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https://www.readbyqxmd.com/read/28919930/effects-of-12-weeks-of-nordic-walking-and-xco-walking-training-on-the-endurance-capacity-of-older-adults
#1
Tobias Morat, Jenny Krueger, Angus Gaedtke, Manuela Preuss, Joachim Latsch, Hans-Georg Predel
BACKGROUND: Several studies have already examined the positive effects of various forms of endurance training in patient groups and in healthy adults up to 60 years old. The aim of this study was to analyse the effects of Nordic Walking (NW) and XCO Walking (XCO) training on endurance capacity in healthy older adults, aged 60 years and older. METHODS: Twenty-three older participants (mean age: 69.9 ± 5.4 years) were randomly assigned to either the NW group or the XCO group...
2017: European Review of Aging and Physical Activity
https://www.readbyqxmd.com/read/28918895/a-method-for-determining-exercise-oscillatory-ventilation-in-heart-failure-prognostic-value-and-practical-implications
#2
Baruch Vainshelboim, Aisha Amin, Jeffrey W Christle, Shreyas Hebbal, Euan A Ashley, Jonathan Myers
BACKGROUND: Exercise oscillatory ventilation (EOV) has been shown to be a powerful prognostic marker in chronic heart failure (CHF). However, EOV is poorly defined, its measurement lacks standardization and it is underutilized in clinical practice. The purpose of this pilot study was to investigate the prognostic value of a modified definition of EOV in patients with CHF. METHODS: Eighty-nine CHF patients (56.5±8.4years) (64% NYHA class III-IV) underwent cardiopulmonary exercise testing...
September 14, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28911142/deficient-endogenous-glucose-production-during-exercise-after-total-pancreatectomy-islet-autotransplantation
#3
Lindsey D Bogachus, Elizabeth Oseid, Melena Bellin, Adrian Vella, R Paul Robertson
Context: Total pancreatectomy followed by intrahepatic islet autotransplantation (TP/IAT) is performed to alleviate severe, unrelenting abdominal pain caused by chronic pancreatitis, to improve quality of life, and to prevent diabetes. Objective: To determine the cause of exercise-induced hypoglycemia that is a common complaint in TP/IAT recipients. Design: Participants completed 1 hour of steady-state exercise. Setting: Hospital research unit...
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28905051/scaling-behavior-of-oxide-based-electrothermal-threshold-switching-devices
#4
Dasheng Li, Jonathan M Goodwill, James A Bain, Marek Skowronski
Materials exhibiting insulator to metal transition (IMT) and transition metal oxides showing threshold switching behavior are considered as promising candidates for selector devices for crossbar non-volatile memory application. In this study, we use an electrothermal model to simulate the behavior of nanoscale selectors based on several different functional oxides (TaOx, VO2 and NbO2). We extract the device characteristics, such as threshold voltage (VTH), leakage current, device temperature in the ON state, and the size of the conductive filament as a function of selector diameter and functional layer thickness...
September 14, 2017: Nanoscale
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
#5
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/28902987/understanding-reduction-kinetics-of-aqueous-vanadium-v-and-transformation-products-using-rotating-ring-disk-electrode
#6
Gongde Chen, Haizhou Liu
Vanadium(V) is an emerging contaminant in the most recent EPA's candidate contaminant list (CCL4). The redox chemistry of vanadium controls its occurrence in the aquatic environment, but the impact of vanadium(V) speciation on its redox properties remains largely unknown. This study developed electrochemical techniques with a rotating ring disk electrode to examine the reduction kinetics of four pH-dependent vanadium(V) species in the presence and absence of phosphate. Results showed that the reduction of VO2+, HxV4O12+x(4+x)- (V4) and HVO42- proceeded via a one-electron transfer, while the reduction of NaxHyV10O28(6-x-y)- (V10) underwent a two-electron transfer process...
September 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28895624/development-of-an-incremental-sit-to-stand-exercise-for-aerobic-fitness-evaluation
#7
Keisuke Nakamura, Yuya Nagasawa, Shoji Sawaki, Yoshiharu Yokokawa, Masayoshi Ohira
Incremental sit-to-stand exercise (ISTS) is an incremental exercise test using external signals to control the sit-to-stand rate in a given time frame. This study aimed to investigate the concurrent validity and reproducibility of the ISTS in aerobic fitness evaluation among healthy elderly women. Sixteen elderly women performed the ISTS and cycle ergometer test at 3-day to 2-week intervals, and six of the participants performed the ISTS twice. Peak oxygen uptake (VO2), peak heart rate and completion time on the ISTS and cycle ergometer test were determined...
September 11, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28892419/the-effect-of-a-backpack-hip-strap-on-energy-expenditure-while-walking
#8
Jamie Pigman, William Sullivan, Steven Leigh, Peter A Hosick
Objective To examine the effect of backpack hip strap use on walking energy expenditure while carrying a loaded backpack. Background Previous studies have demonstrated that energy cost increases as the mass of the load carried increases. However, few investigations have focused on backpack carriage design. Methods Fifteen young, healthy, male subjects walked at a self-selected pace for 10 minutes in two backpack loading conditions: with a hip strap (strapped) and without a hip strap (nonstrapped). Oxygen consumption (VO2), rating of perceived exertion (RPE), respiratory exchange ratio (RER), and heart rate (HR) were monitored throughout each 10-minute trial...
