Can increased intra-abdominal pressure in humans be decoupled from trunk muscle co-contraction during steady state isometric exertions?

Cholewicki, Jacek; Ivancic, Paul C.; Radebold, Andrea

doi:10.1007/s00421-002-0598-0

Cited by 64 publications

(43 citation statements)

References 27 publications

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“…Because instability cannot be overcome by the contralateral TrA/IO, the ipsilateral TrA/IO begins to contract along with the contralateral TrA/IO to counterbalance the rotation force toward the ipsilateral side and to improve lumbar stability by increasing intra-abdominal pressure via bilateral TrA/IO contractions. 1,[27][28][29][30] These findings are also thought to be elicited by a diagonal trunk rotation moment; the ipsilateral EO and contralateral TrA/IO contract together to counterbalance the ipsilateral rotation moment on a round foam roll. However, we think further research is needed to clarify the exact mechanism for greater contralateral than ipsilateral TrA/IO activity.…”

Section: Discussionmentioning

confidence: 94%

Comparison of Abdominal Muscle Activity During a Single-Legged Hold in the Hook-Lying Position on the Floor and on a Round Foam Roll

Kim

Jeon

et al. 2011

Journal of Athletic Training

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Context:To improve trunk stability or trunk muscle strength, many athletic trainers and physiotherapists use various types of unstable equipment for training. The round foam roll is one of those unstable pieces of equipment and may be useful for improving trunk stability.Objective: To assess the effect of the supporting surface (floor versus round foam roll) on the activity of abdominal muscles during a single-legged hold exercise performed in the hook-lying position on the floor and on a round foam roll.Design: Crossover study. Setting: University research laboratory. Patients or Other Participants:Nineteen healthy volunteers (11 men, 8 women) from a university population. Intervention(s):The participants were instructed to perform a single-legged hold exercise while in the hook-lying position on the floor (stable surface) and on a round foam roll (unstable surface). Main Outcome Measure(s):Surface electromyography (EMG) signals were recorded from the bilateral rectus abdominis, internal oblique, and external oblique muscles. Dependent variables were examined with a paired t test.Results: The EMG activities in all abdominal muscles were greater during the single-legged hold exercise performed on the round foam roll than on the stable surface.Conclusions: The single-legged hold exercise in the hooklying position on an unstable supporting surface induced greater abdominal muscle EMG amplitude than the same exercise performed on a stable supporting surface. These results suggest that performing the single-legged hold exercise while in the hook-lying position on a round foam roll is useful for activating the abdominal muscles.Key Words: trunk stability, low back pain, electromyography, injury prevention Key Points• The unilateral single-legged hold exercise performed on a round foam roll resulted in greater abdominal muscle activation than did the same exercise performed on a stable surface.• During this exercise on a round foam roll, activation of the transversus abdominis/internal oblique muscles was greater on the contralateral side, but activation of the rectus abdominis and external oblique muscles was greater on the ipsilateral side.

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Section: Discussionmentioning

confidence: 94%

Comparison of Abdominal Muscle Activity During a Single-Legged Hold in the Hook-Lying Position on the Floor and on a Round Foam Roll

Kim

Jeon

et al. 2011

Journal of Athletic Training

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“…One possible cause for this could be the absence of intra-abdominal pressure and intrathoracic pressure from the model [4,57,58]. Prior studies have shown that both intra-abdominal pressure and intrathoracic pressure are elevated during heavy lifting and other strenuous activities [48,59], and these pressures could act to unload the thoracic and lumbar spines [58]. Although thoracic IDP was overpredicted by the model for these heavy lifting activities, lumbar IDP was not.…”

Section: Discussionmentioning

confidence: 99%

Development and Validation of a Musculoskeletal Model of the Fully Articulated Thoracolumbar Spine and Rib Cage

Bruno

Bouxsein

Anderson

2015

Journal of Biomechanical Engineering

163

168

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We developed and validated a fully articulated model of the thoracolumbar spine in OPENSIM that includes the individual vertebrae, ribs, and sternum. To ensure trunk muscles in the model accurately represent muscles in vivo, we used a novel approach to adjust muscle cross-sectional area (CSA) and position using computed tomography (CT) scans of the trunk sampled from a community-based cohort. Model predictions of vertebral compressive loading and trunk muscle tension were highly correlated to previous in vivo measures of intradiscal pressure (IDP), vertebral loading from telemeterized implants and trunk muscle myoelectric activity recorded by electromyography (EMG).

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“…Recall that in our model the movement oscillations describe the intra-abdominal pressure that is known to increase the intrathoracic pressure (Cholewicki et al 2002). These oscillations may be specified by their amplitudes corresponding to the maximal variation of muscle contraction and by the offset (M 0 ) around which these oscillations occur.…”

Section: Dynamicsmentioning

confidence: 99%

Dynamical coupling between locomotion and respiration

Daffertshofer¹,

Huys²,

Beek³

2003

Biological Cybernetics

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Abstract. In search of the formative principles underwriting locomotor-respiratory coupling, we reanalyzed and modeled the data collected by Siegmund and coworkers (1999) on the synchronization of respiration during rowing. Apart from the frequency doubling in respiration reported earlier, detailed time-resolved spectral analyses revealed decreasing stability of entrainment close to abrupt changes in frequency relations as well as switches in the relative phase between respiration and locomotion. A single physiological, albeit mechanically constrained, quantity sufficed to explain the observed frequency and phase locking phenomena: the effective value of oxygen volume in the lungs. The cyclic abdominal pressure modulates the self-sustaining rhythmic respiration, modifies the total lung pressure, and causes (local) maxima at frequency ratios between movement and respiration that are composed of small integers. Hence, optimizing the effective oxygen volume can be seen as the mechanism that drives respiration to synchronize with locomotion.

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Can increased intra-abdominal pressure in humans be decoupled from trunk muscle co-contraction during steady state isometric exertions?

Cited by 64 publications

References 27 publications

Comparison of Abdominal Muscle Activity During a Single-Legged Hold in the Hook-Lying Position on the Floor and on a Round Foam Roll

Comparison of Abdominal Muscle Activity During a Single-Legged Hold in the Hook-Lying Position on the Floor and on a Round Foam Roll

Development and Validation of a Musculoskeletal Model of the Fully Articulated Thoracolumbar Spine and Rib Cage

Dynamical coupling between locomotion and respiration

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