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Inspiratory muscles

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https://www.readbyqxmd.com/read/28545625/a-home-based-walking-program-improves-respiratory-endurance-in-patients-with-acute-myocardial-infarction-a-randomized-controlled-trial
#1
Bruna C Matos-Garcia, Isadora S Rocco, Lara D Maiorano, Thatiana C A Peixoto, Rita Simone L Moreira, Antonio C C Carvalho, Aparecida Maria Catai, Ross Arena, Walter J Gomes, Solange Guizilini
BACKGROUND: The purpose of this study was to evaluate respiratory muscle strength and endurance in the inpatient period in patients who recently experienced myocardial infarction (MI) and investigate the effects of a home-based walking program on respiratory strength and endurance in low-risk patients after MI. METHODS: Patients were randomized into a usual-care group (UCG) entailing regular care (n = 23) and an intervention group (IG) entailing an outpatient home-based walking program (n = 31)...
June 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28542364/inspiratory-muscle-activation-increases-with-copd-severity-as-confirmed-by-non-invasive-mechanomyographic-analysis
#2
Leonardo Sarlabous, Abel Torres, José A Fiz, Juana M Martínez-Llorens, Joaquim Gea, Raimon Jané
There is a lack of instruments for assessing respiratory muscle activation during the breathing cycle in clinical conditions. The aim of the present study was to evaluate the usefulness of the respiratory muscle mechanomyogram (MMG) for non-invasively assessing the mechanical activation of the inspiratory muscles of the lower chest wall in both patients with chronic obstructive pulmonary disease (COPD) and healthy subjects, and to investigate the relationship between inspiratory muscle activation and pulmonary function parameters...
2017: PloS One
https://www.readbyqxmd.com/read/28539142/inspiratory-muscle-training-effects-on-cycling-during-acute-hypoxic-exposure
#3
Mitch Lomax, Heather C Massey, James R House
INTRODUCTION: Hypoxic environments increase the physiological demands of exercise. Inspiratory muscle training can reduce the demands of exhaustive exercise in this environment. This study examined the impact of inspiratory muscle training on moderate intensity hypoxic cycling exercise. METHODS: There were 17 healthy adult men who undertook 4 wk of inspiratory muscle training (N = 8) or 4 wk of sham inspiratory muscle training (N = 9). Subjects completed four fixed intensity (100 W) and duration (10 min) cycle ergometry tests...
June 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28522759/effect-of-cyclooxygenase-inhibition-on-the-inspiratory-muscle-metaboreflex-induced-cardiovascular-consequences-in-men
#4
Joshua R Smith, Kaylin D Didier, Shane M Hammer, Andrew M Alexander, Stephanie P Kurti, Steven W Copp, Thomas J Barstow, Craig A Harms
Inspiratory muscle metaboreflex activation increases mean arterial pressure (MAP) and limb vascular resistance (LVR) and decreases limb blood flow (Q̇L). Cyclooxygenase (COX) inhibition has been found to attenuate limb skeletal muscle metaboreflex-induced increases in muscle sympathetic nerve activity. We hypothesized that compared to placebo (PLA), COX inhibition would attenuate inspiratory muscle metaboreflex-induced 1) increases in MAP and LVR and 2) decreases in Q̇L Seven men (22±1 years) were recruited and orally consumed ibuprofen (IB, 10mg/kg) or PLA 90 min prior to performing the cold pressor test (CPT) for 2 min and inspiratory resistive breathing task (IRBT) for 14...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28520769/optimal-method-for-assessment-of-respiratory-muscle-strength-in-neuromuscular-disorders-using-sniff-nasal-inspiratory-pressure-snip
#5
Marta Kaminska, Francine Noel, Basil J Petrof
BACKGROUND: The ability to accurately determine respiratory muscle strength is vitally important in patients with neuromuscular disorders (NMD). Sniff nasal inspiratory pressure (SNIP), a test of inspiratory muscle strength, is easier to perform for many NMD patients than the more commonly used determination of maximum inspiratory pressure measured at the mouth (MIP). However, due to an inconsistent approach in the literature, the optimal technique to perform the SNIP maneuver is unclear...