September 1, 2017: Human Factors
https://www.readbyqxmd.com/read/28885281/correlation-between-exercise-capacity-and-quality-of-life-in-patients-with-cardiac-disease
#9
Karoline Stentoft Andersen, Sussie Laustsen, Annemette Krintel Petersen
PURPOSE: Patients are referred to exercise-based cardiac rehabilitation (ECR) to increase exercise capacity and health-related quality of life (HRQOL) and thereby reduce risk of morbidity and mortality. The purpose of this study was to examine the correlation between exercise capacity and HRQOL. Furthermore, this study examined whether improvements in HRQOL were directly related to improvements in exercise capacity. METHODS: The study included 277 patients participating in ECR...
September 6, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28883851/improvement-of-exercise-tolerance-in-cardiopulmonary-testing-with-sustained-safety-after-regular-training-in-outpatients-with-systolic-heart-failure-nyha-iii-and-an-implantable-cardioverter-defibrillator-prospective-18-month-randomized-study
#10
Edyta Smolis-Bąk, Hanna Rymuza, Barbara Kazimierska, Ilona Kowalik, Tomasz Chwyczko, Anna Borowiec, Witold Rongies, Agnieszka Jankowska, Hanna Szwed, Rafał Dąbrowski
INTRODUCTION: The aim of the study was to evaluate the impact of individual training on the level of physical capacity and echocardiographic parameters in patients with systolic heart failure (SHF), NYHA III and an implantable cardioverter-defibrillator (ICD). MATERIAL AND METHODS: The study included 84 patients with SHF, randomly assigned to one of two groups: with regular training (ICD-Ex) and a control group (ICD-control). The ICD-Ex group participated in a hospital rehabilitation program which after discharge was individually continued for 6 months in an outpatient setting...
August 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28882061/feasibility-of-a-home-based-exercise-intervention-with-remote-guidance-for-patients-with-stable-grade-ii-and-iii-gliomas-a-pilot-randomized-controlled-trial
#11
Karin Gehring, Corelien Jj Kloek, Neil K Aaronson, Kasper W Janssen, Lee W Jones, Margriet M Sitskoorn, Martijn M Stuiver
OBJECTIVE: In this pilot study, we investigated the feasibility of a home-based, remotely guided exercise intervention for patients with gliomas. DESIGN: Pilot randomized controlled trial (RCT) with randomization (2:1) to exercise or control group. SUBJECTS: Patients with stable grade II and III gliomas. INTERVENTION: The six-month intervention included three home-based exercise sessions per week at 60%-85% of maximum heart rate...
September 1, 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28881147/cardiorespiratory-demand-of-acute-voluntary-cycling-with-functional-electrical-stimulation-in-individuals-with-multiple-sclerosis-with-severe-mobility-impairment
#12
Thomas Edwards, Robert W Motl, Lara A Pilutti
BACKGROUND: Exercise training is one strategy for improving cardiorespiratory fitness (CRF) in multiple sclerosis (MS), however, few modalities are accessible for those with severe mobility impairment. Functional electrical stimulation (FES) cycling is one adapted exercise modality with the potential for improving CRF in people with severe MS. OBJECTIVES: To characterize the cardiorespiratory response of acute voluntary cycling with FES in people with MS with severe mobility impairment, and to compare this response to passive leg cycling...
September 7, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28877646/comparison-of-canadian-firefighters-and-normal-controls-based-on-the-submaximal-fitness-testing-and-strength-considering-age-and-gender
#13
Goris Nazari, Joy C MacDermid, Kathryn E Sinden R Kin, Tom J Overend
INTRODUCTION: Few studies have addressed whether the firefighters are more fit than the general population and possess sufficient levels of aerobic capacity and muscle strength to perform on duty tasks in a safe and efficient manner, considering age and gender. We aimed to evaluate the fitness levels of Hamilton firefighters, and to determine the effects of age and gender. METHODS: 89 participants were recruited. The Modified Canadian Aerobic Fitness Test was used to determine participants' estimated maximal oxygen consumptions (VO2-max) levels...
September 7, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28875871/wheat-germ-supplementation-alleviates-insulin-resistance-and-cardiac-mitochondrial-dysfunction-in-an-animal-model-of-diet-induced-obesity
#14
Babajide Ojo, Ashley J Simenson, Crystal O'Hara, Lei Wu, Xin Gou, Sandra K Peterson, Daniel Lin, Brenda J Smith, Edralin A Lucas
Obesity is strongly associated with insulin resistance (IR), along with mitochondrial dysfunction to metabolically active tissues and increased production of reactive O2 species (ROS). Foods rich in antioxidants such as wheat germ (WG), protect tissues from damage due to ROS and modulate some negative effects of obesity. This study examined the effects of WG supplementation on markers of IR, mitochondrial substrate metabolism and innate antioxidant markers in two metabolically active tissues (i.e. liver and heart) of C57BL/6 mice fed a high-fat-high-sucrose (HFS) diet...
