigue Scale, Functional Assessment of Cancer Therapy-Breast [FACT-B], Edmonton Symptom Assessment System, body composition, stress test, and physical activity measurement [accelerometer])...
2017: Cancer Management and Research
https://www.readbyqxmd.com/read/28225578/detection-of-volume-alterations-in-hippocampal-subfields-of-rats-under-chronic-unpredictable-mild-stress-using-7t-mri-a-follow-up-study
#6
Yuefeng Li, Xiaolan Zhu, Shenghong Ju, Jinchuan Yan, Dongqing Wang, Yan Zhu, Fengchao Zang
PURPOSE: To determine hippocampal subfields volume loss in depression, which was simulated by a rat chronic unpredictable mild stress (CUMS) model. As different cellular and molecular characteristics in hippocampal subfields, these subfields are regarded as differentially vulnerable to processes associated with stress. MATERIALS AND METHODS: Twenty male Wistar rats were exposed to various stressors until the model was successfully established. The effects of physical exercise on recovery of hippocampal volume in depressed rats were simulated using the wheel running test (WRT)...
February 22, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28225475/stretching-exercises-improve-vascular-endothelial-dysfunction-through-attenuation-of-oxidative-stress-in-chronic-heart-failure-patients-with-an-implantable-cardioverter-defibrillator
#7
Michitaka Kato, Takashi Masuda, Michio Ogano, Kazuki Hotta, Hisato Takagi, Shinya Tanaka, Yumi Kamada, Ayako Akiyama, Daisuke Kamekawa, Ryosuke Shimizu, Minoru Tabata, Jun Tanabe, Takuya Umemoto
PURPOSE: Endurance training improves oxidative stress and vascular endothelial dysfunction in patients with chronic heart failure (CHF). However, patients with CHF and an implantable cardioverter defibrillator (ICD) or cardiac resynchronization therapy-defibrillator (CRT-D) often avoid endurance training for fear of ICD shock. Recent studies have reported that stretching exercises enhance antioxidant activity and improve vascular responses. Therefore, we aimed to assess the effects of 4 weeks of stretching exercises on oxidative stress and vascular endothelial function in patients with CHF with an ICD or CRT-D...
March 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28225205/greater-endurance-capacity-and-improved-dyspnoea-with-acute-oxygen-supplementation-in-idiopathic-pulmonary-fibrosis-patients-without-resting-hypoxaemia
#8
Leona M Dowman, Christine F McDonald, Steven Bozinovski, Ross Vlahos, Rebecca Gillies, Dodie Pouniotis, Catherine J Hill, Nicole S L Goh, Anne E Holland
BACKGROUND AND OBJECTIVE: Supplemental oxygen is commonly prescribed in patients with idiopathic pulmonary fibrosis (IPF), although its benefits have not been proven. The aims of this study were to investigate the effect of oxygen on oxidative stress, cytokine production, skeletal muscle metabolism and physiological response to exercise in IPF. METHODS: Eleven participants with IPF received either oxygen, at an FiO2 of 0.50, or compressed air for 1 h at rest and during a cycle endurance test at 85% of peak work rate...
February 22, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28224449/the-exerrt-trial-exercise-to-regadenoson-in-recovery-trial-a-phase-3b-open-label-parallel-group-randomized-multicenter-study-to-assess-regadenoson-administration-following-an-inadequate-exercise-stress-test-as-compared-to-regadenoson-without-exercise-for-myocardial
#9
Gregory S Thomas, S James Cullom, Therese M Kitt, Kathleen M Feaheny, Karthikeyan Ananthasubramaniam, Robert J Gropler, Diwakar Jain, Randall C Thompson
BACKGROUND: This study assessed the non-inferiority and safety of regadenoson administration during recovery from inadequate exercise compared with administration without exercise. METHODS: Patients unable to achieve adequate exercise stress were randomized to regadenoson 0.4 mg either during recovery (Ex-Reg) or 1 hour after inadequate exercise (Regadenoson) (MPI1). All patients also underwent non-exercise regadenoson MPI 1-14 days later (MPI2). The number of segments with reversible perfusion defects (RPDs) detected using single photon emission computerized tomography imaging was categorized...