2017: PloS One
https://www.readbyqxmd.com/read/28503537/effects-of-inspiratory-muscle-exercise-in-the-pulmonary-function-autonomic-modulation-and-hemodynamic-variables-in-older-women-with-metabolic-syndrome
#6
Daniele Jardim Feriani, Hélio José Coelho, Kátia Bilhar Scapini, Oscar Albuquerque de Moraes, Cristiano Mostarda, Olivia Moraes Ruberti, Marco Carlos Uchida, Érico Chagas Caperuto, Maria Cláudia Irigoyen, Bruno Rodrigues
The aim of the present study was to investigate the effects of inspiratory muscle exercise (IME) on metabolic and hemodynamic parameters, cardiac autonomic modulation and respiratory function of older women with metabolic syndrome (MS). For this, sixteen older women with MS and 12 aged-matched controls participated of the present study. Two days before and 2 days after the main experiment, fasting blood samples (i.e., total cholesterol, triglycerides and blood glucose), cardiac autonomic modulation (i.e., heart rate variability), and respiratory muscle function were obtained and evaluated...
April 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28503464/maximal-inspiratory-pressure-and-maximal-expiratory-pressure-in-healthy-korean-children
#7
Woo Hyuk Choi, Myung Jun Shin, Myung Hun Jang, Je Sang Lee, Soo-Yeon Kim, Hye-Young Kim, Younghee Hong, Choongrak Kim, Yong Beom Shin
OBJECTIVE: To evaluate respiratory muscle strength in healthy Korean children in order to establish the criteria for normal reference values for future applications. In contrast with the other parameters for testing pulmonary function, normal values for respiratory muscle strength in healthy Korean children have not been assessed to date. METHODS: We conducted a complete survey of 263 students at Sinmyung Elementary School in Yangsan, Gyeongsangnam-do, and measured their height and body weight, performed pulmonary function tests, and evaluated maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) as measures of respiratory muscle strength...
April 2017: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28502520/-exploring-the-diaphragm-ultrasound-is-essential
#8
REVIEW
P Richard
The diaphragm is the muscle most implicated in breathing. Its morphological exploration usually depends on pulmonary radiography, fluoroscopy, CT-scanning and MRI. Its function is evaluated by the classical respiratory functional tests, the measurement of maximum inspiratory and expiratory pressures, the transdiaphragmatic pressure and even an electromyogram. Ultrasound is a technique still insufficiently used in respiratory medicine. It offers, however, many advantages: it is easy to implement, there is no irradiation, it is usable at the bedside, particularly when the patient is immobile or in intensive care...
May 12, 2017: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/28500413/impaired-pulmonary-function-is-an-additional-potential-mechanism-for-the-reduction-of-functional-capacity-in-clinically-stable-fontan-patients
#9
Aída L R Turquetto, Luiz F Canêo, Daniela R Agostinho, Patrícia A Oliveira, Maria Isabel C S Lopes, Patrícia F Trevizan, Frederico L A Fernandes, Maria A Binotto, Gabriela Liberato, Glaucia M P Tavares, Rodolfo A Neirotti, Marcelo B Jatene
Central factors negatively affect the functional capacity of Fontan patients (FP), but "non-cardiac" factors, such as pulmonary function, may contribute to their exercise intolerance. We studied the pulmonary function in asymptomatic FP and its correlations with their functional capacity. Pulmonary function and cardiopulmonary exercise tests were performed in a prospective study of 27 FP and 27 healthy controls (HC). Cardiovascular magnetic resonance was used to evaluate the Fontan circulation. The mean age at tests, the mean age at surgery, and the median follow-up time of FP were 20(±6), 8(±3), and 11(8-17) years, respectively...
May 12, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28499979/inspiratory-muscle-training-improves-intercostal-and-forearm-muscle-oxygenation-in-patients-with-chronic-heart-failure-evidence-of-the-origin-of-the-respiratory-metaboreflex
#10
Adalgiza M Moreno, Alessandra C Toledo-Arruda, Jéssica S Lima, Carolina S Duarte, Humberto Vilacortta-Junior, Antonio C L Nóbrega
BACKGROUND: The impact of inspiratory muscle training (IMT) on respiratory and peripheral muscle oxygenation and perfusion during inspiratory muscle fatigue in patients with chronic heart failure has not been established. METHODS AND RESULTS: Twenty-six patients with chronic heart failure were randomly assigned to either 8 weeks of IMT or to a control group. Inspiratory fatigue was induced by a progressive inspiratory resistive loading protocol until there was an inability to sustain inspiratory pressure, when the inspiratory muscle metaboreflex should be activated...
