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https://www.readbyqxmd.com/read/27884959/cardiac-responses-to-exercise-distinguish-postural-orthostatic-tachycardia-syndrome-variants
#1
Paolo T Pianosi, Darrell R Schroeder, Philip R Fischer
We previously showed that one-third of adolescents with postural orthostatic tachycardia syndrome (POTS) have hyperkinetic circulation. In a subsequent cohort, we compare participants with POTS grouped according to cardiac output (Q˙) versus oxygen uptake (V˙O2) function, whose circulatory response to exercise lay at the lower end of this distribution. We hypothesized that such grouping determines the circulatory response to incremental-protocol, upright, cycle ergometry by whatever blend of flow and resistance adjustments best maintains normal blood pressure...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27858577/long-term-endurance-training-increases-serum-cathepsin-s-and-decreases-il-6-and-hscrp-levels
#2
Michael Sponder, Ioana-Alexandra Campean, Michael Emich, Monika Fritzer-Szekeres, Brigitte Litschauer, Jutta Bergler-Klein, Senta Graf, Jeanette Strametz-Juranek
Cathepsin S (CS) was shown to play a key role in cancer progression, atherosclerosis, heart valve disease, insulin resistance and diabetes mellitus. The present prospective study aimed to investigate the influence of sports on CS, interleukin-6 (Il-6) and high-sensitivity C-reactive protein (hsCRP) levels. Ninety-eight of 109 participants completed the study. Ergometries were performed at baseline and after 8 months to evaluate/quantify the performance gain. Blood samples were taken at baseline and every 2 months...
November 18, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27857959/head-temperature-modulates-thermal-behavior-in-the-cold-in-humans
#3
Toby Mündel, Aaron Raman, Zachary J Schlader
We tested the hypothesis that skin temperature, specifically of the head, is capable of modulating thermal behavior during exercise in the cold. Following familiarization 8 young, healthy, recreationally active males completed 3 trials, each consisting of 30 minutes of self-paced cycle ergometry in 6°C. Participants were instructed to control their exercise work rate to achieve and maintain thermal comfort. On one occasion participants wore only shorts and shoes (Control) and on the 2 other occasions their head was either warmed (Warming) or cooled (Cooling)...
April 2016: Temperature: Multidisciplinary Biomedical Journal
https://www.readbyqxmd.com/read/27856712/rates-of-performance-loss-and-neuromuscular-activity-in-men-and-women-during-cycling-evidence-for-a-common-metabolic-basis-of-muscle-fatigue
#4
Christopher W Sundberg, Sandra K Hunter, Matthew W Bundle
The durations that muscular force and power outputs can be sustained until failure fall predictably on an exponential decline between an individual's 3-s burst maximum to the maximum performance they can sustain aerobically. The exponential time constants describing these rates of performance loss are similar across individuals suggesting that a common metabolically-based mechanism governs muscle fatigue; however, these conclusions come from studies mainly on men. To test whether the same physiological understanding can be applied to women, we compared the performance-duration relationships and neuromuscular activity between 7 men (23...
November 17, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27852810/multicomponent-cardiac-rehabilitation-in-patients-after-transcatheter-aortic-valve-implantation-predictors-of-functional-and-psychocognitive-recovery
#5
Sarah Eichler, Annett Salzwedel, Rona Reibis, Jörg Nothroff, Axel Harnath, Martin Schikora, Christian Butter, Karl Wegscheider, Heinz Völler
BACKGROUND: In the last decade, transcatheter aortic valve implantation has become a promising treatment modality for patients with aortic stenosis and a high surgical risk. Little is known about influencing factors of function and quality of life during multicomponent cardiac rehabilitation. METHODS: From October 2013 to July 2015, patients with elective transcatheter aortic valve implantation and a subsequent inpatient cardiac rehabilitation were enrolled in the prospective cohort multicentre study...
