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Ergometry

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https://www.readbyqxmd.com/read/29680771/exercise-induced-left-bundle-branch-block-in-isotopic-exercise-test-findings-and-prognostic-value
#1
M V Gomez, B C Lorente Castro, P Jané, L García-Zoghby, A Martínez-Lorca, J A Pérez
INTRODUCTION: Exercise-induced left bundle branch block (EI-LBBB) is a rare circumstance of unknown significance. The purpose of this paper is to describe the scintigraphic features and the prognostic value of this finding. MATERIAL AND METHODS: We reviewed the features of 1,885 patients who had visited our department to undergo GATED-SPECT ergometry to diagnose ischaemic heart disease. Seven patients showed EI-LBBB throughout the exercise testing. Coronary angiography was performed in 4 of them...
April 18, 2018: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/29677565/comparison-of-three-modes-of-aerobic-exercise-combined-with-resistance-training-on-the-pain-and-function-of-patients-with-knee-osteoarthritis-a-randomized-controlled-trial
#2
Sanaz Kabiri, Farzin Halabchi, Hooman Angoorani, Saeed Yekaninejad
OBJECTIVES: To investigate the effects of three modes of aerobic exercise (lower limbs with and without weight bearing and upper limb) for knee osteoarthritis. DESIGN: Randomized controlled trial. SETTING: Sports medicine clinic. PARTICIPANTS: Seventy-eight patients with knee osteoarthritis were divided into 3 groups of resistance training combined with one of three programs of treadmill, cycle ergometer, or arm ergometer aerobic training...
April 7, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29671330/achieving-canadian-physical-activity-guidelines-is-associated-with-better-vascular-function-independent-of-aerobic-fitness-and-sedentary-time-in-older-adults
#3
Myles W O'Brien, Susan A Robinson, Ryan J Frayne, Said Mekary, Jonathon R Fowles, Derek S Kimmerly
Canadian physical activity guidelines recommend older adults accumulate 150 minutes of weekly moderate-vigorous physical activity (MVPA). Older adults who are insufficiently active may have reduced blood vessel health and an increased risk of cardiovascular disease. We tested this hypothesis in 11 older adults who did (7♀; 65±5 years; MVPA=239±81 minutes/week) and 10 older adults who did not (7♀; 68±9 years; MVPA=95±33 minutes/week) meet MVPA guidelines. Flow-mediated dilation (FMD) in the brachial (BA) and popliteal (POP) arteries, as well as, nitroglycerin-mediated dilation (NMD; endothelial-independent dilation) in the POP were assessed via ultrasonography...
April 19, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29665297/esmolol-acutely-alters-oxygen-supply-demand-balance-in-exercising-muscles-of-healthy-humans
#4
David N Proctor, J Carter Luck, Stephan R Maman, Urs A Leuenberger, Matthew D Muller
Beta-adrenoreceptor antagonists (β blockers) reduce systemic O2 delivery and blood pressure (BP) during exercise, but the subsequent effects on O2 extraction within the active limb muscles are unknown. In this study, we examined the effects of the fast-acting, β1 selective blocker esmolol on systemic hemodynamics and leg muscle O2 saturation (near infrared spectroscopy, NIRS) during submaximal leg ergometry. Our main hypothesis was that esmolol would augment exercise-induced reductions in leg muscle O2 saturation...
April 2018: Physiological Reports
https://www.readbyqxmd.com/read/29588313/reliability-and-physiological-interpretation-of-pulmonary-gas-exchange-by-circulatory-equivalents-in-chronic-heart-failure
#5
Chunting Tan, Harry B Rossiter, Janos Porszasz, T Scott Bowen, Klaus K Witte, William W Stringer, Richard Casaburi, James E Hansen
BACKGROUND: Peak ratios of pulmonary gas-exchange to ventilation during exercise (V˙O2/V˙E and V˙CO2/V˙E, termed "circulatory equivalents") are sensitive to heart failure (HF) severity, likely reflecting low and/or poorly distributed pulmonary perfusion. We tested whether peak V˙O2/V˙E and V˙CO2/V˙E would: (1) distinguish HF patients from controls; (2) be independent of incremental exercise protocol; and (3) correlate with lactate threshold (LT) and ventilatory compensation point (VCP), respectively...
