keyword
MENU ▼
Read by QxMD icon Read
search

oxygen saturation exercise

keyword
https://www.readbyqxmd.com/read/29411535/near-infrared-spectroscopy-detects-age-related-differences-in-skeletal-muscle-oxidative-function-promising-implications-for-geroscience
#1
Susie Chung, Ryan Rosenberry, Terence E Ryan, Madison Munson, Thomas Dombrowsky, Suwon Park, Aida Nasirian, Mark J Haykowsky, Michael D Nelson
Age is the greatest risk factor for chronic disease and is associated with a marked decline in functional capacity and quality of life. A key factor contributing to loss of function in older adults is the decline in skeletal muscle function. While the exact mechanism(s) remains incompletely understood, age-related mitochondrial dysfunction is thought to play a major role. To explore this question further, we studied 15 independently living seniors (age: 72 ± 5 years; m/f: 4/11; BMI: 27.6 ± 5.9) and 17 young volunteers (age: 25 ± 4 years; m/f: 8/9; BMI: 24...
February 2018: Physiological Reports
https://www.readbyqxmd.com/read/29401114/efficacy-of-a-structured-exercise-program-for-improving-functional-capacity-and-quality-of-life-in-patients-with-stage-3-and-4-sarcoidosis-a-randomized-controlled-trial
#2
Ilknur Naz, Sevgi Ozalevli, Serir Ozkan, Hulya Sahin
PURPOSE: This study investigated the effects of an exercise program on functional capacity and quality of life in patients with stage 3 and stage 4 sarcoidosis. METHODS: Eighteen patients with stage 3 and 4 sarcoidosis were recruited; 9 received 12 wk of supervised exercise training and 9 received usual care. Patients underwent the following evaluations at baseline and follow-up: 6-min walk test, maximal inspiratory and expiratory pressure tests, back and leg dynamometer test, modified Medical Research Council Dyspnea Scale, Fatigue Severity Scale, St George Respiratory Questionnaire, Short Form-36 Quality of Life Questionnaire, Hospital Anxiety and Depression Questionnaire, body plethysmography, carbon monoxide diffusing capacity test, and blood gas analysis...
February 2, 2018: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/29389691/the-effect-of-ischemic-preconditioning-on-maximal-swimming-performance
#3
N Williams, M Russell, C J Cook, L P Kilduff
The effect of ischemic preconditioning (IPC) on swimming performance was examined. Using a randomized, crossover design, National-and International-level swimmers (n=20; 14 males, 6 females) participated in three trials (Con, IPC-2h, IPC-24h). Lower-body IPC (4 x 5 min bi-lateral blood-flow restriction at 160-228 mmHg, and 5 min reperfusion) was used 2- (IPC-2h) or 24-h (IPC-24h) before a self-selected (100 m, n=15; 200 m, n=5) swimming time-trial (TT). The Con trial used a sham intervention (15 mmHg) 2h prior to exercise...
January 30, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29372395/impaired-skeletal-muscle-oxygenation-following-allogeneic-hematopoietic-stem-cell-transplantation-is-associated-with-exercise-capacity
#4
Tatsushi Wakasugi, Shinichiro Morishita, Katsuji Kaida, Yusuke Itani, Norihiko Kodama, Kazuhiro Ikegame, Hiroyasu Ogawa, Kazuhisa Domen
INTRODUCTION: Impaired skeletal muscle oxygenation potentially contributes to reduced exercise capacity in allogeneic hematopoietic stem cell transplantation (allo-HSCT) patients during early recovery and may explain altered hemoglobin responses to exercise following allo-HSCT. We investigated whether skeletal muscle oxygenation parameters and hemoglobin parameters in the tibialis anterior decreased following allo-HSCT, and whether these results were associated with declines in exercise capacity...
January 25, 2018: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/29369955/reliability-of-near-infrared-spectroscopy-for-measuring-intermittent-handgrip-contractions-in-sport-climbers
#5
Jiří Baláš, Jan Kodejška, Dominika Krupková, Johan Hannsmann, Simon Fryer
Baláš, J, Kodejška, J, Krupková, D, Hannsmann, J, and Fryer, S. Reliability of near-infrared spectroscopy for measuring intermittent handgrip contractions in sport climbers. J Strength Cond Res 32(2): 494-501, 2018-The use of near-infrared spectroscopy (NIRS) to investigate muscle oxygenation changes during physical tasks such as rock climbing has rapidly increased within recent years; yet, there is no known measure of reliability. The current study aimed to determine intersession reliability and minimal detectable change (MDC) of continuous wave NIRS parameters during intermittent handgrip contractions in rock climbers...
