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https://www.readbyqxmd.com/read/29745780/heat-acclimation-by-post-exercise-hot-water-immersion-in-the-morning-reduces-thermal-strain-during-morning-and-afternoon-exercise-heat-stress
#1
Michael J Zurawlew, Jessica A Mee, Neil P Walsh
PURPOSE: Recommendations state that to acquire the greatest benefit from heat acclimation the clock-time of heat acclimation sessions should match the clock-time of expected exercise-heat stress. It remains unknown if adaptations by post-exercise hot water immersion (HWI) demonstrate time of day dependent adaptations. Thus, we examined whether adaptations following post-exercise HWI completed in the morning were present during morning and afternoon exercise-heat stress. METHODS: Ten males completed an exercise-heat stress test commencing in the morning (0945-h: AM) and afternoon (1445-h: PM; 40 min; 65% V̇O2max treadmill run) before (PRE) and after (POST) heat acclimation...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29739647/estimation-of-the-blood-pressure-response-with-exercise-stress-testing
#2
Benjamin T Fitzgerald, Emma L Ballard, Gregory M Scalia
BACKGROUND: The blood pressure response to exercise has been described as a significant increase in systolic BP (sBP) with a smaller change in diastolic BP (dBP). This has been documented in small numbers, in healthy young men or in ethnic populations. This study examines these changes in low to intermediate risk of myocardial ischaemia in men and women over a wide age range. METHODS: Consecutive patients having stress echocardiography were analysed. Ischaemic tests were excluded...
April 20, 2018: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29732035/can-chronotropic-incompetence-predict-life-threatening-ventricular-arrhythmias-in-patients-with-stable-ischemic-heart-disease
#3
Yelena Rib, Gulnar Zhussupova, Gaukhar Igimbayeva, Ayan Abdrakhmanov, Seyed Farzad Jalali
Background: Chronotropic incompetence has prognostic value of all-cause and cardiovascular mortality in both patients with asymptomatic and symptomatic ischemic heart disease (IHD), regardless of traditional risk factors. The aim of this study was to investigate the relationship between chronotropic response during exercise test and the development of ventricular arrhythmias. Methods: 153 patients with stable ischemic heart disease were screened and observed during the 24 months since October 2014 in a university hospital in Astana Kazakhstan...
2018: Caspian Journal of Internal Medicine
https://www.readbyqxmd.com/read/29731178/exercise-capacity-and-the-obesity-paradox-in-heart-failure-the-fit-henry-ford-exercise-testing-project
#4
Paul A McAuley, Steven J Keteyian, Clinton A Brawner, Zeina A Dardari, Mahmoud Al Rifai, Jonathan K Ehrman, Mouaz H Al-Mallah, Seamus P Whelton, Michael J Blaha
OBJECTIVES: To assess the influence of exercise capacity and body mass index (BMI) on 10-year mortality in patients with heart failure (HF) and to synthesize these results with those of previous studies. PATIENTS AND METHODS: This large biracial sample included 774 men and women (mean age, 60±13 years; 372 [48%] black) with a baseline diagnosis of HF from the Henry Ford Exercise Testing (FIT) Project. All patients completed a symptom-limited maximal treadmill stress test from January 1, 1991, through May 31, 2009...
May 3, 2018: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/29722623/force-properties-of-skinned-cardiac-muscle-following-increasing-volumes-of-aerobic-exercise-in-rats
#5
Kevin Rudi Boldt, Jaqueline Lourdes Rios, Venus Joumaa, Walter Herzog
The positive effects of chronic endurance exercise training on health and performance have been well documented. These positive effects have been evaluated primarily at the structural level, and work has begun to evaluate mechanical adaptations of the myocardium. However, it remains poorly understood how the volume of exercise training affects cardiac adaptation. In order to gain some understanding, we subjected three-month-old Sprague-Dawley rats (N=23) to treadmill running for eleven weeks at one of three exercise volumes (moderate, high, and extra high)...