March 27, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29587874/the-effects-of-different-forms-of-daily-exercise-on-metabolic-function-following-short-term-overfeeding-and-reduced-physical-activity-in-healthy-young-men-study-protocol-for-a-randomised-controlled-trial
#6
Jean-Philippe Walhin, Yung-Chih Chen, Aaron Hengist, James Bilzon, James A Betts, Dylan Thompson
BACKGROUND: Short-term overfeeding combined with reduced physical activity impairs metabolic function and alters the expression of key genes within adipose tissue. We have shown that daily vigorous-intensity running can prevent these changes independent of any net effect on energy imbalance. However, which type, intensity and/or duration of exercise best achieves these benefits remains to be ascertained. METHODS/DESIGN: Forty-eight healthy young men will be recruited and randomly allocated to one of four experimental conditions for 1 week: (1) to ingest 50% more energy than normal by over-consuming their habitual diet whilst simultaneously restricting their physical activity below 4000 steps day-1 (i...
March 27, 2018: Trials
https://www.readbyqxmd.com/read/29575588/exercise-on-transition-uncoupling-of-ventilatory-gas-exchange-and-cardiac-hemodynamic-kinetics-accompany-pulmonary-oxygen-stores-depletion-to-impact-exercise-intolerance-in-human-heart-failure
#7
Erik H Van Iterson, Joshua R Smith, Thomas P Olson
AIM: In contrast to knowledge that heart failure (HF) demonstrate peak exercise uncoupling across ventilation, gas-exchange, and cardiac hemodynamics, whether this dyssynchrony follows that at the exercise on-transition is unclear. This study tested whether exercise on-transition temporal lag for ventilation relative to gas-exchange and oxygen pulse (O2 pulse) couples with effects from abnormal pulmonary gaseous oxygen store (O2store ) contributions to V̇O2 to interdependently precipitate persistently elevated ventilatory demand and low oxidative metabolic capacity in HF...
March 25, 2018: Acta Physiologica
https://www.readbyqxmd.com/read/29572880/postoperative-ergometry-guided-programming-does-not-prevent-t-wave-oversensing-and-inappropriate-shocks-in-s-icd-patients
#8
Robert Larbig, Lukas J Motloch, Markus Bettin, Alicia Fischer, Gerrit Frommeyer, Florian Reinke, Andreas Loeher, Lars Eckardt, Julia Köbe
BACKGROUND: T-wave oversensing (TWOS) is a feared complication after subcutaneous ICD (S-ICD) implantation potentially leading to inappropriate shocks (IS) with tremendous impact on quality of life. HYPOTHESIS: Postoperative ergometry facilitates primary and secondary prevention of TWOS or other potential causes of IS and optimizes S-ICD programming. METHODS: We analyze the impact of ergometry guided-programming (EMGP) on primary and secondary prevention of TWOS/IS in S-ICD patients, we screened 146 patients implanted in our center (2010-2016) for the incidence of TWOS/IS during postoperative ergometry...
March 23, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29549005/influence-of-dietary-nitrate-supplementation-on-lung-function-and-exercise-gas-exchange-in-copd-patients
#9
Mehrdad Behnia, Courtney M Wheatley, Alberto Avolio, Bruce D Johnson
BACKGROUND: During exercise as pulmonary blood flow rises, pulmonary capillary blood volume increases and gas exchange surface area expands through distention and recruitment. We have previously demonstrated that pulmonary capillary recruitment is limited in COPD patients with poorer exercise tolerance. Hypoxia and endothelial dysfunction lead to pulmonary vascular dysregulation possibly in part related to nitric oxide related pathways. PURPOSE: To determine if increasing dietary nitrate might influence lung surface area for gas exchange and subsequently impact exercise performance...