November 16, 2016: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/27808004/interval-training-elicits-higher-enjoyment-versus-moderate-exercise-in-persons-with-spinal-cord-injury
#6
Todd A Astorino, Jacob S Thum
BACKGROUND: High intensity interval training (HIIT) is a robust and time-efficient approach to improve multiple health indices including maximal oxygen uptake (VO2max). Despite the intense nature of HIIT, data in untrained adults report greater enjoyment of HIIT versus continuous exercise (CEX). However, this has yet to be investigated in persons with spinal cord injury (SCI). OBJECTIVE: To examine differences in enjoyment in response to CEX and HIIT in persons with SCI...
November 3, 2016: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/27804230/active-individuals-have-high-mitochondrial-content-and-oxidative-markers-in-their-abdominal-subcutaneous-adipose-tissue
#7
Maria F Pino, Stephanie A Parsons, Steven R Smith, Lauren M Sparks
OBJECTIVE: Exercise training (training) effects on white adipose tissue (WAT) thermogenic and oxidative capacities in humans are inconclusive. This study aimed to investigate whether an active lifestyle is characterized by thermogenic and/or oxidative transcriptional markers in human WAT. METHODS: In vivo maximal muscle ATP synthetic rates (ATPmax) were measured by (31) P-MRS, body composition by DXA, and peak oxygen uptake (VO2 peak) by cycle ergometry in active (n = 7) and sedentary (SED) individuals before and after 3 weeks of training (n = 9, SED only)...
November 2, 2016: Obesity
https://www.readbyqxmd.com/read/27793061/cardiorespiratory-kinetics-determined-by-pseudo-random-binary-sequences-comparisons-between-walking-and-cycling
#8
J Koschate, U Drescher, L Thieschäfer, O Heine, K Baum, U Hoffmann
This study aims to compare cardiorespiratory kinetics as a response to a standardised work rate protocol with pseudo-random binary sequences between cycling and walking in young healthy subjects. Muscular and pulmonary oxygen uptake (V̇O2) kinetics as well as heart rate kinetics were expected to be similar for walking and cycling. Cardiac data and V̇O2 of 23 healthy young subjects were measured in response to pseudo-random binary sequences. Kinetics were assessed applying time series analysis. Higher maxima of cross-correlation functions between work rate and the respective parameter indicate faster kinetics responses...
October 28, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27776081/acute-low-dose-caffeine-supplementation-increases-electromyographic-fatigue-threshold-in-healthy-men
#9
Jacob J Morse, Gramos Pallaska, Patrick R Pierce, Travis M Fields, Sujay S Galen, Moh H Malek
Morse, JJ, Pallaska, G, Pierce, PR, Fields, TM, Galen, SS, and Malek, MH. Acute low-dose caffeine supplementation increases electromyographic fatigue threshold in healthy men. J Strength Cond Res 30(11): 3236-3241, 2016-The purpose of this study is to determine whether consumption of a single low-dose caffeine drink will delay the onset of the electromyographic fatigue threshold (EMGFT) in the superficial quadriceps femoris muscles. We hypothesize that the EMGFT values for the caffeine condition will be significantly higher than the EMGFT values for the placebo condition...
November 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27774505/an-evaluation-of-the-significance-of-work-related-influence-factors-on-fitness-and-the-development-of-medical-and-orthopaedic-conditions-in-military-executives
#10
Christoph Schulze, Michael Becker, Susanne Finze, Christoph Holtherm, Jens Hinder, Andreas Lison
Occupational health promotion is an effective tool to improve the state of health of employees. As part of occupational health promotion in the German Bundeswehr, top-ranking military executives are offered a medical examination and training programme. Health-related data is collected as a basis for training and lifestyle counselling. This data was subjected to a retrospective evaluation in order to identify occupational risk factors and their correlation with cardiovascular resilience, trunk strength, and the development of orthopaedic and internal disorders...
