Relationship between inspiratory muscle capacity and peak exercise tolerance in patients post-myocardial infarction

Neves, Laura Maria Tomazi; Karsten, Marlus; Neves, Victor Ribeiro; Beltrame, Thomas; Borghi‐Silva, Audrey; Catai, Aparecida Maria

doi:10.1016/j.hrtlng.2011.07.010

Cited by 28 publications

(32 citation statements)

References 28 publications

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“…In addition, inspiratory muscle strength and resistance are directly associated to V . O 2 peak in patients with recent acute myocardial infaction 18 , reinforcing the idea that the inspiratory muscles may contribute for the reduction of functional capacity. A recent study shows that inspiratory muscle strength is also associated with the central hemodynamic measurements at rest, including cardiac output, mean arterial pulmonary pressure and pulmonary vascular resistance in patients with HF 19 .…”

Section: Introductionsupporting

confidence: 53%

The contribution of inspiratory muscles function to exercise limitation in heart failure: pathophysiological mechanisms

Ribeiro¹,

Chiappa²,

Callegaro³

2012

Rev. bras. fisioter.

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Section: Introductionsupporting

confidence: 53%

The contribution of inspiratory muscles function to exercise limitation in heart failure: pathophysiological mechanisms

Ribeiro¹,

Chiappa²,

Callegaro³

2012

Rev. bras. fisioter.

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“…The peak oxygen uptake, peak , was computed during a maximum cardiopulmonary exercise test performed on a treadmill using a ramp protocol. The criteria for exercise interruption were based on [37] and the assessment was made according to [38]. In our population the median (25 th –75 th percentile) of the peak in each age bin was 2271 (1574–2894), 2340 (1993–3135), 2384 (1712–3080), 2026 (1363–2484) and 1825 (1436–2025) mL .…”

Section: Experimental Protocol and Data Analysismentioning

confidence: 99%

Effect of Age on Complexity and Causality of the Cardiovascular Control: Comparison between Model-Based and Model-Free Approaches

et al. 2014

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The proposed approach evaluates complexity of the cardiovascular control and causality among cardiovascular regulatory mechanisms from spontaneous variability of heart period (HP), systolic arterial pressure (SAP) and respiration (RESP). It relies on construction of a multivariate embedding space, optimization of the embedding dimension and a procedure allowing the selection of the components most suitable to form the multivariate embedding space. Moreover, it allows the comparison between linear model-based (MB) and nonlinear model-free (MF) techniques and between MF approaches exploiting local predictability (LP) and conditional entropy (CE). The framework was applied to study age-related modifications of complexity and causality in healthy humans in supine resting (REST) and during standing (STAND). We found that: 1) MF approaches are more efficient than the MB method when nonlinear components are present, while the reverse situation holds in presence of high dimensional embedding spaces; 2) the CE method is the least powerful in detecting age-related trends; 3) the association of HP complexity on age suggests an impairment of cardiac regulation and response to STAND; 4) the relation of SAP complexity on age indicates a gradual increase of sympathetic activity and a reduced responsiveness of vasomotor control to STAND; 5) the association from SAP to HP on age during STAND reveals a progressive inefficiency of baroreflex; 6) the reduced connection from HP to SAP with age might be linked to the progressive exploitation of Frank-Starling mechanism at REST and to the progressive increase of peripheral resistances during STAND; 7) at REST the diminished association from RESP to HP with age suggests a vagal withdrawal and a gradual uncoupling between respiratory activity and heart; 8) the weakened connection from RESP to SAP with age might be related to the progressive increase of left ventricular thickness and vascular stiffness and to the gradual decrease of respiratory sinus arrhythmia.

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“…The following will be considered: failure to maintain the stipulated load at 12 breaths/minute for at least 1 minute, failure to maintain respiratory effort indicated by the volunteer (BORG/CR10≥7) (36) and the participant requesting interruption. The highest percentage of MIP that the volunteer is able to maintain for at least 1 min (PThMÁX) will be stipulated as the RME measurement (26)(27)(28)47).…”

Section: Protocol For the Determination Of Critical Inspiratory Pressmentioning

confidence: 99%

Critical inspiratory pressure - new methodology for evaluating and training the inspiratory musculature for recreational cyclists: study protocol for a randomized control trial

Rehder-Santos

Minatel

Milan‐Mattos

et al. 2019

Preprint

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Background: Inspiratory muscle training(IMT) has brought great benefits to improving physical performance in healthy individuals. However, there is no consensus regarding the best training load as in most cases the maximum inspiratory pressure(MIP) has been used, whereby 60% of MIP is the most used. Therefore, the prescription of an IMT protocol that takes into account respiratory muscle strength and endurance may bring additional benefits to the commonly used protocols as respiratory muscles differ from other muscles because of their greater muscular resistance. Thus, IMT using inspiratory critical pressure(PThC) appears as an alternative since the calculation of PThC considers these characteristics. Therefore, the aim of this study is to propose a new IMT protocol to determine the best training load for recreational cyclists. Methods: Thirty recreational cyclists(between 20-40 years) will be randomized to the SHAM Group(SG), the PThC Group(PCG) and the 60% of MIP Group(60G), taking into account age and aerobic functional capacity. All participants will undergo the following evaluations: pulmonary function test(PFT), respiratory muscle strength test(RMS), cardiopulmonary test(CPET), incremental respiratory muscle endurance test(iRME) [maximum sustained respiratory pressure for 1 minute(PThMAX)] and constant load test(CLT) (95%, 100% and 105% of PThMÁX) using a linear load inspiratory resistor(PowerBreathe K5). The PThC will be calculated from the inspiratory muscle endurance time(TLIM) and inspiratory loads of each CLT. The IMT will last 11 weeks(3 times/week and 1 hour/session). The session will consist of 5-minute warm-ups(50% of the training load) and 3 sets of 15-minute breaths (100% of the training load), with a 1 minute interval between them. RMS, iRME, CLT and CPET will be performed before, at week 3 and 7(to adjust the training load) and after training. PFT will be performed before and after training. The data will be analyzed by specific statistical tests (parametric or non-parametric) according to the data distribution and their respective variances. The p <0.05 will be established. Conclusions: It is expected that the results of this study will enable the training performed with PThC to be used by health professionals as a new tool to evaluate and prescribe IMT. Clinical Trial: ClinicalTrial.gov, ID Number NCT02984189. Registered in December 6, 2016, https://clinicaltrials.gov/ct2/show/NCT02984189.

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Relationship between inspiratory muscle capacity and peak exercise tolerance in patients post-myocardial infarction

Cited by 28 publications

References 28 publications

The contribution of inspiratory muscles function to exercise limitation in heart failure: pathophysiological mechanisms

The contribution of inspiratory muscles function to exercise limitation in heart failure: pathophysiological mechanisms

Effect of Age on Complexity and Causality of the Cardiovascular Control: Comparison between Model-Based and Model-Free Approaches

Critical inspiratory pressure - new methodology for evaluating and training the inspiratory musculature for recreational cyclists: study protocol for a randomized control trial

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