February 21, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28223957/eeg-brain-activity-in-dynamic-health-qigong-training-same-effects-for-mental-practice-and-physical-training
#10
Diana Henz, Wolfgang I Schöllhorn
In recent years, there has been significant uptake of meditation and related relaxation techniques, as a means of alleviating stress and fostering an attentive mind. Several electroencephalogram (EEG) studies have reported changes in spectral band frequencies during Qigong meditation indicating a relaxed state. Much less is reported on effects of brain activation patterns induced by Qigong techniques involving bodily movement. In this study, we tested whether (1) physical Qigong training alters EEG theta and alpha activation, and (2) mental practice induces the same effect as a physical Qigong training...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28222572/effects-of-exercise-on-learning-and-memory-oxidative-stress-and-nnos-expression-in-marginal-division-of-striatum-of-the-ovariectomized-rats
#11
Jianmei Cui, Yanlan Guo, Wenyan Yang, Xingrui Zhao, Fang Yu, Wei Tang, Bianhua Pang, Xiaoyun Su
BACKGROUND: Since previous studies have shown that ovariectomy impairs memory and cognition, we investigated whether 8-week treadmill exercise would affect ovariectomy-induced memory deficits and explore the possible mechanisms of physical exercise influencing spatial learning and memory of the ovariectomized rats by detecting the rat's brain free radical metabolism and counting nNOS expression in marginal division of the striatum(MrD). METHODS: 40 female rats were assigned to one of the following groups: SHAM, SHAM+E, OVX and OVX+E group...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28219898/sk4-k-channels-are-therapeutic-targets-for-the-treatment-of-cardiac-arrhythmias
#12
Shiraz Haron-Khun, David Weisbrod, Hanna Bueno, Dor Yadin, Joachim Behar, Asher Peretz, Ofer Binah, Edith Hochhauser, Michael Eldar, Yael Yaniv, Michael Arad, Bernard Attali
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a stress-provoked ventricular arrhythmia, which also manifests sinoatrial node (SAN) dysfunction. We recently showed that SK4 calcium-activated potassium channels are important for automaticity of cardiomyocytes derived from human embryonic stem cells. Here SK4 channels were identified in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) from healthy and CPVT2 patients bearing a mutation in calsequestrin 2 (CASQ2-D307H) and in SAN cells from WT and CASQ2-D307H knock-in (KI) mice...
February 20, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28219102/no-evidence-of-racial-differences-in-endothelial-function-and-exercise-blood-flow-in-young-healthy-males-following-acute-antioxidant-supplementation
#13
Rebecca M Kappus, Kanokwan Bunsawat, Alexander J Rosenberg, Bo Fernhall
This study investigated the effects of acute antioxidant supplementation on endothelial function, exercise blood flow and oxidative stress biomarkers in 9 young African American compared to 10 Caucasian males (25.7±1.2 years). We hypothesized that African American males would have lower exercise blood flow and endothelial responsiveness compared to Caucasian males, and these responses would be improved following antioxidant supplementation. Ultrasonography was used to measure blood flow during handgrip exercise...
February 20, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28218471/%C3%AE-4%C3%AE-%C3%AE-gabaa-receptors-in-dorsal-hippocampal-ca1-of-adolescent-female-rats-traffic-to-the-plasma-membrane-of-dendritic-spines-following-voluntary-exercise-and-contribute-to-protection-of-animals-from-activity-based-anorexia-through-localization-at-excitatory
#14
Chiye Aoki, Yi-Wen Chen, Tara Gunkali Chowdhury, Walter Piper
In hippocampal CA1 of adolescent female rodents, α4βδ-GABAA receptors (α4βδ-GABAA Rs) suppress excitability of pyramidal neurons through shunting inhibition at excitatory synapses. This contributes to anxiolysis of stressed animals. Socially isolated adolescent female rats with 8 days of wheel access, the last 4 days of which entail restricted food access, have been shown to exhibit excessive exercise, choosing to run instead of eat (activity-based anorexia [ABA]). Upregulation of α4βδ-GABAA Rs in the dorsal hippocampal CA1 (DH), seen among some ABA animals, correlates with suppression of excessive exercise...
February 20, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28217935/effects-of-individualized-exercise-program-on-physical-function-psychological-dimensions-and-health-related-quality-of-life-in-patients-with-chronic-kidney-disease-a-randomized-controlled-trial-in-china
#15
Qing Tang, Bin Yang, Fengyan Fan, Ping Li, Lei Yang, Yujie Guo
The aim of this study was to examine the effects of a 12-week home-based exercise program on physical function, psychological dimensions, and health-related quality of life for patients with chronic kidney disease. Ninety eligible patients were enrolled and randomly separated into the exercise group and the control group from November 2015 to May 2016. The exercise group received an individualized exercise program while the control group received only usual care and continued primary lifestyle. Physical function was measured using 6-minute walk test and 10 repetitions of the sit-to-stand test while psychological dimensions were assessed by the Hospital Anxiety and Depression scale and the Self-Efficacy for Exercise scale...
