Acute effects of incremental inspiratory loads on compartmental chest wall volume and predominant activity frequency of inspiratory muscle

Gama, Alana Elza Fontes da; Carvalho, Larissa de Andrade; Feitosa, Larissa Andrade de Sá; Nascimento, Jasiel; Silva, Marilú Gomes Netto Monte da; Amorim, César Ferreira; Aliverti, Andréa; Lambertz, Daniel; Rodrigues, M. A. B.; Andrade, Armèle Dornelas de

doi:10.1016/j.jelekin.2013.07.014

Cited by 10 publications

(10 citation statements)

References 32 publications

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“…Studies reporting the acute effects of inspiratory loads on the electrical activity of the respiratory muscles in healthy subjects were performed by Da Gama et al (2013). In contrast to our results, they found a decrease in the activity of the SCM and diaphragm muscles in response to increased inspiratory load above 30 cmH 2 O.…”

Section: Discussioncontrasting

confidence: 99%

“…The increase in chest wall (V T,CW ) and compartmental (V T,RCP , V T,RCa , and V T,Ab ) volumes was similar in both groups and although these volumes presented higher values in MIP 40% the change was not significant. Da Gama et al (2013) analyzed the acute effects of increased inspiratory loads in healthy subjects using sEMG and OEP. Their results showed differences in volume generation depending on gender.…”

Section: Discussionmentioning

confidence: 99%

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Acute Effects of Inspiratory Loads and Interfaces on Breathing Pattern and Activity of Respiratory Muscles in Healthy Subjects

et al. 2019

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Objectives The aim of this study was to evaluate the acute effects of different inspiratory loads and different interfaces on the breathing pattern and activity of the respiratory muscles. Methods Twenty healthy adults were recruited and assigned to two groups (20 and 40% of the Maximal Inspiratory Pressure) by way of randomized crossover allocation. Subjects were evaluated during quiet breathing, breathing against inspiratory load, and recovery. The measurements were repeated using two different interfaces (nasal and oral). Chest wall volumes and respiratory muscle activity were assessed with optoelectronic plethysmography and surface electromyography, respectively. Results During the application of inspiratory load, significant changes were observed in the respiratory rate ( p < 0.04), inspiratory time ( p < 0.02), minute ventilation ( p < 0.04), tidal volume ( p < 0.01), end-inspiratory volume ( p < 0.04), end-expiratory volume ( p < 0.03), and in the activity of the scalene, sternocleiomastoid, and parasternal portion of the intercostal muscles (RMS values, p < 0.01) when compared to quiet breathing, regardless of the load level or the interface applied. Inspiratory load application yielded significant differences between using nasal and oral interfaces with an increase in the tidal volume ( p < 0.01), end-inspiratory volume ( p < 0.01), and electrical activity of the scalene and sternocleiomastoid muscles ( p < 0.01) seen with using the nasal interface. Conclusion The addition of an inspiratory load has a significant effect on the breathing pattern and respiratory muscle electrical activity, and the effects are greater when the nasal interface is applied.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Acute Effects of Inspiratory Loads and Interfaces on Breathing Pattern and Activity of Respiratory Muscles in Healthy Subjects

et al. 2019

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“…Our study demonstrated a considerable SCM muscle activation in eupnea for both groups, with significant reduction in its activation following the intervention in the IMT group. Gama et al 29 have also shown a reduction on SCM muscle activation, however the effects were only observed immediately after the IMT and on healthy individuals.…”