February 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29369000/cardiorespiratory-repercussions-according-to-the-abdominal-circumference-measurement-of-men-with-obstructive-respiratory-disorder-submitted-to-respiratory-physiotherapy
#6
Bruno Martinelli, Valéria Amorim Pires Di Lorenzo, Robison José Quitério, Alexandre Ricardo Pepe Ambrozin, Eduardo Aguilar Arca, Maurício Jamami
PURPOSE: To examine the effect of respiratory physiotherapy among men with obstructive respiratory disorder, in relation to abdominal circumference (AC). METHODS: Quasi-experimental study including 26 men split into two groups according to AC(cm): 1) < 102 (ACrisk-free); and 2) ≥ 102 (ACrisk). Heart rate variability (HRV), diastolic blood pressure (DBP), oxygen saturation (SpO2), FEV1/FVC, slow vital capacity (SVC), inspiratory capacity (IC), maximal inspiratory pressure (PImax), thoracoabdominal amplitude (AI) were measured: before (M1); 5 min after the physiotherapy (i...
January 25, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29368457/performance-comparison-of-the-moxy-and-portamon-near-infrared-spectroscopy-muscle-oximeters-at-rest-and-during-exercise
#7
Chris J McManus, Jay Collison, Chris E Cooper
The purpose of the study was to compare muscle oxygenation as measured by two portable, wireless near-infrared spectroscopy (NIRS) devices under resting and dynamic conditions. A recently developed low-cost NIRS device (MOXY) was compared against an established PortaMon system that makes use of the spatially resolved spectroscopy algorithm. The influence of increasing external pressure on tissue oxygen saturation index (TSI) indicated that both devices are stable between 2 and 20 mmHg. However, above this pressure, MOXY reports declining TSI values...
January 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29368399/do-interindividual-differences-in-cardiac-output-during-submaximal-exercise-explain-differences-in-exercising-muscle-oxygenation-and-ratings-of-perceived-exertion
#8
Robert F Bentley, Joshua H Jones, Daniel M Hirai, Joel T Zelt, Matthew D Giles, James P Raleigh, Joe Quadrilatero, Brendon J Gurd, J Alberto Neder, Michael E Tschakovsky
Considerable interindividual differences in the Q˙-V˙O2 relationship during exercise have been documented but implications for submaximal exercise tolerance have not been considered. We tested the hypothesis that these interindividual differences were associated with differences in exercising muscle deoxygenation and ratings of perceived exertion (RPE) across a range of submaximal exercise intensities. A total of 31 (21 ± 3 years) healthy recreationally active males performed an incremental exercise test to exhaustion 24 h following a resting muscle biopsy...
January 2018: Physiological Reports
https://www.readbyqxmd.com/read/29357515/the-noninvasive-simultaneous-measurement-of-tissue-oxygenation-and-microvascular-hemodynamics-during-incremental-handgrip-exercise
#9
Shane M Hammer, Andrew M Alexander, Kaylin D Didier, Joshua R Smith, Jacob Troy Caldwell, Shelbi L Sutterfield, Carl J Ade, Thomas J Barstow
Limb blood flow increases linearly with exercise intensity; however, invasive measurements of muscle microvascular blood flow during incremental exercise have demonstrated submaximal plateaus. We tested the hypotheses that 1) brachial artery blood flow (Q̇BA) would increase with increasing exercise intensity until task failure, 2) blood flow index of the flexor digitorum superficialis (BFIFDS) measured noninvasively via diffuse correlation spectroscopy (DCS) would plateau at a submaximal work rate, and 3) muscle oxygenation characteristics (total-[heme], deoxy-[heme], and % saturation) measured noninvasively with near-infrared spectroscopy (NIRS) would demonstrate a plateau at a similar work rate as BFIFDS...
December 14, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29342097/time-domain-near-infrared-spectroscopy-device-for-monitoring-muscle-oxidative-metabolism-custom-probe-and-in-vivo-applications
#10
Rebecca Re, Ileana Pirovano, Davide Contini, Lorenzo Spinelli, Alessandro Torricelli
Measurement of muscle oxidative metabolism is of interest for monitoring the training status in athletes and the rehabilitation process in patients. Time domain near infrared spectroscopy (TD NIRS) is an optical technique that allows the non-invasive measurement of the hemodynamic parameters in muscular tissue: concentrations of oxy- and deoxy-hemoglobin, total hemoglobin content, and tissue oxygen saturation. In this paper, we present a novel TD NIRS medical device for muscle oxidative metabolism. A custom-printed 3D probe, able to host optical elements for signal acquisition from muscle, was develop for TD NIRS in vivo measurements...
