Abstract 2403: Inspiratory Muscle Training Decreases Central and Peripheral Sympathetic Activity Improves Reflex Vasodilatory Blood Flow in Patients with Chronic Heart Failure

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Priscila Mello ◽  
Grazia Guerra ◽  
Pedro Dall’ago ◽  
Suellen Borille ◽  
Maria U Rondom ◽  
...  
Keyword(s):  
Blood Flow ◽  
Muscle Weakness ◽  
Sympathetic Activity ◽  
Forearm Blood Flow ◽  
Inspiratory Muscle ◽  
Inspiratory Muscle Training ◽  
Inspiratory Pressure ◽  
Maximal Inspiratory Pressure ◽  
Muscle Training ◽  
Peripheral Sympathetic Activity

Background: Inspiratory muscle training (IMT) improves functional capacity of patients with CHF but the mechanisms of this effect are unknown. Objective: We tested the hypothesis that IMT could decrease sympathetic activity and improve the reflex muscle vasodilatory response during exercise in patients (CHF) and inspiratory muscle weakness. Methods: Six patients with CHF and inspiratory muscle weakness (maximal inspiratory pressure <70% of predicted) NYHA Class II–III, EF <35%, peak VO(2) < 20 ml/kg/min, were submitted to a IMT during 12 weeks (30 minute breathing with an inspiratory resistance of 30% of maximal inspiratory pressure). Muscle sympathetic nerve activity (MSNA) was recorded by microneurography, LF (sympathetic) and HF (parasympathetic) components of the heart rate variability and LF/HF ratio were assessed by the use of power spectral analysis of RR interval. Forearm blood flow (FBF) was measured by venous occlusion plethysmography at baseline and during hand grip (HG) manouver. Paired student t-test was used to analyze the impact of IMT in this population. Results: Compared to baseline, IMT significantly (p < 0,05) caused: an increase in inspiratory muscle force by 130%; a 15% reduction in MSNA (40 ± 1 vs 33 ± 1 bursts/min); an increase in forearm blood flow (0.8+/−0.1 mL/min/100 g) during HG manouver; a decrease in LF% (59 ± 5 vs 39 ± 3 U); an increase in HF% (40 ± 5 vs 61 ± 3 U); a decrease in LF/HF ratio (1,74 vs 0,66). Conclusions: Twelve weeks of Inspiratory muscle training in patients with CHF and inspiratory muscle weakness promoted a significant improvement in cardiovascular parameters, such as increase in limb blood flow, cardiac autonomic balance and baroreflex sensitivity, associated with a decrease in peripheral sympathetic activity.

Inspiratory Muscle Training: Improvement of Exercise Performance With Acute Hypoxic Exposure

2019 ◽  
Vol 14 (8) ◽  
pp. 1124-1131 ◽  
Author(s):  
Daniel G. Hursh ◽  
Marissa N. Baranauskas ◽  
Chad C. Wiggins ◽  
Shane Bielko ◽  
Timothy D. Mickleborough ◽  
...  
Keyword(s):  
Endurance Exercise ◽  
Exercise Performance ◽  
Perceived Exertion ◽  
Submaximal Exercise ◽  
Inspiratory Muscle ◽  
Inspiratory Muscle Training ◽  
Inspiratory Pressure ◽  
Hypoxic Exposure ◽  
Maximal Inspiratory Pressure ◽  
Muscle Training