Section: Discussionmentioning

confidence: 94%

Sternocleidomastoid muscle activation following inspiratory muscle training in patients with chronic obstructive pulmonary disease: a randomized clinical trial

et al. 2020

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This study aims to assess the effect of short-time low frequency inspiratory muscle trainer (Threshold IMT) on inspiratory muscle strength and electromyographic activity of the sternocleidomastoid (SCM) muscle in people with chronic obstructive pulmonary disease (COPD). People with COPD participating in a lung rehabilitation program were allocated to a control or inspiratory muscle training (IMT) group. The control group participated in the usual rehabilitation, whereas the other group received IMT (performed with a load of 50% maximal inspiratory pressure (MIP) adjusted weekly). Both interventions lasted for 2 months. Outcomes included electromyographic analysis of the SCM and MIP. In total, ten participants were allocated to each group. The IMT group presented an increase in absolute (p<0.001) and predicted (p<0.001) values of MIP and also in pre- and post-intervention variation between groups (p=0.003 and p=0.008, respectively). Such differences were not found in the control group. The SCM muscle activity decreased in the IMT post intragroup evaluation (p=0.008). IMT provided a reduction of the electromyographic activity of SCM in COPD patients, also increasing inspiratory muscle strength in the study participants.

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“…32 Another study, conducted in healthy adults and using optoelectronic plethysmography, also corroborates our findings with similar increases in chest wall V T (due to V T increases in the pulmonary rib cage and in the abdominal rib cage), inspiratory time, and total time of the respiratory cycle in response to the use of inspiratory loads, which ranged from 0 to 40 cm H 2 O). 33 We correlate the increase in inspiratory time to a greater time for lung filling, which also increases the end-inspiratory volume. We found association between the maintenance of the expiratory time to the absence of ventilatory repercussions, thus avoiding the increase of the end-expiratory volume and not causing dynamic hyperinflation.…”

Section: Discussionmentioning

confidence: 99%

Effects of Inspiratory Load on Chest Wall Kinematics, Breathing Pattern, and Respiratory Muscle Activity of Mouth-Breathing Children

et al. 2020

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BACKGROUND: We sought to evaluate the acute effects of different inspiratory loads using nasal and oral interfaces on the volumes of the chest wall and its compartments, breathing pattern, and respiratory muscle activation in children with mouth-breathing syndrome. METHODS: Children with mouth-breathing syndrome were randomized into 2 groups, one with an inspiratory load intensity 20% of maximum inspiratory pressure (n 5 14), and the other with an inspiratory load intensity 40% of maximum inspiratory pressure (n 5 15). The chest wall volumes and electromyography of sternocleidomastoid, rectus abdominis, scalene, and internal intercostal muscles were used to analyze respiration against the 2 load intensities and using 2 interfaces (ie, nasal and oral). RESULTS: A total of 72 children with mouth-breathing syndrome were recruited, and 29 were evaluated in this study. The use of inspiratory load promoted improvement in the components of the breathing pattern: breathing frequency (P 5 .039), inspiratory time (P 5 .03), and total respiratory time (P 5 .043); and increases in tidal volume (P < .001), end-inspiratory volume (P < .001), and electrical activity of scalene muscles and sternocleidomastoid muscles (P < .001) when compared to quiet breathing. The load imposed via a nasal interface versus an oral interface provided an increase in tidal volume (P 5 .030), endinspiratory volume (P 5 .02), and electrical activity of scalene muscles (P < .001) and sternocleidomastoid muscles (P 5 .02). CONCLUSIONS: The use of acute inspiratory loads improved the breathing pattern and increased lung volume and electrical activity of inspiratory muscles. This work brings new perspective to the investigation of using nasal interfaces during the application of inspiratory loads. The nasal interface was more effective compared to the oral interface commonly used in clinical practice.

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Acute effects of incremental inspiratory loads on compartmental chest wall volume and predominant activity frequency of inspiratory muscle

Cited by 10 publications

References 32 publications

Acute Effects of Inspiratory Loads and Interfaces on Breathing Pattern and Activity of Respiratory Muscles in Healthy Subjects

Acute Effects of Inspiratory Loads and Interfaces on Breathing Pattern and Activity of Respiratory Muscles in Healthy Subjects

Sternocleidomastoid muscle activation following inspiratory muscle training in patients with chronic obstructive pulmonary disease: a randomized clinical trial

Effects of Inspiratory Load on Chest Wall Kinematics, Breathing Pattern, and Respiratory Muscle Activity of Mouth-Breathing Children

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