2016: TheScientificWorldJournal
https://www.readbyqxmd.com/read/27766128/the-effect-of-skinfold-on-the-assessment-of-the-mean-power-frequency-at-the-fatigue-threshold
#11
Alyssandra N Baniqued, Jorge M Zuniga, Thomas C Strunc, Katie M Keenan, Agrini K Boken, Jeffrey J Anderson
The purpose of this study was to determine if the amount of subcutaneous tissue over the quadriceps affects the assessment of mean power frequency at the fatigue threshold (MPFFT). It was hypothesized that greater skinfold values will result in lower power outputs associated to the MPFFT. Fourteen adults (Mean ± SD age = 20.7 ± 0.99; body weight = 72.8 ± 12.6 kg) performed an incremental cycle ergometry test to exhaustion while surface electromyographic (EMG) signals were measured from the vastus lateralis...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27748503/neuromuscular-electrical-stimulation-for-muscle-weakness-in-adults-with-advanced-disease
#12
REVIEW
Sarah Jones, William D-C Man, Wei Gao, Irene J Higginson, Andrew Wilcock, Matthew Maddocks
BACKGROUND: This review is an update of a previously published review in the Cochrane Database of Systematic Reviews Issue 1, 2013 on Neuromuscular electrical stimulation for muscle weakness in adults with advanced disease.Patients with advanced progressive disease often experience muscle weakness, which can impact adversely on their ability to be independent and their quality of life. In those patients who are unable or unwilling to undertake whole-body exercise, neuromuscular electrical stimulation (NMES) may be an alternative treatment to enhance lower limb muscle strength...
October 17, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27743863/a-wearable-multisensing-patch-for-continuous-sweat-monitoring
#13
Salzitsa Anastasova, Blair Crewther, Pawel Bembnowicz, Vincenzo Curto, Henry Md Ip, Bruno Rosa, Guang-Zhong Yang
In sport, exercise and healthcare settings, there is a need for continuous, non-invasive monitoring of biomarkers to assess human performance, health and wellbeing. Here we report the development of a flexible microfluidic platform with fully integrated sensing for on-body testing of human sweat. The system can simultaneously and selectively measure metabolite (e.g. lactate) and electrolytes (e.g. pH, sodium) together with temperature sensing for internal calibration. The construction of the platform is designed such that continuous flow of sweat can pass through an array of flexible microneedle type of sensors (50µm diameter) incorporated in a microfluidic channel...
September 21, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27735783/abundance-in-proteins-expressed-after-functional-electrical-stimulation-cycling-or-arm-cycling-ergometry-training-in-persons-with-chronic-spinal-cord-injury
#14
Ashraf S Gorgey, Zachary A Graham, William A Bauman, Christopher Cardozo, David R Gater
STUDY DESIGN: Longitudinal design. OBJECTIVES: The study determined the effects of two forms of exercise training on the abundance of two proteins, (glucose transporter-4 [GLUT-4], adenosine monophosphate kinase [AMPK]) involved in glucose utilization and the transcriptional coactivator that regulates the genes involved in energy metabolism and mitochondrial biogenesis (peroxisome proliferator-activated receptor (PPAR) coactivator 1 alpha [PGC-1α]), in muscles in men with chronic motor-complete spinal cord injury (SCI)...
October 13, 2016: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/27676143/physical-exercise-in-patients-with-fabry-disease-a-pilot-study
#15
B Schmitz, L Thorwesten, M Lenders, T Duning, J Stypmann, E Brand, S-M Brand
The aim of this study was to assess the extent of exercise intolerance in Fabry disease (FD) patients and to report individual effects of physical exercise. Exercise capacity and strength of 14 patients (mean age 46 years, 6 females) were determined using cycle ergometry and isokinetic measurements. Patients performed a strength/circuit exercise training protocol for 12 months. The mean relative maximum performance of the group was low at baseline and increased by 12.1% (baseline: 1.9 [0.9-3.4] W·kg(-1)vs...