Endurance exercise performance in hypoxia may be influenced by an ability to maintain high minute ventilation () in defense of reduced arterial oxyhemoglobin saturation. Inspiratory muscle training (IMT) has been used as an effective intervention to attenuate the negative physiological consequences associated with an increased , resulting in improved submaximal-exercise performance in normoxia. However, the efficacy of IMT on hypoxic exercise performance remains unresolved. Purpose: To determine whether chronic IMT improves submaximal-exercise performance with acute hypoxic exposure. Methods: A total of 14 endurance-trained men completed a 20-km cycling time trial (TT) in normobaric hypoxia (fraction of inspired oxygen [FiO2] = 0.16) before and after either 6 wk of an IMT protocol consisting of inspiratory loads equivalent to 80% of sustained maximal inspiratory pressure (n = 9) or a SHAM protocol (30% of sustained maximal inspiratory pressure; n = 5). Results: In the IMT group, 20-km TT performance significantly improved by 1.45 (2.0%), P = .03, after the 6-wk intervention. The significantly faster TT times were accompanied by a higher average (pre vs post: 99.3 [14.5] vs 109.9 [18.0] L·min−1, P = .01) and absolute oxygen uptake (pre vs post: 3.39 [0.52] vs 3.60 [0.58] L·min−1, P = .010), with no change in ratings of perceived exertion or dyspnea (P > .06). There were no changes in TT performance in the SHAM group (P = .45). Conclusion: These data suggest that performing 6 wk of IMT may benefit hypoxic endurance exercise performance lasting 30–40 min.

Do different loads in inspiratory muscle training alter maximal inspiratory pressure and ventilator weaning time?

2017 ◽  
Vol 42 ◽  
pp. 391
Author(s):  
Gisele Martins Leite dos Santos ◽  
João Victor Alvares Guzzo ◽  
Ivete Alonso Bredda Saad ◽  
Luciana Castilho de Figueiredo ◽  
Desanka Dragosavac ◽  
...  
Keyword(s):  
Ventilator Weaning ◽  
Inspiratory Muscle ◽  
Inspiratory Muscle Training ◽  
Inspiratory Pressure ◽  
Maximal Inspiratory Pressure ◽  
Muscle Training

Efficacy of inspiratory muscle training on inspiratory muscle function, functional capacity, and quality of life in patients with asthma: A randomized controlled trial

2021 ◽  
pp. 026921552098404
Author(s):  
Susan Martins Lage ◽  
Danielle Aparecida Gomes Pereira ◽  
Anna Luísa Corradi Magalhães Nepomuceno ◽  
Anna Cláudia de Castro ◽  
Augusto Gonçalves Araújo ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Training Group ◽  
Inspiratory Muscle ◽  
Inspiratory Muscle Training ◽  
Inspiratory Pressure ◽  
Maximal Inspiratory Pressure ◽  
Muscle Training ◽  
Post Intervention ◽  
Randomized Controlled

Objective: To evaluate the efficacy of an inspiratory muscle training protocol on inspiratory muscle function, functional capacity, and quality of life in patients with asthma. Design: A single-blind, randomized controlled clinical trial. Setting: Community-based. Subjects: Patients with asthma, aged between 20 and 70 years old, non-smokers. Interventions: Participants were randomized into two groups: inspiratory muscle training group performed inspiratory muscle training 5 days a week for 8 weeks, consisting of six sets of 30 breaths per day with a training load ⩾50% of maximal inspiratory pressure, plus an educational program; the control group only received the educational program. Main measurements: Maximal inspiratory pressure, inspiratory muscle endurance, and the distance performed on the incremental shuttle walking test were assessed pre-intervention, post-intervention and at follow-up (3 months after the end of the intervention). The asthma quality of life questionnaire was applied pre and post-intervention. Results: Data from 39 participants were analyzed. Maximal inspiratory pressure in percentage of predicted and endurance test duration were significantly higher post-intervention in the inspiratory muscle training group (∆ post–pre: 50.8% vs 7.3% of predicted – P < 0.001 and ∆ post–pre: 207.9 seconds vs 2.7 seconds – P < 0.001, respectively). There was no significant difference in the incremental shuttle walking distance between groups (∆ post–pre: 30.9 m vs −8.1 m, P = 0.165). Quality of life was perceived as significantly better, without a difference between groups ( P > 0.05). Conclusions: About 8 weeks of inspiratory muscle training in patients with controlled asthma significantly increased inspiratory muscle strength and endurance.

