Effects of deep breathing on internal oblique and multifidus muscle activity in three sitting postures

Ko, Min-Joo; Jung, E. G.; Kim, Moon-Hwan; Oh, Jae-Seop

doi:10.1589/jpts.30.504

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…The patients were then made to quadruped (four-point kneeling posture) and asked to lift the contralateral arm and leg simultaneously as far as possible until both are approximately parallel to the floor while keeping normal lumbar lordosis. All patients were asked to sustain this position with isometric contraction for 5 s. The EMG was recorded again and the percentage of maximum voluntary contraction (%MVC) of LM muscle in this movement was calculated 13 .…”

Section: Methodsmentioning

confidence: 99%

Differences in Lumbar Multifidus Activity and its Association with Lumbar Range of Motion among patients With Unilateral Chronic Low Back Pain

Baig¹,

Ansari²

2021

PJMHS

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Aim: To determine the significant difference in lumbar multifidus activity within the patient with unilateral chronic low back pain and its association with lumbar range of motion. Study design: Analytical cross-sectional study Study setting and duration: Former institute of Dow University of Health Sciences, Karachi, Pakistan (Institute of Physical Medicine and Rehabilitation) which has become Sindh Institute of Physical Medicine and Rehabilitation and study duration was March 2020 to December 2020. Methodology: About 128 patients with unilateral chronic low back pain were assessed for the lumbar multifidus activity based on the percentage of maximum voluntary contraction through surface electromyography. Lumbar flexion and extension range of motion was measured through Modified-Modified Schober’s test. All the data were analyzed through the Statistical Package of Social Sciences 21. Nonparametric tests were employed. The level of significance was 0.05. Results: The lumbar multifidus activity was significantly increased (p<0.001) on the painful side than the non-painful side. However, there was a significant negative correlation (rh=- 0.551, -0.703; p<0.001) of only painful side lumbar multifidus activity with flexion and extension range of motion. Conclusion: Activity of painful side lumbar multifidus increases in unilateral chronic low back pain. Furthermore, it increases with a decrease in lumbar flexion and extension range of motion. Keywords: Correlation Study, disability, Low Backaches, non-specific low back pain, Surface Electromyography

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Section: Methodsmentioning

confidence: 99%

Differences in Lumbar Multifidus Activity and its Association with Lumbar Range of Motion among patients With Unilateral Chronic Low Back Pain

Baig¹,

Ansari²

2021

PJMHS

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“…We also found that compared to singing only, playing an instrument while singing led to a statistically significant change in subjects' shoulder and back positions. It is known that shoulder and back position affect expiration capacity [8,26,27] and phonatory ability [26,27]; specifically, a straight back and extrarotated shoulders can increase resistance to the air passage in the superior airway tract and affect not only the length of expiration and phonation, but also the quantity of air injected into the lungs [26]. These mechanisms may explain the increase in noise and loss of harmonics we observed in the subjects' voice spectrogram [28] as well as the reduction in the extension of the voice (the voice signal's spectral content was below 4,000 Hz in musician-singers) [1,2,9,27,28].…”

Section: Variation Of Body Posture Without and With Instrumentsmentioning

confidence: 99%

“…The head posture is particularly important because it may impact the sensation of phonatory effort [6] and changes in neck and/or jaw posture may affect vocal emission [7]. Specific shoulder and back postures -especially in the sitting positionhave also been shown to improve voice performance by improving the power and length of phonation [8].…”

Section: Introductionmentioning

confidence: 99%

Voice Parameter Changes in Professional Musician-Singers Singing with and without an Instrument: The Effect of Body Posture

Longo

Stadio

Ralli

et al. 2019

Folia Phoniatr Logop

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Background and Aim: The impact of body posture on vocal emission is well known. Postural changes may increase muscular resistance in tracts of the phono-articulatory apparatus and lead to voice disorders. This work aimed to assess whether and to which extent body posture during singing and playing a musical instrument impacts voice performance in professional musicians. Subjects and Methods: Voice signals were recorded from 17 professional musicians (pianists and guitarists) while they were singing and while they were singing and playing a musical instrument simultaneously. Metrics were extracted from their voice spectrogram using the Multi-Dimensional Voice Program (MDVP) and included jitter, shift in fundamental voice frequency (sF0), shimmer, change in peak amplitude, noise to harmonic ratio, Voice Turbulence Index, Soft Phonation Index (SPI), Frequency Tremor Intensity Index, Amplitude Tremor Intensity Index, and maximum phonatory time (MPT). Statistical analysis was performed using two-tailed t tests, one-way ANOVA, and χ² tests. Subjects’ body posture was visually assessed following the recommendations of the Italian Society of Audiology and Phoniatrics. Thirty-seven voice signals were collected, 17 during singing and 20 during singing and playing a musical instrument. Results: Data showed that playing an instrument while singing led to an impairment of the “singer formant” and to a decrease in jitter, sF0, shimmer, SPI, and MPT. However, statistical analysis showed that none of the MDVP metrics changed significantly when subjects played an instrument compared to when they did not. Shoulder and back position affected voice features as measured by the MDVP metrics, while head and neck position did not. In particular, playing the guitar decreased the amplitude of the “singer formant” and increased noise, causing a typical “raucous rock voice.” Conclusions: Voice features may be affected by the use of the instrument the musicians play while they sing. Body posture selected by the musician while playing the instrument may affect expiration and phonation.

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Mixed reality and sensor real-time feedback to increase muscle engagement during deep core exercising

Lancere

Jürgen²,

Gapeyeva³

2023

Virtual Reality

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In lower extremity amputee rehabilitation programs, difficult-to-master targeted activation of deep core muscles and pursed-lip breathing training are prescribed to treat poor movement quality and to improve recovery after amputation. Non-invasive wireless sensors and mixed reality (MR) technologies are proposed as a solution. The main aim was to validate a novel rehabilitation technology by exploring whether a combined verbal and visual mixed reality feedback (VF + MR) will initiate a greater change in muscle electrical activation magnitude compared to verbal feedback only (VF) during exercising. The second objective was to evaluate the effectiveness of specific exercise program targeted to engage specifically deep core muscles. Pre-post-test cross-over study involved electromyographic activity (EMG) analysis from Transversus Abdominis (TA) and Multifidus (MF) muscles and self-reported questionnaires to evaluate the efficiency of MR feedback. Anthropometric data, state of health, subjective low back pain (Oswestry Disability Index), and physical activity level (IPAQ) estimation were analysed. The data from 13 patients following unilateral transtibial and transfemoral amputation showed a significant EMG increase in (VF + MR) for Chair Lean (p = 0.03) and Bent Leg Raise (p = 0.0005) exercises for TA muscle. Even though there was no significant difference in Back Bridge and Side Plank exercises, 6 to 10 participants depending on the exercise, had an increase of EMG in the range of 50–400% for both – TA and MF muscles. The proposed solution has a high potential for increasing motivation, self-awareness, and muscle engagement during exercises, based on EMG and self-reported questionnaire data.

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Effects of deep breathing on internal oblique and multifidus muscle activity in three sitting postures

Cited by 4 publications

References 10 publications

Differences in Lumbar Multifidus Activity and its Association with Lumbar Range of Motion among patients With Unilateral Chronic Low Back Pain

Differences in Lumbar Multifidus Activity and its Association with Lumbar Range of Motion among patients With Unilateral Chronic Low Back Pain

Voice Parameter Changes in Professional Musician-Singers Singing with and without an Instrument: The Effect of Body Posture

Mixed reality and sensor real-time feedback to increase muscle engagement during deep core exercising

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