May 3, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29717304/effect-of-diets-with-goat-milk-fat-supplemented-with-exercise-on-anxiety-and-oxidative-stress-in-the-brains-of-adult-rats
#6
Mayara Queiroga Barbosa, Rita de Cássia Ramos Egypto Queiroga, Camila Carolina de Menezes Santos Bertozzo, Daline Fernandes de Souza Araújo, Louise Iara Gomes Oliveira, Jaielison Yandro Pereira Silva, Marco Aurélio Delmondes Bomfim, Gerlane Coelho Bernardo Guerra, Suedna Costa, Rui Bessa, Susana Alves, Juliana Kessia Barbosa Soares
The objective of this study is to evaluate the effects of a diet with goat milk fat supplemented with physical training on markers of oxidative stress in the brain and anxiety behavior in rats. Adult male rats were randomly divided into six groups (n = 10 per group): control sedentary (CON) and exercised (CON-EX) groups, goat milk fat sedentary (GM) and exercised (GM-EX) groups, goat milk fat enriched with CLA sedentary (GM-CLA) and exercised (GM-CLA-EX) groups. The exercised groups were submitted to treadmill running during four weeks...
May 2, 2018: Food & Function
https://www.readbyqxmd.com/read/29693717/left-ventricular-end-diastolic-volume-predicts-exercise-capacity-in-patients-with-a-normal-ejection-fraction
#7
Lakshmi Nambiar, Anita Li, Alan Howard, Martin LeWinter, Markus Meyer
BACKGROUND: Exercise capacity is a powerful predictor of all-cause mortality. The duration of exercise with treadmill stress testing is an important prognostic marker in both healthy subjects and patients with cardiovascular disease. Left ventricular (LV) structure is known to adapt to sustained changes in level of physical activity. HYPOTHESIS: Poor exercise capacity in patients with a preserved LV ejection fraction (LVEF) should be reflected in smaller LV dimensions, and a normal exercise capacity should be associated with larger LV dimensions, irrespective of comorbidities...
April 25, 2018: Clinical Cardiology
https://www.readbyqxmd.com/read/29688178/coronary-sinus-reducer-implantation-improves-symptoms-ischemia-and-physical-capacity-in-patients-with-refractory-angina-unsuitable-for-myocardial-revascularization-a-single-center-experience
#8
Maayan Konigstein, Samuel Bazan, Miri Revivo, Shmuel Banai
AIMS: To evaluate the clinical efficacy of the Coronary Sinus Reducer implantation in alleviating angina symptoms and improving objective ischemia parameters and indices of physical capacity Methods and results: Patient with refractory angina (CCS class 3-4) were treated with the Reducer. Baseline, and follow-up evaluation consisted of clinical assessment including completion of Seattle angina Questionnaire (SAQ) and CCS class evaluation, and objective assessment by treadmill exercise test, Dobutamine echocardiography and 6-minute walk test (6MWT)...
April 24, 2018: EuroIntervention
https://www.readbyqxmd.com/read/29677191/type-2-diabetic-aldehyde-dehydrogenase-2-mutant-mice-aldh-2-2-exhibiting-heart-failure-with-preserved-ejection-fraction-phenotype-can-be-determined-by-exercise-stress-echocardiography
#9
Guodong Pan, Srikar Munukutla, Ananya Kar, Joseph Gardinier, Rajarajan A Thandavarayan, Suresh Selvaraj Palaniyandi
E487K point mutation of aldehyde dehydrogenase (ALDH) 2 (ALDH2*2) in East Asians intrinsically lowers ALDH2 activity. ALDH2*2 is associated with diabetic cardiomyopathy. Diabetic patients exhibit heart failure of preserved ejection fraction (HFpEF) i.e. while the systolic heart function is preserved in them, they may exhibit diastolic dysfunction, implying a jeopardized myocardial health. Currently, it is challenging to detect cardiac functional deterioration in diabetic mice. Stress echocardiography (echo) in the clinical set-up is a procedure used to measure cardiac reserve and impaired cardiac function in coronary artery diseases...
2018: PloS One
https://www.readbyqxmd.com/read/29669616/comparison-of-thermal-manikin-modeling-and-human-subjects-response-during-use-of-cooling-devices-under-personal-protective-ensembles-in-the-heat
#10
Tyler Quinn, Jung-Hyun Kim, Yongsuk Seo, Aitor Coca
IntroductionPersonal protective equipment (PPE) recommended for use in West Africa during the Ebola outbreak increased risk for heat illness, and countermeasures addressing this issue would be valuable.Hypothesis/ProblemThe purpose of this study was to examine the physiological impact and heat perception of four different personal cooling devices (PCDs) under impermeable PPE during low-intensity exercise in a hot and humid environment using thermal manikin modeling and human testing. METHODS: Six healthy male subjects walked on a treadmill in a hot/humid environment (32°C/92% relative humidity [RH]) at three metabolic equivalents (METs) for 60 minutes wearing PPE recommended for use in West Africa and one of four different personal cooling devices (PCDs; PCD1, PCD2, PCD3, and PCD4) or no PCD for control (CON)...
