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Ergometry

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https://www.readbyqxmd.com/read/28516252/chronic-eccentric-arm-cycling-improves-maximum-upper-body-strength-and-power
#1
Steven J Elmer, Dakota J Anderson, Travis R Wakeham, Matthew A Kilgas, John J Durocher, Stan L Lindstedt, Paul C LaStayo
INTRODUCTION: Eccentric leg cycling (cycle ergometry adapted to impose muscle lengthening contractions) offers an effective exercise for restoring lower-body muscular function, maintaining health, and improving performance in clinical and athletic populations. PURPOSE: We extended this model to the upper body and evaluated the effectiveness of a 7-week eccentric arm cycling (ECCarm) intervention to improve upper-body muscular function. We also explored whether ECCarm would alter arterial function...
May 17, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28507191/lowering-metabolic-rate-mitigates-muscle-atrophy-in-western-fence-lizards
#2
J Balaban, E Azizi
Extended periods of skeletal muscle disuse can cause a significant loss of contractile proteins, which compromises the ability to generate force, mechanical work or power, thus compromising locomotor performance. Several hibernating organisms can resist muscle atrophy despite months of inactivity. This resistance has been attributed to a reduction in body temperature and metabolic rate and activation of physiological pathways that counteract pathways of protein degradation. However, in these systems such strategies are not mutually exclusive and the effects of these mechanisms can be difficult to separate...
May 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28499626/carbon-dioxide-exposure-resulting-from-hood-protective-equipment-used-in-joint-arthroplasty-surgery
#3
Suhani Patel, Janelle M Fine, Michael J Lim, Steven N Copp, Adam S Rosen, John B West, G Kim Prisk
BACKGROUND: To protect both the surgeon and patient during procedures, hooded protection shields are used during joint arthroplasty procedures. Headache, malaise, and dizziness, consistent with increased carbon dioxide (CO2) exposure, have been anecdotally reported by surgeons using hoods. We hypothesized that increased CO2 concentrations were causing reported symptoms. METHODS: Six healthy subjects (4 men) donned hooded protection, fan at the highest setting. Arm cycle ergometry at workloads of 12 and 25 watts (W) simulated workloads encountered during arthroplasty...
March 31, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28475643/a-combination-of-routine-blood-analytes-predicts-fitness-decrement-in-elderly-endurance-athletes
#4
Helmuth Haslacher, Franz Ratzinger, Thomas Perkmann, Delgerdalai Batmyagmar, Sonja Nistler, Thomas M Scherzer, Elisabeth Ponocny-Seliger, Alexander Pilger, Marlene Gerner, Vanessa Scheichenberger, Michael Kundi, Georg Endler, Oswald F Wagner, Robert Winker
Endurance sports are enjoying greater popularity, particularly among new target groups such as the elderly. Predictors of future physical capacities providing a basis for training adaptations are in high demand. We therefore aimed to estimate the future physical performance of elderly marathoners (runners/bicyclists) using a set of easily accessible standard laboratory parameters. To this end, 47 elderly marathon athletes underwent physical examinations including bicycle ergometry and a blood draw at baseline and after a three-year follow-up period...
2017: PloS One
https://www.readbyqxmd.com/read/28442333/effects-of-auditory-stimuli-on-electrical-activity-in-the-brain-during-cycle-ergometry
#5
Marcelo Bigliassi, Costas I Karageorghis, Michael J Wright, Guido Orgs, Alexander V Nowicky
The present study sought to further understanding of the brain mechanisms that underlie the effects of music on perceptual, affective, and visceral responses during whole-body modes of exercise. Eighteen participants were administered light-to-moderate intensity bouts of cycle ergometer exercise. Each exercise bout was of 12-min duration (warm-up [3min], exercise [6min], and warm-down [3min]). Portable techniques were used to monitor the electrical activity in the brain, heart, and muscle during the administration of three conditions: music, audiobook, and control...