May 9, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28488885/respiratory-muscle-strength-and-pulmonary-function-in-children-with-rhinitis-and-asthma-after-a-six-minute-walk-test
#11
Ana Alice de Almeida Soares, Camila Moraes Barros, Cássia Giulliane Costa Santos, Maria Renata Aragão Dos Santos, José Rodrigo Santos Silva, Walderi Monteiro da Silva Junior, Silvia de Magalhães Simões
OBJECTIVE: Rhinitis and asthma decrease quality of life. Few studies have assessed the performance of children with asthma or rhinitis under submaximal exercise. We evaluated maximal respiratory pressures, spirometric parameters, and ability to sustain submaximal exercise in these children before and after the 6-minute walk test (6MWT), compared to healthy children. METHODS: This cross-sectional, analytical study included 89 children aged 6-12 years in outpatient follow-up: 27 healthy (H), 31 with rhinitis (R), and 31 with mild asthma under control (A)...
May 10, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28482864/the-effect-of-pre-and-post-operative-physical-activity-on-recovery-after-colorectal-cancer-surgery-physsurg-c-study-protocol-for-a-randomised-controlled-trial
#12
Aron Onerup, Eva Angenete, David Bock, Mats Börjesson, Monika Fagevik Olsén, Elin Grybäck Gillheimer, Stefan Skullman, Sven-Egron Thörn, Eva Haglind, Hanna Nilsson
BACKGROUND: Surgery for colorectal cancer is associated with a high risk of post-operative adverse events, re-operations and a prolonged post-operative recovery. Previously, the effect of prehabilitation (pre-operative physical activity) has been studied for different types of surgery, including colorectal surgery. However, the trials on colorectal surgery have been of limited methodological quality and size. The aim of this trial is to compare the effect of a combined pre- and post-operative intervention of moderate aerobic physical activity and inspiratory muscle training (IMT) with standard care on post-operative recovery after surgery for colorectal cancer...
May 8, 2017: Trials
https://www.readbyqxmd.com/read/28481631/peak-inspiratory-flow-rate-as-a-criterion-for-dry-powder-inhaler-use-in-chronic-obstructive-pulmonary-disease
#13
Donald A Mahler
Dry powder bronchodilator devices have an internal resistance. Effective use depends on the patient generating an adequate inspiratory flow to break up the powder packets into particles less than five micron in diameter that can be inhaled into the loser respiratory tract. This de-aggregation takes place inside the device before the dose leaves the inhaler; this process is increased if the acceleration is fast at the start of inhalation. Peak inspiratory flow depends on an individual's effort along with strength of the respiratory muscles, which may be compromised in those with chronic obstructive pulmonary disease due to lung hyperinflation, hypoxemia, and muscle wasting...
May 8, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28479116/assisted-vital-capacity-to-assess-recruitment-level-in-neuromuscular-diseases
#14
Dante B Santos, Aurélien Boré, Lorena Del Amo Castrillo, Matthieu Lacombe, Line Falaize, David Orlikowski, Frédéric Lofaso, Hélène Prigent
Respiratory muscle weakness and chest wall abnormalities in neuromuscular diseases (NMD) may lead to decreased pulmonary volumes. We assessed the reversibility of vital capacity (VC) reduction with mechanical In-Exsufflation (MI-E). We evaluated the effects of positive inspiratory and negative expiratory pressures on spirometric variables under passive (without patients' participation) and active (with active participation) application in 47 NMD patients. VC, inspiratory capacity (IC), expiratory reserve volume (ERV) were measured during maneuvers without and with MI-E assistance, delivering inspiratory assistance (+40cmH2O), expiratory assistance (-40cmH2O) and both (±40cmH2O)...
May 4, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28473213/topical-ice-slush-adversely-affects-sniff-nasal-inspiratory-force-after-coronary-bypass-surgery
#15
Rakan I Nazer, Ali M Albarrati
BACKGROUND: Topical cooling with ice slush as an adjunct for myocardial protection during cardiac surgery has been shown to cause freezing injury of the phrenic nerves. This can cause diaphragmatic dysfunction and respiratory complications. METHODS: Twenty (n=20) male patients between the ages of 40 and 60 years were equally randomised to undergo elective coronary artery bypass grafting (CABG) with either cold cardioplegic arrest with topical ice slush cooling or cold cardioplegic arrest without the use of ice slush...