April 19, 2018: Prehospital and Disaster Medicine
https://www.readbyqxmd.com/read/29668729/using-machine-learning-on-cardiorespiratory-fitness-data-for-predicting-hypertension-the-henry-ford-exercise-testing-fit-project
#11
Sherif Sakr, Radwa Elshawi, Amjad Ahmed, Waqas T Qureshi, Clinton Brawner, Steven Keteyian, Michael J Blaha, Mouaz H Al-Mallah
This study evaluates and compares the performance of different machine learning techniques on predicting the individuals at risk of developing hypertension, and who are likely to benefit most from interventions, using the cardiorespiratory fitness data. The dataset of this study contains information of 23,095 patients who underwent clinician- referred exercise treadmill stress testing at Henry Ford Health Systems between 1991 and 2009 and had a complete 10-year follow-up. The variables of the dataset include information on vital signs, diagnosis and clinical laboratory measurements...
2018: PloS One
https://www.readbyqxmd.com/read/29666096/devil-is-in-the-detail
#12
John Roshan Jacob, Amal Paul, Anoop George Alex
A 15-year-old girl of Asian origin, hailing from a rural agrarian background, presented with history of multiple episodes of dizziness for 3 years. The episodes were precipitated mostly by emotional and/or physical stress and relieved on lying down, with a few episodes culminating in transient loss of consciousness. As preliminary cardiac and neurological evaluation were normal, she was being treated by the primary physician as a case of probable psychogenic syncope, supported by the consistent association of the episodes with emotional stress...
April 17, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29662724/frequency-and-determinants-of-inappropriate-use-of-treadmill-stress-test-for-coronary-artery-disease
#13
Muhammad Bilal, Abdul Haseeb, Mohammad H Arshad, Altamash A Jaliawala, Iman Farooqui, Amna Minhas, Ahmedullah Hussaini, Arsalan A Khan, Sharjeel Ahmad, Zainab Saleem, Ozair Awan, Noor Us Sabahat, Araib Ayaz, Haania Rizwan
Background In developing countries like Pakistan, treatment is mediated by private and public healthcare setups with a limited budget for health facilities. Moreover, the inappropriate use of treadmill tests imposes a burden on healthcare resources and leads to unwarranted interventions. Our aim is to assess the prevalence and predictors of inappropriate referrals for the exercise tolerance test (ETT) to diagnose coronary artery disease (CAD) while taking public and private healthcare settings into consideration...
January 23, 2018: Curēus
https://www.readbyqxmd.com/read/29659080/influence-of-fitness-and-age-on-the-endothelial-response-to-acute-inflammation
#14
Elizabeth C Schroeder, Abbi D Lane-Cordova, Sushant M Ranadive, Tracy Baynard, Bo Fernhall
NEW FINDINGS: What is the central question of the study? The purpose of this study was to determine the effect of age and fitness on the vascular response to acute inflammation in younger and older adults. What is the main finding and its importance? In older adults, cardiorespiratory fitness level has a differential impact on endothelial function following acute inflammation: older moderately fit adults have a greater decrease in endothelial function, similar to that of younger adults...
April 16, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29581040/female-false-positive-exercise-stress-ecg-testing-fact-verses-fiction
#15
Benjamin T Fitzgerald, William M Scalia, Gregory M Scalia
BACKGROUND: Exercise stress testing is a well validated cardiovascular investigation. Accuracy for treadmill stress electrocardiograph (ECG) testing has been documented at 60%. False positive stress ECGs (exercise ECG changes with non-obstructive disease on anatomical testing) are common, especially in women, limiting the effectiveness of the test. This study investigates the incidence and predictors of false positive stress ECG findings, referenced against stress echocardiography (SE) as a standard...