April 23, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28426509/log-transformed-emg-amplitude-power-output-relationship-single-leg-knee-extensor-versus-single-leg-cycle-ergometry
#6
Eric B Noble, Joshua M Pilarski, Harshal K Vora, Jorge M Zuniga, Moh H Malek
Comparing and contrasting motor unit recruitment and activation for the same muscles for multiple versus single-joint exercise may provide a better understanding of neuromuscular fatigue. The purpose of this study, therefore, is to compare the slope and y-intercept terms for the three superficial quadriceps femoris (vastus lateralis, rectus femoris, and vastus medialis) muscles derived from the log-transformed EMG amplitude-power output relationship between the single-leg knee-extensor ergometry and the single-leg cycle ergometry...
April 15, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28424359/effects-of-combined-tiotropium-olodaterol-on-inspiratory-capacity-and-exercise-endurance-in-copd
#7
Denis E O'Donnell, Richard Casaburi, Peter Frith, Anne Kirsten, Dorothy De Sousa, Alan Hamilton, Wenqiong Xue, François Maltais
Two replicate, double-blind, 6-week, incomplete-crossover studies (MORACTO 1 and 2) assessed the effects of tiotropium/olodaterol on inspiratory capacity and exercise endurance time in patients with moderate to severe chronic obstructive pulmonary disease.For each patient, four of five treatments were administered once daily for 6 weeks, with a 21-day washout between treatments: tiotropium/olodaterol 2.5/5 µg or 5/5 µg, tiotropium 5 µg, olodaterol 5 µg or placebo, all via the Respimat inhaler...
April 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28393459/lunhab-interactive-effects-of-a-10-day-sustained-exposure-to-hypoxia-and-bedrest-on-aerobic-exercise-capacity-in-male-lowlanders
#8
Michail E Keramidas, Igor B Mekjavic, Ola Eiken
The study examined the interactive effects of a 10-day exposure to hypoxia and bedrest on the whole body peak oxygen uptake (V˙O2 peak ) during maximal exercise, and on skeletal-muscle and cerebral oxygenation during submaximal exercise. Nine males underwent three 10-day confinements, in a Latin-square order: (i) a normoxic bedrest [NBR; partial pressure of inspired O2 (PI O2 ) = 134.2 ± 0.7 mmHg], (ii) a hypoxic bedrest (HBR; PI O2  = 102.9 ± 0.1 mmHg at day 1, 91.5 ± 1.2 mmHg at days 3-10), and (iii) a hypoxic ambulation (HAMB; PI O2 as in HBR)...
April 9, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28390058/acute-effects-of-exercise-posture-on-executive-function-in-transient-ischemic-attack-patients
#9
James Faulkner, Lee Stoner, Rebecca Grigg, Simon Fryer, Keeron Stone, Danielle Lambrick
In patients with stroke or transient ischemic attacks (TIA), a decline in executive function may limit an individual's ability to process motor tasks and relearn motor skills. The purpose of this study was to assess the acute effect of exercise posture (seated vs. supine cycle ergometry) on executive function and prefrontal cortex perfusion in patients with TIA. Eleven TIA patients (65 ± 10 years) and 15 age-matched, healthy controls (HC; 62 ± 7 years) completed two exercise tests to maximal capacity (one seated, one supine) and two 30-min submaximal exercise tests (one seated, one supine)...
April 8, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28386239/skeletal-muscle-myomir-are-differentially-expressed-by-endurance-exercise-mode-and-combined-essential-amino-acid-and-carbohydrate-supplementation
#10
Lee M Margolis, Holly L McClung, Nancy E Murphy, Christopher T Carrigan, Stefan M Pasiakos
Skeletal muscle microRNAs (myomiR) expression is modulated by exercise, however, the influence of endurance exercise mode, combined with essential amino acid and carbohydrate (EAA+CHO) supplementation are not well defined. This study determined the effects of weighted versus non-weighted endurance exercise, with or without EAA+CHO ingestion on myomiR expression and their association with muscle protein synthesis (MPS). Twenty five adults performed 90 min of metabolically-matched (2.2 VO2 L·m(-1)) load carriage (LC; performed on a treadmill wearing a vest equal to 30% of individual body mass) or cycle ergometry (CE) exercise, during which EAA+CHO (10 g EAA and 46 g CHO) or non-nutritive control (CON) drinks were consumed...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28381454/erythropoiesis-with-endurance-training-dynamics-and-mechanisms
#11
David Montero, Andreas Breenfeldt-Andersen, Laura Oberholzer, Thomas Haider, Jens Peter Goetze, Anne-Kristine Meinild-Lundby, Carsten Lundby
The purpose of the present study was to characterize the progression of red blood cell volume (RBCV) expansion and potential volumetric and endocrine regulators of erythropoiesis during endurance training (ET). Nine healthy untrained volunteers (age=27±4 years) underwent supervised ET consisting of 3-4 × 60 min cycle ergometry sessions per week for 8 weeks. Plasma volume (PV), RBCV and overnight fasting hematological markers were determined prior to and at weeks 2, 4 and 8 of ET. In addition, plasma erythropoietin (EPO), cortisol, copeptin and pro-atrial natriuretic peptide concentrations were measured during a 3-hour morning period at baseline and post-exercise at weeks 1 and 8...