March 13, 2018: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/29541131/oxygen-delivery-is-not-a-limiting-factor-during-post-exercise-recovery-in-healthy-young-adults
#10
Robert T Mankowski, Victor M Niemeijer, Jasper P Jansen, Lotte Spraakman, Henk J Stam, Stephan F E Praet
Purpose: It is still equivocal whether oxygen uptake recovery kinetics are limited by oxygen delivery and can be improved by supplementary oxygen. The present study aimed to investigate whether measurements of muscle and pulmonary oxygen uptake kinetics can be used to assess oxygen delivery limitations in healthy subjects. Methods: Sixteen healthy young adults performed three sub-maximal exercise tests (6 min at 40% Wmax ) under hypoxic (14%O2 ), normoxic (21%O2 ) and hyperoxic (35%O2 ) conditions on separate days in randomized order...
June 2017: Journal of Exercise Science and Fitness
https://www.readbyqxmd.com/read/29536150/association-between-aerobic-fitness-and-cerebrovascular-function-with-neurocognitive-functions-in-healthy-young-adults
#11
Jungyun Hwang, Kiyoung Kim, R Matthew Brothers, Darla M Castelli, F Gonzalez-Lima
Studies of the effects of physical activity on cognition suggest that aerobic fitness can improve cognitive abilities. However, the physiological mechanisms for the cognitive benefit of aerobic fitness are less well understood. We examined the association between aerobic fitness and cerebrovascular function with neurocognitive functions in healthy, young adults. Participants aged 18-29 years underwent measurements of cerebral vasomotor reactivity (CVMR) in response to rebreathing-induced hypercapnia, maximal oxygen uptake (VO2 max) during cycle ergometry to voluntary exhaustion, and simple- and complex-neurocognitive assessments at rest...
March 14, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29526185/the-importance-of-ergometry-was-underrated
#12
Christof Burgstahler, Andreas Nieß
No abstract text is available yet for this article.
February 23, 2018: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/29511919/cardiorespiratory-and-perceptual-responses-to-self-regulated-and-imposed-submaximal-arm-leg-ergometry
#13
Mathew Hill, Christopher Talbot, Michael Puddiford, Michael Price
PURPOSE: This study compared cardiorespiratory and perceptual responses to exercise using self-regulated and imposed power outputs distributed between the arms and legs. METHODS: Ten males (age 21.7 ± 3.4 years) initially undertook incremental arm-crank ergometry (ACE) and cycle ergometry (CYC) tests to volitional exhaustion to determine peak power output (Wpeak ). Two subsequent tests involved 20-min combined arm-leg ergometry (ALE) trials, using imposed and self-regulated protocols, both of which aimed to elicit an exercising heart rate of 160 beats min-1 ...
March 6, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29507824/similar-acute-physiological-responses-from-effort-and-duration-matched-leg-press-and-recumbent-cycling-tasks
#14
James Steele, Andrew Butler, Zoe Comerford, Jason Dyer, Nathan Lloyd, Joshua Ward, James Fisher, Paulo Gentil, Christopher Scott, Hayao Ozaki
The present study examined the effects of exercise utilising traditional resistance training (leg press) or 'cardio' exercise (recumbent cycle ergometry) modalities upon acute physiological responses. Nine healthy males underwent a within session randomised crossover design where they completed both the leg press and recumbent cycle ergometer conditions. Conditions were approximately matched for effort and duration (leg press: 4 × 12RM using a 2 s concentric and 3 s eccentric repetition duration controlled with a metronome, thus each set lasted  60 s; recumbent cycle ergometer: 4 × 60 s bouts using a resistance level permitting 80-100 rpm but culminating with being unable to sustain the minimum cadence for the final 5-10 s)...
2018: PeerJ
https://www.readbyqxmd.com/read/29506981/reference-values-for-peak-oxygen-uptake-cross-sectional-analysis-of-cycle-ergometry-based-cardiopulmonary-exercise-tests-of-10-090-adult-german-volunteers-from-the-prevention-first-registry
#15
Daniel Rapp, Jürgen Scharhag, Stefan Wagenpfeil, Johannes Scholl
OBJECTIVE: This study aims to construct quantile reference values for peak oxygen uptake (V̇O2peak ) measured by cycle ergometry-based incremental cardiopulmonary exercise tests. DESIGN: Cross-sectional study using quantile regressions to fit sex-specific and age-specific quantile curves. Exercise tests were conducted using cycle ergometry. Maximal effort in the exercise tests wass assumed when respiratory exchange ratio  ≥1.1 or lactate ≥8 mmol/L or maximal heart rate ≥90% of the age-predicted maximal heart rate...