February 19, 2017: International Journal of Nursing Practice
https://www.readbyqxmd.com/read/28217412/exercises-that-facilitate-optimal-hamstring-and-quadriceps-co-activation-to-help-decrease-acl-injury-risk-in-healthy-females-a-systematic-review-of-the-literature
#16
Rachel Dedinsky, Lindsey Baker, Samuel Imbus, Melissa Bowman, Leigh Murray
BACKGROUND: Anterior cruciate ligament (ACL) injury is common among females due to many anatomic, hormonal, and neuromuscular risk factors. One modifiable risk factor that places females at increased risk of ACL injury is a poor hamstrings: quadriceps (H:Q) co-activation ratio, which should be 0.6 or greater in order to decrease the stress placed on the ACL. Exercises that produce more quadriceps dominant muscle activation can add to the tension placed upon the ACL, potentially increasing the risk of ACL injury...
February 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28217314/potential-role-for-clinical-calibration-to-increase-engagement-with-and-application-of-home-telemonitoring-a-report-from-the-heartcycle-programme
#17
Paloma Gastelurrutia, Josep Lupón, Mar Domingo, Wim Stut, Silviu Dovancescu, John Cleland, Lutz Frankenstein, Antoni Bayes-Genis
AIMS: There is a need for alternative strategies that might avoid recurrent admissions in patients with heart failure. home telemonitoring (HTM) to monitor patient's symptoms from a distance may be useful. This study attempts to assess changes in HTM vital signs in response to daily life activities (variations in medication, salt intake, exercise, and stress) and to establish which variations affect weight, blood pressure, and heart rate. METHODS AND RESULTS: We assessed 76 patients with heart failure (mean age 76 ± 10...
February 2017: ESC Heart Failure
https://www.readbyqxmd.com/read/28217027/adenosine-stress-induced-left-bundle-branch-block-during-technetium-99m-tetrofosmin-myocardial-perfusion-imaging
#18
Mohan Roop Jayanthi, Arun Sasikumar, Arun Kumar Reddy Gorla, Ashwani Sood, Anish Bhattacharya, Bhagwant Rai Mittal
The occurrence of left bundle branch block (LBBB) in electrocardiogram during exercise testing is a relatively rare finding. The incidence of LBBB during exercise testing ranges from 0.5% to 1.1%. The mechanism of exercise-induced LBBB (EI-LBBB) is poorly understood, but ischemia is a proposed etiology. Stress myocardial perfusion imaging (MPI) can be useful in patients with EI-LBBB to rule out coronary artery disease. Adenosine vasodilator stress is the preferred mode of stress in patients with LBBB for performing stress-MPI...
January 2017: World Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28216585/effect-of-indoor-temperature-on-physical-performance-in-older-adults-during-days-with-normal-temperature-and-heat-waves
#19
Ulrich Lindemann, Anja Stotz, Nina Beyer, Juha Oksa, Dawn A Skelton, Clemens Becker, Kilian Rapp, Jochen Klenk
Indoor temperature is relevant with regard to mortality and heat-related self-perceived health problems. The aim of this study was to describe the association between indoor temperature and physical performance in older adults. Eighty-one older adults (84% women, mean age 80.9 years, standard deviation 6.53) were visited every four weeks from May to October 2015 and additionally during two heat waves in July and August 2015. Indoor temperature, habitual gait speed, chair-rise performance and balance were assessed...
February 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28216547/mid-term-follow-up-of-school-aged-children-with-borderline-long-qt-interval
#20
Aya Miyazaki, Heima Sakaguchi, Yu Matsumura, Yosuke Hayama, Kanae Noritake, Jun Negishi, Etsuko Tsuda, Yoshihiro Miyamoto, Takeshi Aiba, Wataru Shimizu, Kengo Kusano, Isao Shiraishi, Hideo Ohuchi
BACKGROUND: There are no definitive diagnostic criteria or follow-up strategies for long QT syndrome (LQTS) in children with a borderline long QT interval (b-LQT).Methods and Results:We retrospectively evaluated the clinical course, genetic testing results, corrected QT interval (QTc), and LQTS score of 59 school-aged children (5-18 years old) with a b-LQT (400≤QTc<500 ms). Syncope, but neither aborted cardiac arrest nor sudden cardiac death, occurred in 2 patients during the follow-up (6±3...
February 18, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
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