April 5, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28379976/new-approach-for-visualization-of-relationships-between-rr-and-jt-intervals
#12
Pranas Ziaukas, Abdullah Alabdulgader, Alfonsas Vainoras, Zenonas Navickas, Minvydas Ragulskis
This paper presents the concept of perfect matrices of Lagrange differences which are used to analyze relationships between RR and JT intervals during the bicycle ergometry exercise. The concept of the perfect matrix of Lagrange differences, its parameters, the construction of the load function and the corresponding optimization problem, the introduction of internal and external smoothing, embedding of the scalar parameter time series into the phase plane-all these computational techniques allow visualization of complex dynamical processes taking place in the cardiovascular system during the load and the recovery processes...
2017: PloS One
https://www.readbyqxmd.com/read/28379571/safety-and-feasibility-of-a-protocolized-approach-to-in-bed-cycling-exercise-in-the-intensive-care-unit-quality-improvement-project
#13
Ibtehal Kimawi, Bryanna Lamberjack, Archana Nelliot, Amy Lee Toonstra, Jennifer Zanni, Minxuan Huang, Earl Mantheiy, Michelle E Kho, Dale M Needham
Background: : In-bed, supine cycle ergometry as a part of early rehabilitation in the intensive care unit (ICU) appears to be safe, feasible, and beneficial, but no standardized protocol exists. A standardized protocol may help guide use of cycle ergometry in the ICU. Objective: We investigated whether a standardized protocol for in-bed cycling is safe and feasible, and results in cycling for a longer duration and achieves a higher resistance. Design: A quality improvement (QI) project was conducted...
March 31, 2017: Physical Therapy
https://www.readbyqxmd.com/read/28341033/stress-echocardiographic-evaluation-for-d-transposition-of-the-great-arteries-after-atrial-redirection-unmasking-early-signs-of-myocardial-dysfunction-and-baffle-stenosis
#14
Merav Dvir-Orgad, Meera Anand, Astrid M De Souza, Mary T Zadorsky, Marla C Kiess, James E Potts, George G S Sandor
BACKGROUND: The authors used semisupine cycle ergometry stress echocardiography to assess cardiac function and unmask baffle stenosis in patients with d-transposition of the great arteries after atrial redirection surgery. METHODS: This was a retrospective review of semisupine cycle ergometry stress echocardiography performed in 53 patients (64% male; mean age, 24.0 years; 90% Mustard procedure) and 56 healthy control subjects. Incremental exercise to volitional fatigue was performed...
January 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28283324/early-mobilization-why-what-for-and-how
#15
A R Miranda Rocha, B P Martinez, V Z Maldaner da Silva, L A Forgiarini Junior
Early mobilization strategies in the intensive care unit may result in the prevention and reduction of polyneuromyopathy in the critical patient, improved quality of life, shortened ICU and hospital stay, and lesser mortality during hospitalization. However, it is well known that factors such as the protocol used, the population included in the studies, the timing of the strategy, the severity of the patients and different barriers directly influence the outcomes. This study examines the main protocols described in the literature and their associated results...