March 5, 2018: BMJ Open
https://www.readbyqxmd.com/read/29492711/a-benefit-of-being-heavier-is-being-strong-a-cross-sectional-study-in-young-adults
#16
Gill A Ten Hoor, Guy Plasqui, Annemie M W J Schols, Gerjo Kok
BACKGROUND: In this study, the main hypothesis is that heavier people enjoy strength exercises more than normal-weight people, mediated by fat-free mass and muscle strength. Further, it is hypothesized that heavier people are better in strength exercises and enjoy strength exercises more compared to aerobic exercises. METHODS: In a cross-sectional study, height, weight, body composition (i.e., fat mass and fat-free mass by underwater weighing), muscle strength (i...
March 1, 2018: Sports Medicine—Open
https://www.readbyqxmd.com/read/29481448/reduced-electromyographic-fatigue-threshold-after-performing-a-cognitive-fatiguing-task
#17
Justine R Ferris, Mary A Tomlinson, Tayler N Ward, Marie E Pepin, Moh H Malek
Cognitive fatigue tasks performed prior to exercise may reduce exercise capacity. The electromyographic fatigue threshold (EMGFT) is the highest exercise intensity that can be maintained without significant increase in the EMG amplitude versus time relationship. To date, no studies have examined the effect of cognitive fatigue on the estimation of the EMGFT. The purpose of this study, therefore, was to determine whether or not cognitive fatigue prior to performing exercise reduces the estimated EMGFT. Eight healthy college-aged men were recruited from a university student population and visited the laboratory on multiple occasions...
February 22, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29465495/exercise-rehabilitation-for-peripheral-artery-disease-a-review
#18
Mary M McDermott
PURPOSE: To summarize evidence regarding exercise therapy for people with lower extremity peripheral artery disease (PAD). METHODS: Literature was reviewed regarding optimal strategies for delivering exercise interventions for people with PAD. Randomized trial evidence and recent studies were emphasized. RESULTS: Randomized clinical trial evidence consistently demonstrates that supervised treadmill exercise improves treadmill walking performance in people with PAD...
March 2018: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/29444105/accuracy-and-precision-of-consumer-level-activity-monitors-for-stroke-detection-during-wheelchair-propulsion-and-arm-ergometry
#19
Jochen Kressler, Joshua Koeplin-Day, Benedikt Muendle, Brice Rosby, Elizabeth Santo, Antoinette Domingo
The purpose of this study was to evaluate whether consumer-level activity trackers can estimate wheelchair strokes and arm ergometer revolutions. Thirty able-bodied participants wore three consumer-level activity trackers (Garmin VivoFit, FitBit Flex, and Jawbone UP24) on the wrist. Participants propelled a wheelchair at fixed frequencies (30, 45 and 60 strokes per minute (spm)) three minutes each and at pre-determined varied frequencies, (30-80 spm) for two minutes. Participants also freely wheeled through an obstacle course...
2018: PloS One
https://www.readbyqxmd.com/read/29439648/effect-of-12-weeks-of-once-daily-tiotropium-olodaterol-on-exercise-endurance-during-constant-work-rate-cycling-and-endurance-shuttle-walking-in-chronic-obstructive-pulmonary-disease
#20
François Maltais, Denis O'Donnell, Juan Bautista Gáldiz Iturri, Anne-Marie Kirsten, Dave Singh, Alan Hamilton, Kay Tetzlaff, Yihua Zhao, Richard Casaburi
BACKGROUND: The TORRACTO® study evaluated the effects of tiotropium/olodaterol versus placebo on endurance time during constant work-rate cycling and constant speed shuttle walking in patients with chronic obstructive pulmonary disease (COPD) after 12 weeks of treatment. METHODS: The effects of once-daily tiotropium/olodaterol (2.5/5 and 5/5 μg) on endurance time during constant work-rate cycle ergometry (CWRCE) after 6 and 12 weeks of treatment were compared with placebo in patients with COPD in a randomized, double-blind, placebo-controlled, parallel-group clinical trial...
January 2018: Therapeutic Advances in Respiratory Disease
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