March 7, 2018: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/29559338/long-term-treadmill-exercise-performed-to-chronic-social-isolated-rats-regulate-anxiety-behavior-without-improving-learning
#16
Ozge Selin Cevik, Leyla Sahin, Lulufer Tamer
AIM: The type and duration of exposure to stress is an important influence on emotional and cognitive functions. Learning is the adaptive response of the central nervous system that occurs in hippocampus which affects from environmental factors like exercise. In this study, we investigated effects of long term treadmill exercise on learning and behavior on chronic social isolated rat. MAIN METHODS: Male Wistar rats (n = 32) randomly assigned into four groups: control, exercised, social isolation, social isolation + exercise during postnatal days (PNDs) 21-34...
March 17, 2018: Life Sciences
https://www.readbyqxmd.com/read/29540636/physical-exercise-reduces-cytotoxicity-and-up-regulates-nrf2-and-upr-expression-in-circulating-cells-of-peripheral-artery-disease-patients-an-hypoxic-adaptation
#17
Anna Maria Fratta Pasini, Chiara Stranieri, Anna Maria Rigoni, Sergio De Marchi, Denise Peserico, Chiara Mozzini, Luciano Cominacini, Ulisse Garbin
AIM: Ischemia-reperfusion (I-R) produces reactive oxygen species (ROS) that damage cells and favour cytotoxicity and apoptosis in peripheral artery disease (PAD) patients. Since brief episodes of I-R (ischemic conditioning) protect cells against ischemic harms, we evaluated whether a short-course of supervised treadmill training, characterized by repeated episodes of I-R, makes peripheral blood mononuclear cells (PBMCs) from PAD patients with intermittent claudication more resistant to I-R injuries by reducing oxidative stress and by inducing an adaptative response of unfolded protein response (UPR) and nuclear factor-E2-related factor (Nrf2) pathway expression...
March 13, 2018: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/29534559/phytoproflex%C3%A2-supplementary-management-of-osteoarthrosis-a-supplement-registry
#18
Gianni Belcaro, Mark Dugall, Roberta Luzzi, Morio Hosoi, Andrea Ledda, Beatrice Feragalli, Shu Hu, Apurba Ganguly, Roberto Eggenhoffner, Ambra Corti, Luca Giacomelli
BACKGROUND: Curcumin is a powerful anti-oxidant that can be used to treat inflammation and pain in chronic conditions such as osteoarthrosis (OA). Phytoproflex® is characterized by an innovative delivery system that improves bioavailability of curcuminoids and could be useful in the management of OA. METHODS: This 4-week registry included 56 patients with knee OA treated according to the best standard management for symptomatic OA. On top of that, 24 patients used Phytoproflex® supplement preparation (an extract containing boswellic acid 90%, curcumin 20% and valeric acid 0...
April 2018: Minerva Medica
https://www.readbyqxmd.com/read/29519339/trials-and-tribulations-of-assessing-new-imaging-protocols-combining-vasodilator-stress-with-exercise
#19
REVIEW
Carlos D Davila, James E Udelson
Among all patients referred for stress myocardial perfusion imaging (MPI), a substantial proportion in contemporary practice cannot exercise. Another group of patients are those who are thought to be able to achieve an adequate workload with treadmill (or bicycle) exercise but do not achieve at least 85% of maximum predicted heart rate without developing symptoms. There has been substantial interest and literature on the adjunctive use of vasodilator stress during the same visit to generate best-quality results for patients who do not exercise adequately...
March 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29517774/can-coconut-oil-and-treadmill-exercise-during-the-critical-period-of-brain-development-ameliorate-stress-related-effects-on-anxiety-like-behavior-and-episodic-like-memory-in-young-rats
#20
Débora de Cássia da Silva, Maryane Gabriela Tavares, Camila Karina Brito do Nascimento, Eduardo Carvalho Lira, Ângela Amâncio Dos Santos, Luciana Maria Silva de Seixas Maia, Manuella Batista-de-Oliveira Hornsby
OBJECTIVE: Virgin coconut oil (CO) and treadmill exercise have been reported to improve memory performance in young rats. CO has also been associated with antistress properties in young, stressed mice. Therefore, in this study we aimed to investigate whether CO and treadmill exercise could synergistically ameliorate the effects of chronic stress on anxiety-like behavior and episodic-like memory in young rats. METHODS: The rats received CO and were exercised (Ex) from the 15th to the 45th day of life...
March 1, 2018: Food & Function
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