April 6, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28462787/inspiratory-muscle-training-for-children-and-adolescents-with-neuromuscular-diseases-a-systematic-review
#16
REVIEW
Anri Human, Lieselotte Corten, Jennifer Jelsma, Brenda Morrow
Patients with neuromuscular diseases are at risk of morbidity and mortality due to respiratory compromise caused by respiratory muscle weakness. A systematic review was performed using pre-specified search strategies to determine the safety of inspiratory muscle training (IMT) and whether it has an impact on inspiratory muscle strength and endurance, exercise capacity, pulmonary function, dyspnoea and health-related quality of life. Randomised, quasi-randomised, cross-over and clinical controlled trials were included if they assessed the use of an external IMT device compared to no, sham/placebo, or alternative IMT treatment in children aged 5-18 years with neuromuscular diseases...
March 29, 2017: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/28449951/inspiratory-muscle-function-and-exercise-capacity-in-patients-with-heart-failure-with-preserved-ejection-fraction
#17
Patricia Palau, Eloy Domínguez, Eduardo Núñez, Jose María Ramón, Laura López, Joana Melero, Alejandro Bellver, Francisco J Chorro, Vicent Bodí, Antoni Bayés-Genis, Juan Sanchis, Julio Núñez
BACKGROUND: Heart failure with preserved ejection fraction (HFpEF) is a clinical syndrome characterized by impaired exercise capacity due to dyspnea and fatigue. The pathophysiological mechanisms underlying the exercise intolerance in HFpEF are not well established. We sought to evaluate the effects of inspiratory muscle function on exercise tolerance in symptomatic patients with HFpEF. METHODS AND RESULTS: A total of 74 stable symptomatic patients with HFpEF and NYHA II-III underwent a cardiopulmonary exercise test between June 2012 and May 2016...
April 24, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28448001/repeated-measurement-of-respiratory-muscle-activity-and-ventilation-in-mouse-models-of-neuromuscular-disease
#18
Victoria N Jensen, Shannon H Romer, Sarah M Turner, Steven A Crone
Accessory respiratory muscles help to maintain ventilation when diaphragm function is impaired. The following protocol describes a method for repeated measurements over weeks or months of accessory respiratory muscle activity while simultaneously measuring ventilation in a non-anesthetized, freely behaving mouse. The technique includes the surgical implantation of a radio transmitter and the insertion of electrode leads into the scalene and trapezius muscles to measure the electromyogram activity of these inspiratory muscles...
April 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28445110/normobaric-hypoxia-increases-the-growth-hormone-response-to-maximal-resistance-exercise-in-trained-men
#19
Dean Filopoulos, Stuart J Cormack, Douglas G Whyte
This study examined the effect of hypoxia on growth hormone (GH) release during an acute bout of high-intensity, low-volume resistance exercise. Using a single-blinded, randomised crossover design, 16 resistance-trained males completed two resistance exercise sessions in normobaric hypoxia (HYP; inspiratory oxygen fraction, (FiO2) 0.12, arterial oxygen saturation (SpO2) 82 ± 2%) and normoxia (NOR; FiO2 0.21, SpO2 98 ± 0%). Each session consisted of five sets of three repetitions of 45° leg press and bench press at 85% of one repetition maximum...
April 26, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28442632/effect-of-aerobic-exercise-training-on-ventilatory-efficiency-and-respiratory-drive-in-obese-subjects
#20
Mehdi Chlif, Anis Chaouachi, Said Ahmaidi
BACKGROUND: Obese patients show a decline in exercise capacity and diverse degrees of dyspnea in association with mechanical abnormalities, increased ventilatory requirements secondary to the increased metabolic load, and a greater work of breathing. Consequently, obese patients may be particularly predisposed to the development of respiratory muscle fatigue during exercise. The aim of this study was to assess inspiratory muscle performance during incremental exercise in 19 obese male subjects (body mass index 41 ± 6 kg/m(2)) after aerobic exercise training using the noninvasive, inspiratory muscle tension-time index (TT0...
April 25, 2017: Respiratory Care
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