Inspiratory Muscle Training Improves Aerobic Capacity in Amateur Indoor Football Players

2020 ◽  
Author(s):  
Matheus Martins de Sousa ◽  
Matheus dos Santos Pimentel ◽  
Isabela de Andrade Sobreira ◽  
Rondineli de Jesus Barros ◽  
Audrey Borghi-Silva ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Aerobic Capacity ◽  
Inspiratory Muscle ◽  
Inspiratory Muscle Training ◽  
Inspiratory Pressure ◽  
Step Test ◽  
Soccer Players ◽  
Maximal Inspiratory Pressure ◽  
Muscle Training ◽  
Low Intensity

AbstractInspiratory muscle training represents a recommended clinical practice to improve physical performance of healthy individuals, athletes, and those with chronic diseases. This study aimed to evaluate whether high- and low-intensity inspiratory muscle training interferes with the aerobic capacity of indoor soccer players. Volunteers were equally and randomly divided into CON (control group, no inspiratory muscle training); HIG (high-intensity group, inspiratory muscle training at 80% of maximal inspiratory pressure, 3 sets of 12 repetitions); and LIG (low-intensity group, inspiratory muscle training at 50% of maximal inspiratory pressure, 2 sets of 20 repetitions). Before and after inspiratory muscle training, maximal inspiratory and expiratory pressures, the incremental shuttle run test, and the 3-min step test were evaluated. Both inspiratory muscle training protocols improved maximal inspiratory and expiratory pressures, and indirect maximal oxygen consumption and distance traveled in the shuttle test compared to CON. However, only HIG achieved significant increases of indirect oxygen consumption and frequency of step rise in the 3-min step test (p<0.05). Inspiratory muscle training is an important tool to enhance maximal inspiratory pressure and exercise tolerance with potential benefits on submaximal aerobic capacity. However, high-intensity inspiratory muscle training improved aerobic capacity in amateur indoor soccer players in both submaximal tests.

scholarly journals Best mode of inspiratory muscle training in heart failure patients: a systematic review and meta-analysis

2018 ◽  
Vol 25 (16) ◽  
pp. 1691-1701 ◽  
Author(s):  
Zahra Sadek ◽  
Ali Salami ◽  
Wissam H Joumaa ◽  
Charifa Awada ◽  
Said Ahmaidi ◽  
...  
Keyword(s):  
Heart Failure ◽  
Inspiratory Muscle ◽  
Inspiratory Muscle Training ◽  
Inspiratory Pressure ◽  
Walking Distance ◽  
Maximal Inspiratory Pressure ◽  
Muscle Training ◽  
Heart Failure Patients ◽  
Randomised Controlled ◽  
Inspiratory Muscle Strength

Objectives The objective of this study was to evaluate the effects of inspiratory muscle training on inspiratory muscle strength, functional capacity and dyspnoea for patients with chronic heart failure, by summarising the published research on the effects of inspiratory muscle training. To identify the best mode of intervention in terms of: the load of maximal inspiratory pressure; the frequency of sessions; and the total duration of intervention. Methods A relevant literature research using the PubMed database, Cochrane and references of published studies, from 1998 to 2016, was conducted. Out of 65 randomised controlled trials, seven were considered as potentially relevant and were retrieved for detailed analysis. The methodological quality of each randomised controlled trial was rated using the physiotherapy evidence database scale. Results The included seven studies contained data on 203 patients. Typical training protocols involved training three, six or seven times per week with intensity ranging from 30% to 60% and for a duration ranging from 6 to 12 weeks. Maximal inspiratory pressure, walking distance and dyspnoea were improved in all studies and especially in those who set a load of 60% in their maximal inspiratory pressure, and have trained patients six times per week for 12 weeks. Conclusion In chronic heart failure patients, inspiratory muscle training results in a marked improvement in inspiratory muscle strength, walking distance and dyspnoea, notably when training patients at 60% of maximal inspiratory pressure, six times per week and for 12 weeks. A small number of studies and heterogeneity among studies may limit the findings of the present study.

scholarly journals Measurement validity of an electronic training device to assess breathing characteristics during inspiratory muscle training in patients with weaning difficulties

