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  • Title: Abdominal muscle activity during breathing in different postural sets in healthy subjects.
    Author: Mesquita Montes A, Gouveia S, Crasto C, de Melo CA, Carvalho P, Santos R, Vilas-Boas JP.
    Journal: J Bodyw Mov Ther; 2017 Apr; 21(2):354-361. PubMed ID: 28532880.
    Abstract:
    OBJECTIVE: This study aims to evaluate the effect of different postural sets on abdominal muscle activity during breathing in healthy subjects. METHODS: Twenty-nine higher education students (20.86 ± 1.48 years; 9 males) breathed at the same rhythm (inspiration: 2 s; expiration: 4 s) in supine, standing, tripod and 4-point-kneeling positions. Surface electromyography was performed to assess the activation intensity of rectus abdominis, external oblique and transversus abdominis/internal oblique muscles during inspiration and expiration. RESULTS: During both breathing phases, the activation intensity of external oblique and transversus abdominis/internal oblique was significantly higher in standing when compared to supine (p ≤ 0.001). No significant differences were found between tripod position and 4-point-kneeling positions. Transversus abdominis/internal oblique activation intensity in these positions was higher than in supine and lower than in standing. CONCLUSIONS: Postural load and gravitational stretch are factors that should be considered in relation to the specific recruitment of abdominal muscles for breathing mechanics.
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