January 17, 2018: Sensors
https://www.readbyqxmd.com/read/29301460/inert-gas-rebreathing-helpful-tool-in-the-management-of-left-ventricular-assist-device-patients
#11
Nils Reiss, Thomas Schmidt, Stephanie Mommertz, Christina Feldmann, Jan Dieter Schmitto
In patients with left ventricular assist devices (LVAD), exercise capacity is a decisive factor regarding the quality of life. When evaluating exercise capacity, precise information about the total cardiac output generated is crucial. To date, complex measurements using a right-heart catheter were necessary in order to determine total cardiac output. The inert gas rebreathing method facilitates non-invasive, direct and valid measurement of total cardiac output as well as associated parameters, like the difference in arteriovenous oxygen saturation, both at rest and during exercise...
January 1, 2018: Perfusion
https://www.readbyqxmd.com/read/29289866/validation-of-6%C3%A2-min-step-test-and-4-m-gait-speed-in-children-a-randomized-cross-over-study
#12
Gregory Reychler, Nicolas Audag, Sophie Dewulf, Natalia Morales Mestre, Gilles Caty
INTRODUCTION: Even if 6-min walking test (6MWT) is the criterion standard for functional exercise performance evaluation, new field tests are required as practical alternative. This study aims to establish the validity of the 6-min step test (6MST) and the 4-m gait speed (4MGS) in children. METHOD: It is a randomized cross-over trial. Sixty one healthy children from 6 to 12 years were recruited. 6MWT, 6MST and 4MGS were randomly performed on three consecutive days...
December 24, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29281194/the-dewey-monitor-pulse-oximetry-can-independently-detect-hypoxia-in-a-rebreather-diver
#13
Rachel M Lance, Michael J Natoli, Sophia A S Dunworth, John J Freiberger, Richard E Moon
Rebreather diving has one of the highest fatality rates per man hour of any diving activity in the world. The leading cause of death is hypoxia, typically from equipment or procedural failures. Hypoxia causes very few symptoms prior to causing loss of consciousness. Additionally, since the electronics responsible for controlling oxygen levels in rebreathers often control their alarm systems, frequently divers do not receive any external warnings. This study investigated the use of a forehead pulse oximeter as an independent warning device in the event of rebreather failure...
November 2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/29275453/inhaled-treprostinil-in-pulmonary-hypertension-associated-with-lung-disease
#14
Mariana Faria-Urbina, Rudolf K F Oliveira, Manyoo Agarwal, Aaron B Waxman
PURPOSE: Pulmonary hypertension (PH) in the setting of parenchymal lung disease adversely affects quality of life and survival. However, PH-specific drugs may result in ventilation/perfusion imbalance and currently, there are no approved PH treatments for this patient population. In the present retrospective study, data from 22 patients with PH associated with lung disease treated with inhaled treprostinil (iTre) and followed up clinically for at least 3 months are presented. METHODS: PH was defined by resting right heart catheterization as a mean pulmonary artery pressure (mPAP) ≥ 35 mmHg, or mPAP ≥ 25 mmHg associated with pulmonary vascular resistance ≥ 4 Woods Units...
December 23, 2017: Lung
https://www.readbyqxmd.com/read/29259560/the-energetics-during-the-world-s-most-challenging-mountain-ultra-marathon-a-case-study-at-the-tor-des-geants%C3%A2
#15
Aldo Savoldelli, Alessandro Fornasiero, Pietro Trabucchi, Eloisa Limonta, Antonio La Torre, Francis Degache, Barbara Pellegrini, Grégoire P Millet, Gianluca Vernillo, Federico Schena
Purpose: To provide insights into the energy requirements as well as the physiological adaptations of an experienced 50-year-old ultra-marathon male athlete during the world's most challenging mountain ultra-marathon (MUM). Methods: The international race supporting the study was the Tor des Geants®, characterized by 330 km with +24,000 m D+ to be covered within 150 h. Before the MUM, we assessed the peak oxygen uptake ([Formula: see text]) by means of an incremental graded running test. During the MUM we monitored six ascents (once per race day) with a portable gas analyzer, a GPS and a finger pulse oximeter...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29233198/clinical-efficacy-and-safety-of-switch-from-bosentan-to-macitentan-in-children-and-young-adults-with-pulmonary-arterial-hypertension
#16
Ebru Aypar, Dursun Alehan, Tevfik Karagöz, Hayrettin Hakan Aykan, İlker Ertugrul
BACKGROUND: Macitentan is an orally active, potent, dual endothelin receptor antagonist and is the only registered treatment for pulmonary arterial hypertension that significantly reduced morbidity and mortality in a long-term event-driven study. Aim Few studies compared the clinical efficacy and safety of switch from bosentan to macitentan only in adult patients with pulmonary arterial hypertension. We aimed to evaluate the clinical efficacy and safety of switch from bosentan to macitentan in children and young adults...