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0255431
Author(s):  
Marine Van Hollebeke ◽  
Diego Poddighe ◽  
Tin Gojevic ◽  
Beatrix Clerckx ◽  
Jan Muller ◽  
...  
Keyword(s):  
Real Time ◽  
Muscle Function ◽  
Respiratory Muscle ◽  
Work Of Breathing ◽  
Inspiratory Muscle ◽  
Inspiratory Muscle Training ◽  
Inspiratory Pressure ◽  
Training Device ◽  
Maximal Inspiratory Pressure ◽  
Muscle Training

Inspiratory muscle training (IMT) improves respiratory muscle function and might enhance weaning outcomes in patients with weaning difficulties. An electronic inspiratory loading device provides valid, automatically processed information on breathing characteristics during IMT sessions. Adherence to and quality of IMT, as reflected by work of breathing and power generated by inspiratory muscles, are related to improvements in inspiratory muscle function in patients with chronic obstructive pulmonary disease. The aim of this study was to investigate the validity of an electronic training device to assess and provide real-time feedback on breathing characteristics during inspiratory muscle training (IMT) in patient with weaning difficulties. Patients with weaning difficulties performed daily IMT sessions against a tapered flow-resistive load of approximately 30 to 50% of the patient’s maximal inspiratory pressure. Airflow and airway pressure measurements were simultaneously collected with the training device (POWERbreatheKH2, POWERbreathe International Ltd, UK) and a portable spirometer (reference device, Pocket-Spiro USB/BT100, M.E.C, Belgium). Breath by breath analysis of 1002 breaths of 27 training sessions (n = 13) against a mean load of 46±16% of the patient’s maximal inspiratory pressure were performed. Good to excellent agreement (Intraclass correlation coefficients: 0.73–0.97) was observed for all breathing characteristics. When individual differences were plotted against mean values of breaths recorded by both devices, small average biases were observed for all breathing characteristics. To conclude, the training device provides valid assessments of breathing characteristics to quantify inspiratory muscle effort (e.g. work of breathing and peak power) during IMT in patients with weaning difficulties. Availability of valid real-time data of breathing responses provided to both the physical therapist and the patient, can be clinically usefull to optimize the training stimulus. By adapting the external load based on the visual feedback of the training device, respiratory muscle work and power generation during IMT can be maximized during the training.

scholarly journals Association Between Inspiratory Muscle Function and Balance Ability in Older People: A Pooled Data Analysis Before and After Inspiratory Muscle Training

2021 ◽  
pp. 1-13
Author(s):  
Francesco V. Ferraro ◽  
James P. Gavin ◽  
Thomas W. Wainwright ◽  
Alison K. McConnell
Keyword(s):  
Muscle Function ◽  
Evaluation System ◽  
Inspiratory Flow ◽  
Inspiratory Muscle ◽  
Inspiratory Muscle Training ◽  
Inspiratory Pressure ◽  
Maximal Inspiratory Pressure ◽  
Muscle Training ◽  
Peak Inspiratory Flow ◽  
Balance Ability

Inspiratory muscle training (IMT) improved balance ability and respiratory muscle function in healthy older adults. The current study is a retrospective analysis to explore the relationship between inspiratory muscle function, balance ability, and adaptation to IMT. All participants (total = 129; IMT = 60; age range = 65–85 years) performed inspiratory and balance assessments, including the mini-balance evaluation system test, maximal inspiratory pressure, and peak inspiratory flow tests. Baseline inspiratory muscle function was positively related to balance ability (p < .05), and IMT-induced improvements in inspiratory function (23.3% in maximal inspiratory pressure, 8.0% in peak inspiratory flow rate, 14.9% in maximal peak inspiratory power) were related to improvements in balance (10.6% in mini-balance evaluation system test), with the greatest improvements (17.0%) observed in the oldest participants (76–85 years old, p < .05). In conclusion, with or without IMT, positive associations between inspiratory function and balance ability exist, with greater improvements in inspiratory muscle function related to greater improvements in balance ability.

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