March 7, 2017: Medicina Intensiva
https://www.readbyqxmd.com/read/28255448/effects-of-different-early-rehabilitation-techniques-on-haemodynamic-and-metabolic-parameters-in-sedated-patients-protocol-for-a-randomised-single-bind-cross-over-trial
#16
Clément Medrinal, Yann Combret, Guillaume Prieur, Aurora Robledo Quesada, Tristan Bonnevie, Francis Edouard Gravier, Éric Frenoy, Olivier Contal, Bouchra Lamia
INTRODUCTION: Early rehabilitation has become widespread practice for patients in intensive care; however, the prevalence of intensive care unit-acquired weakness remains high and the majority of physiotherapy is carried out in bed. Several inbed rehabilitation methods exist, but we hypothesise that techniques that provoke muscle contractions are more effective than passive techniques. METHODS: A randomised, controlled cross-over study will be carried out to evaluate and compare the effectiveness of early rehabilitation techniques on cardiac output (CO) in sedated patients in intensive care...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/28243999/physiological-effects-of-early-incremental-mobilization-of-a-patient-with-acute-intracerebral-and-intraventricular-hemorrhage-requiring-dual-external-ventricular-drainage
#17
Sowmya Kumble, Elizabeth K Zink, Mackenzie Burch, Sandra Deluzio, Robert D Stevens, Mona N Bahouth
BACKGROUND: Recent trials have challenged the notion that very early mobility benefits patients with acute stroke. It is unclear how cerebral autoregulatory impairments, prevalent in this population, could be affected by mobilization. The safety of mobilizing patients who have external ventricular drainage (EVD) devices for cerebrospinal fluid diversion and intracranial pressure (ICP) monitoring is another concern due to risk of device dislodgment and potential elevation in ICP. We report hemodynamic and ICP responses during progressive, device-assisted mobility interventions performed in a critically ill patient with intracerebral hemorrhage (ICH) requiring two EVDs...
February 27, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28193264/the-clinical-picture-of-cachexia-a-mosaic-of-different-parameters-experience-of-503-patients
#18
S Schwarz, O Prokopchuk, K Esefeld, S Gröschel, J Bachmann, S Lorenzen, H Friess, M Halle, M E Martignoni
BACKGROUND: Despite our growing knowledge about the pathomechanisms of cancer cachexia, a whole clinical picture of the cachectic patient is still missing. Our objective was to evaluate the clinical characteristics in cancer patients with and without cachexia to get the whole picture of a cachectic patient. METHODS: Cancer patients of the University Clinic "Klinikum rechts der Isar" with gastrointestinal, gynecological, hematopoietic, lung and some other tumors were offered the possibility to take part in the treatment concept including a nutrition intervention and an individual training program according to their capability...
February 14, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28188010/the-1-min-sit-to-stand-test-in-cystic-fibrosis-insights-into-cardiorespiratory-responses
#19
Thomas Radtke, Helge Hebestreit, Milo A Puhan, Susi Kriemler
BACKGROUND: We aimed to characterize the cardiopulmonary response during a 1-min sit-to-stand (STS) test and compare peak exercise cardiorespiratory variables to a maximal cardiopulmonary exercise test (CPET) in cystic fibrosis (CF). We further aimed to assess the validity of the STS power index (PowerSTS) as a measure of exercise capacity. METHODS: Fifteen adult CF patients performed spirometry, CPET and the 1-min STS test with respiratory gas analysis. RESULTS: Peak-exercise cardiorespiratory variables during the 1-min STS test correlated strongly (r=0...
February 7, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28166120/pulmonary-artery-wedge-pressure-relative-to-exercise-workrate-in-older-men-and-women
#20
Sam Esfandiari, Stephen P Wright, Jack M Goodman, Zion Sasson, Susanna Mak
PURPOSE: An augmented pulmonary artery wedge pressure (PAWP) response may explain exercise intolerance in some humans. However, routine use of exercise hemodynamic testing is limited by a lack of data from normal older men and women. Our objective was to evaluate the exercise PAWP response and the potential for sexual dimorphism in healthy, non-dyspneic older adults. METHODS: Thirty-six healthy volunteers [18 men (54±7 years)/18 women (58±6 years)] were studied at rest (Control) and during two stages of semi-upright cycle-ergometry, at heart rates of 100 bpm (Light Exercise) and 120 bpm (Moderate Exercise)...
February 4, 2017: Medicine and Science in Sports and Exercise
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