December 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27645220/epicardial-crt-p-and-s-icd-implantation-in-a-young-patient-with-persistent-left-superior-vena-cava
#16
Julia W Erath, Abdul Sami Sirat, Mate Vamos, Stefan H Hohnloser
Persistent left superior vena cava is known to be a challenging anatomic abnormality for transvenous cardiac device implantation. In the a case of a young man presenting with dilative cardiomyopathy with severely impaired left ventricular ejection fraction (LVEF) and second-degree atrioventricular block (AV block), cardiac resynchronization therapy (CRT) with defibrillator (CRT-D) implantation was indicated. A transvenous approach was attempted, but placement of the right ventricular lead was not successful due to anatomic abnormalities...
September 19, 2016: Herzschrittmachertherapie & Elektrophysiologie
https://www.readbyqxmd.com/read/27596222/abnormal-body-composition-cardiovascular-endurance-and-muscle-strength-in-pediatric-sle
#17
Sangeeta Sule, Kevin Fontaine
BACKGROUND: Children with SLE are known to have higher fat mass compared to their peers but there are no published data regarding exercise capacity as measured by cardiovascular endurance and muscle strength. In our pilot study of ten children with SLE, we sought to examine body composition, cardiovascular endurance, and isometric muscle strength. FINDINGS: Ten pediatric SLE patients were studied with a mean age of 15.5 years and 90 % female. Percent body fat above 30 %, the recommended normal level in adolescent females, were found in 89 % of female subjects and 40 % of all participants had lower than the recommended norms of muscle mass for their age/gender...
2016: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/27548795/acute-low-dose-caffeine-supplementation-increases-emgft-in-healthy-men
#18
Jacob J Morse, Gramos Pallaska, Patrick R Pierce, Travis M Fields, Sujay S Galen, Moh H Malek
The purpose of this study is to determine whether consumption of a single low dose caffeine drink will delay the onset of the electromyographic fatigue threshold (EMGFT) in the superficial quadriceps femoris muscles. We hypothesize that the EMGFT values for the caffeine condition will be significantly higher than the EMGFT values for the placebo condition. On separate occasions, ten physically active men performed incremental single-leg knee-extensor ergometry 1 h after caffeine (200 mg) or placebo consumption...
August 18, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27545012/tissue-doppler-imaging-during-exercise-stress-echocardiography-demonstrates-a-mechanism-for-impaired-exercise-performance-in-children-with-hypertrophic-cardiomyopathy
#19
Matthew Eric Ferguson, Ritu Sachdeva, Scott E Gillespie, Gemma Morrow, William Border
BACKGROUND: Hypertrophic cardiomyopathy (HCM) is associated with decreased exercise tolerance in children, presumably due to diastolic dysfunction. Modern imaging techniques to assess myocardial function during active exercise have not been applied to this population. We hypothesized that impaired contractile reserve, as assessed by tissue Doppler imaging (TDI) and strain, contributes to reduced exercise capacity in affected individuals. METHODS: Children (<18 years) with HCM and healthy age- and sex-matched controls were prospectively enrolled...
November 2016: Echocardiography
https://www.readbyqxmd.com/read/27530605/the-effects-of-a-home-based-arm-ergometry-exercise-programme-on-physical-fitness-fatigue-and-activity-in-polio-survivors-a-randomised-controlled-trial
#20
D Murray, O Hardiman, A Campion, R Vance, F Horgan, D Meldrum
OBJECTIVE: To investigate the effect of an eight-week home-based arm ergometry aerobic exercise programme on physical fitness, fatigue, activity and quality of life in Polio Survivors. DESIGN: An assessor blinded randomised controlled trial. SETTING: Home-based exercise. SUBJECTS: Fifty-five Polio survivors randomised to exercise or control groups. INTERVENTION: Home-based arm ergometry at an intensity of 50%-70% maximum heart rate, compared with usual physiotherapy care...
August 16, 2016: Clinical Rehabilitation
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