December 13, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/29221293/distance-saturation-product-of-the-6-minute-walk-test-predicts-mortality-of-patients-with-non-cystic-fibrosis-bronchiectasis
#17
Meng-Heng Hsieh, Yueh-Fu Fang, Fu-Tsai Chung, Chung-Shu Lee, Yu-Chen Chang, Yuan-Zhang Liu, Cheng-Hsien Wu, Horng-Chyuan Lin
Background: Previous surveillance methods to monitor the prognoses of patients with bronchiectasis are too complex for use in daily practice. The 6-minute walk test (6MWT) is a simple exercise test to predict the prognosis of chronic obstructive airway disease and numerous chronic lung diseases, including idiopathic pulmonary fibrosis. No studies have investigated exercise-induced oxygen desaturation (EID) and distance-saturation product (DSP) of 6MWT to predict the prognoses of patients with bronchiectasis...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29220311/quantifying-the-effects-of-acute-hypoxic-exposure-on-exercise-performance-and-capacity-a-systematic-review-and-meta-regression
#18
Sanjoy K Deb, Daniel R Brown, Lewis A Gough, Christopher P McLellan, Paul A Swinton, S Andy Sparks, Lars R McNaughton
OBJECTIVE: To quantify the effects of acute hypoxic exposure on exercise capacity and performance, which includes continuous and intermittent forms of exercise. DESIGN: A systematic review was conducted with a three-level mixed effects meta-regression. The ratio of means method was used to evaluate main effects and moderators providing practical interpretations with percentage change. DATA SOURCES: A systemic search was performed using three databases (Google scholar, PubMed and SPORTDiscus)...
December 8, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29208757/critical-velocity-determined-by-a-non-exhaustive-method-in-subjects-with-copd
#19
Marceli Rocha Leite, Juliana Souza Uzeloto, Bruna Spolador de Alencar Silva, Ana Paula Coelho Figueira Freire, Fabiano Francisco de Lima, Eduardo Zapaterra Campos, Diego Giulliano Destro Christofaro, Carlos Augusto Kalva-Filho, Dionei Ramos, Ercy Mara Cipulo Ramos
BACKGROUND: Exercise training is an effective and low-cost tool for COPD rehabilitation. Thus, validating a non-exhaustive method to determine a patient's anaerobic threshold would be a very interesting tool in practical settings. We aimed to test the reproducibility of critical velocity values determined in a non-exhaustive manner (CVNE) and tolerance for exercise performed at this physiological marker in subjects with COPD. METHODS: Twelve subjects with COPD were evaluated in this cross-sectional study...
December 5, 2017: Respiratory Care
https://www.readbyqxmd.com/read/29190751/acute-effect-of-dietary-nitrate-on-forearm-muscle-oxygenation-blood-volume-and-strength-in-older-adults-a-randomized-clinical-trial
#20
Gustavo Vieira de Oliveira, Marina Morgado, Carlos Adam Conte-Junior, Thiago Silveira Alvares
Both recovery time of post-exercise muscle oxygenation and muscle strength decline with aging. Although beetroot consumption has been shown to improve muscle oxygenation and exercise performance in adults, these effects in the elderly has not been addressed. The aim of the present study was to evaluate the effect of a beetroot-based gel (BG) on muscle O2 saturation, blood volume (tHb) and handgrip strength in the elderly in response to handgrip exercise. In a randomized crossover double-blind design, twelve older subjects consumed BG (100 g of beetroot-based gel containing ~ 12 mmol nitrate) or PLA (100 g of nitrate-depleted gel nitrate-depleted)...
2017: PloS One
keyword
keyword
93263
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"