August 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28872419/impact-of-scoliosis-severity-on-functional-capacity-in-patients-with-adolescent-idiopathic-scoliosis
#15
Bruna M A Saraiva, Geferson S Araujo, Evandro F Sperandio, Alberto O Gotfryd, Victor Z Dourado, Milena C Vidotto
The aim of this study is to evaluate the walked distance and physiological responses during Incremental Shuttle Walk Test (ISWT) in patients with different degrees of adolescent idiopathic scoliosis (AIS). METHOD: We evaluated 20 healthy teenagers and 46 with AIS were divided into two groups: AIS > 45° and AIS < 45º. The volunteers performed an ISWT and the following physiological responses were quantified: oxygen consumption (VO2), tidal volume (VT) and ventilation (VE) and the walked distance (ISWD)...
September 5, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28870770/mechanisms-of-the-improvement-in-peak-vo2-with-exercise-training-in-heart-failure-with-reduced-or-preserved-ejection-fraction
#16
REVIEW
Wesley J Tucker, Cecilia C Lijauco, Christopher M Hearon, Siddhartha S Angadi, Michael D Nelson, Satyam Sarma, Shane Nanayakkara, André La Gerche, Mark J Haykowsky
Heart failure (HF) is a major health care burden associated with high morbidity and mortality. Approximately 50% of HF patients have reduced ejection fraction (HFrEF) while the remainder of patients have preserved ejection fraction (HFpEF). A hallmark of both HF phenotypes is dyspnoea upon exertion and severe exercise intolerance secondary to impaired oxygen delivery and/or use by exercising skeletal muscle. Exercise training is a safe and effective intervention to improve peak oxygen uptake (VO2peak) and quality of life in clinically stable HF patients, however, evidence to date suggests that the mechanism of this improvement appears to be related to underlying HF phenotype...
August 4, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28869309/resting-heart-rate-heart-rate-reserve-and-metabolic-syndrome-in-professional-firefighters-a-cross-sectional-study
#17
BongKyoo Choi, SangBaek Ko, Stacey Kojaku
BACKGROUND: Little is known about the associations of resting heart rate (RHR) and heart rate reserve (HRR) with metabolic syndrome (MetS) in firefighters. METHODS: For each of 288 professional firefighters, HRR was calculated as the difference between measured RHR and estimated maximum HR. For comparison, VO2 max based on a treadmill test was included. MetS was defined according to the NCEP/ATP III criteria. RESULTS: The prevalence of MetS was 14...
September 4, 2017: American Journal of Industrial Medicine
https://www.readbyqxmd.com/read/28864949/skeletal-muscle-mitochondrial-mass-is-linked-to-lipid-and-metabolic-profile-in-individuals-with-spinal-cord-injury
#18
Laura C O'Brien, Qun Chen, Jeannie Savas, Edward J Lesnefsky, Ashraf S Gorgey
PURPOSE: Changes in metabolism and body composition after spinal cord injury (SCI) predispose individuals to obesity, type II diabetes, and cardiovascular disease. A link between lean mass and skeletal muscle mitochondrial mass has been reported but it is unknown how skeletal muscle mitochondrial mass and activity impact metabolic health. This study examined the relationship between skeletal muscle mitochondrial mass, activity and metabolic profile in individuals with chronic SCI. METHODS: Twenty-two men with motor complete SCI participated in the study...
September 1, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28863039/extracorporeal-membrane-oxygenation-for-end-stage-interstitial-lung-disease-with-secondary-pulmonary-hypertension-at-rest-and-exercise-insights-from-simulation-modeling
#19
Scott Chicotka, Daniel Burkhoff, Marc L Dickstein, Matthew Bacchetta
Interstitial lung disease (ILD) represents a collection of lung disorders with a lethal trajectory with few therapeutic options with the exception of lung transplantation. Various extracorporeal membrane oxygenation (ECMO) configurations have been used for bridge to transplant (BTT), yet no optimal configuration has been clearly demonstrated. Using a cardiopulmonary simulation, we assessed different ECMO configurations for patients with end-stage ILD to assess the physiologic deficits and help guide the development of new long-term pulmonary support devices...
August 31, 2017: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/28855670/photoinduced-strain-release-and-phase-transition-dynamics-of-solid-supported-ultrathin-vanadium-dioxide
#20
Xing He, Napat Punpongjareorn, Weizheng Liang, Yuan Lin, Chonglin Chen, Allan J Jacobson, Ding-Shyue Yang
The complex phase transitions of vanadium dioxide (VO2) have drawn continual attention for more than five decades. Dynamically, ultrafast electron diffraction (UED) with atomic-scale spatiotemporal resolution has been employed to study the reaction pathway in the photoinduced transition of VO2, using bulk and strain-free specimens. Here, we report the UED results from 10-nm-thick crystalline VO2 supported on Al2O3(0001) and examine the influence of surface stress on the photoinduced structural transformation...
August 30, 2017: Scientific Reports
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